3b015dfc7d
AVX512 wide universal intrinsics (#14210) * Added implementation of 512-bit wide universal intrinsics(WIP) * Added implementation of 512-bit wide universal intrinsics: implemented WUI vector types(WIP) * Added implementation of 512-bit wide universal intrinsics(WIP): implemented load/store * Added implementation of 512-bit wide universal intrinsics(WIP): implemented fp16 load/store * Added implementation of 512-bit wide universal intrinsics(WIP): implemented recombine and zip, implemented non-saturating and saturating arithmetics * Added implementation of 512-bit wide universal intrinsics(WIP): implemented bit operations * Added implementation of 512-bit wide universal intrinsics(WIP): implemented comparisons * Added implementation of 512-bit wide universal intrinsics(WIP): implemented lane shifts and reduction * Added implementation of 512-bit wide universal intrinsics(WIP): implemented absolute values * Added implementation of 512-bit wide universal intrinsics(WIP): implemented rounding and cast to float * Added implementation of 512-bit wide universal intrinsics(WIP): implemented LUT * Added implementation of 512-bit wide universal intrinsics(WIP): implemented type extension/narrowing and matrix operations * Added implementation of 512-bit wide universal intrinsics(WIP): implemented load_deinterleave for 2 and 3 channels images * Added implementation of 512-bit wide universal intrinsics(WIP): reimplemented load_deinterleave for 2- and implemented for 4-channel images * Added implementation of 512-bit wide universal intrinsics(WIP): implemented store_interleave * Added implementation of 512-bit wide universal intrinsics(WIP): implemented signmask and checks * Added implementation of 512-bit wide universal intrinsics(WIP): build fixes * Added implementation of 512-bit wide universal intrinsics(WIP): reimplemented popcount in case AVX512_BITALG is unavailable * Added implementation of 512-bit wide universal intrinsics(WIP): reimplemented zip * Added implementation of 512-bit wide universal intrinsics(WIP): reimplemented rotate for s8 and s16 * Added implementation of 512-bit wide universal intrinsics(WIP): reimplemented interleave/deinterleave for s8 and s16 * Added implementation of 512-bit wide universal intrinsics(WIP): updated v512_set macros * Added implementation of 512-bit wide universal intrinsics(WIP): fix for GCC wrong _mm512_abs_pd definition * Added implementation of 512-bit wide universal intrinsics(WIP): reworked v_zip to avoid AVX512_VBMI intrinsics * Added implementation of 512-bit wide universal intrinsics(WIP): reworked v_invsqrt to avoid AVX512_ER intrinsics * Added implementation of 512-bit wide universal intrinsics(WIP): reworked v_rotate, v_popcount and interleave/deinterleave for U8 to avoid AVX512_VBMI intrinsics * Added implementation of 512-bit wide universal intrinsics(WIP): fixed integral image SIMD part * Added implementation of 512-bit wide universal intrinsics(WIP): fixed warnings * Added implementation of 512-bit wide universal intrinsics(WIP): fixed load_deinterleave for u8 and u16 * Added implementation of 512-bit wide universal intrinsics(WIP): fixed v_invsqrt accuracy for f64 * Added implementation of 512-bit wide universal intrinsics(WIP): fixed interleave/deinterleave for u32 and u64 * Added implementation of 512-bit wide universal intrinsics(WIP): fixed interleave_pairs, interleave_quads and pack_triplets * Added implementation of 512-bit wide universal intrinsics(WIP): fixed rotate_left * Added implementation of 512-bit wide universal intrinsics(WIP): fixed rotate_left/right, part 2 * Added implementation of 512-bit wide universal intrinsics(WIP): fixed 512-wide universal intrinsics based resize * Added implementation of 512-bit wide universal intrinsics(WIP): fixed findContours by avoiding use of uint64 dependent 512-wide v_signmask() * Added implementation of 512-bit wide universal intrinsics(WIP): fixed trailing whitespaces * Added implementation of 512-bit wide universal intrinsics(WIP): reworked specific intrinsic sets dependent parts to check availability of intrinsics based on CPU feature group defines * Added implementation of 512-bit wide universal intrinsics(WIP):Updated AVX512 implementation of v_popcount to avoid AVX512VPOPCNTDQ intrinsics if unavailable. * Added implementation of 512-bit wide universal intrinsics(WIP): Fixed universal intrinsics data initialisation, v_mul_wrap, v_floor, v_ceil and v_signmask. * Added implementation of 512-bit wide universal intrinsics(WIP): Removed hasSIMD512() * Added implementation of 512-bit wide universal intrinsics(WIP): Fixes for gcc build * Added implementation of 512-bit wide universal intrinsics(WIP): Reworked v_signmask, v_check_any() and v_check_all() implementation.
1884 lines
59 KiB
C++
1884 lines
59 KiB
C++
/*M///////////////////////////////////////////////////////////////////////////////////////
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//
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// IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
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//
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// By downloading, copying, installing or using the software you agree to this license.
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// If you do not agree to this license, do not download, install,
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// copy or use the software.
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//
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//
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// Intel License Agreement
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// For Open Source Computer Vision Library
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//
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// Copyright (C) 2000, Intel Corporation, all rights reserved.
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// Third party copyrights are property of their respective owners.
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//
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// Redistribution and use in source and binary forms, with or without modification,
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// are permitted provided that the following conditions are met:
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//
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// * Redistribution's of source code must retain the above copyright notice,
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// this list of conditions and the following disclaimer.
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//
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// * Redistribution's in binary form must reproduce the above copyright notice,
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// this list of conditions and the following disclaimer in the documentation
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// and/or other materials provided with the distribution.
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//
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// * The name of Intel Corporation may not be used to endorse or promote products
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// derived from this software without specific prior written permission.
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//
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// This software is provided by the copyright holders and contributors "as is" and
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// any express or implied warranties, including, but not limited to, the implied
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// warranties of merchantability and fitness for a particular purpose are disclaimed.
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// In no event shall the Intel Corporation or contributors be liable for any direct,
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// indirect, incidental, special, exemplary, or consequential damages
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// (including, but not limited to, procurement of substitute goods or services;
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// loss of use, data, or profits; or business interruption) however caused
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// and on any theory of liability, whether in contract, strict liability,
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// or tort (including negligence or otherwise) arising in any way out of
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// the use of this software, even if advised of the possibility of such damage.
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//
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//M*/
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#include "precomp.hpp"
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#include "opencv2/core/hal/intrin.hpp"
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using namespace cv;
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/* initializes 8-element array for fast access to 3x3 neighborhood of a pixel */
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#define CV_INIT_3X3_DELTAS( deltas, step, nch ) \
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((deltas)[0] = (nch), (deltas)[1] = -(step) + (nch), \
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(deltas)[2] = -(step), (deltas)[3] = -(step) - (nch), \
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(deltas)[4] = -(nch), (deltas)[5] = (step) - (nch), \
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(deltas)[6] = (step), (deltas)[7] = (step) + (nch))
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static const CvPoint icvCodeDeltas[8] =
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{ {1, 0}, {1, -1}, {0, -1}, {-1, -1}, {-1, 0}, {-1, 1}, {0, 1}, {1, 1} };
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CV_IMPL void
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cvStartReadChainPoints( CvChain * chain, CvChainPtReader * reader )
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{
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int i;
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if( !chain || !reader )
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CV_Error( CV_StsNullPtr, "" );
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if( chain->elem_size != 1 || chain->header_size < (int)sizeof(CvChain))
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CV_Error( CV_StsBadSize, "" );
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cvStartReadSeq( (CvSeq *) chain, (CvSeqReader *) reader, 0 );
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reader->pt = chain->origin;
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for( i = 0; i < 8; i++ )
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{
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reader->deltas[i][0] = (schar) icvCodeDeltas[i].x;
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reader->deltas[i][1] = (schar) icvCodeDeltas[i].y;
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}
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}
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/* retrieves next point of the chain curve and updates reader */
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CV_IMPL CvPoint
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cvReadChainPoint( CvChainPtReader * reader )
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{
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if( !reader )
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CV_Error( CV_StsNullPtr, "" );
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cv::Point2i pt = reader->pt;
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schar *ptr = reader->ptr;
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if (ptr)
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{
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int code = *ptr++;
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if( ptr >= reader->block_max )
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{
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cvChangeSeqBlock( (CvSeqReader *) reader, 1 );
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ptr = reader->ptr;
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}
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reader->ptr = ptr;
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reader->code = (schar)code;
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assert( (code & ~7) == 0 );
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reader->pt.x = pt.x + icvCodeDeltas[code].x;
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reader->pt.y = pt.y + icvCodeDeltas[code].y;
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}
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return cvPoint(pt);
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}
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/****************************************************************************************\
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* Raster->Chain Tree (Suzuki algorithms) *
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\****************************************************************************************/
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typedef struct _CvContourInfo
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{
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int flags;
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struct _CvContourInfo *next; /* next contour with the same mark value */
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struct _CvContourInfo *parent; /* information about parent contour */
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CvSeq *contour; /* corresponding contour (may be 0, if rejected) */
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CvRect rect; /* bounding rectangle */
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CvPoint origin; /* origin point (where the contour was traced from) */
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int is_hole; /* hole flag */
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}
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_CvContourInfo;
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/*
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Structure that is used for sequential retrieving contours from the image.
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It supports both hierarchical and plane variants of Suzuki algorithm.
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*/
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typedef struct _CvContourScanner
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{
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CvMemStorage *storage1; /* contains fetched contours */
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CvMemStorage *storage2; /* contains approximated contours
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(!=storage1 if approx_method2 != approx_method1) */
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CvMemStorage *cinfo_storage; /* contains _CvContourInfo nodes */
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CvSet *cinfo_set; /* set of _CvContourInfo nodes */
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CvMemStoragePos initial_pos; /* starting storage pos */
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CvMemStoragePos backup_pos; /* beginning of the latest approx. contour */
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CvMemStoragePos backup_pos2; /* ending of the latest approx. contour */
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schar *img0; /* image origin */
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schar *img; /* current image row */
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int img_step; /* image step */
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CvSize img_size; /* ROI size */
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CvPoint offset; /* ROI offset: coordinates, added to each contour point */
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CvPoint pt; /* current scanner position */
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CvPoint lnbd; /* position of the last met contour */
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int nbd; /* current mark val */
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_CvContourInfo *l_cinfo; /* information about latest approx. contour */
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_CvContourInfo cinfo_temp; /* temporary var which is used in simple modes */
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_CvContourInfo frame_info; /* information about frame */
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CvSeq frame; /* frame itself */
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int approx_method1; /* approx method when tracing */
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int approx_method2; /* final approx method */
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int mode; /* contour scanning mode:
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0 - external only
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1 - all the contours w/o any hierarchy
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2 - connected components (i.e. two-level structure -
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external contours and holes),
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3 - full hierarchy;
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4 - connected components of a multi-level image
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*/
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int subst_flag;
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int seq_type1; /* type of fetched contours */
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int header_size1; /* hdr size of fetched contours */
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int elem_size1; /* elem size of fetched contours */
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int seq_type2; /* */
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int header_size2; /* the same for approx. contours */
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int elem_size2; /* */
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_CvContourInfo *cinfo_table[128];
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}
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_CvContourScanner;
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#define _CV_FIND_CONTOURS_FLAGS_EXTERNAL_ONLY 1
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#define _CV_FIND_CONTOURS_FLAGS_HIERARCHIC 2
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/*
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Initializes scanner structure.
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Prepare image for scanning ( clear borders and convert all pixels to 0-1.
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*/
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static CvContourScanner
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cvStartFindContours_Impl( void* _img, CvMemStorage* storage,
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int header_size, int mode,
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int method, CvPoint offset, int needFillBorder )
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{
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if( !storage )
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CV_Error( CV_StsNullPtr, "" );
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CvMat stub, *mat = cvGetMat( _img, &stub );
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if( CV_MAT_TYPE(mat->type) == CV_32SC1 && mode == CV_RETR_CCOMP )
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mode = CV_RETR_FLOODFILL;
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if( !((CV_IS_MASK_ARR( mat ) && mode < CV_RETR_FLOODFILL) ||
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(CV_MAT_TYPE(mat->type) == CV_32SC1 && mode == CV_RETR_FLOODFILL)) )
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CV_Error( CV_StsUnsupportedFormat,
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"[Start]FindContours supports only CV_8UC1 images when mode != CV_RETR_FLOODFILL "
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"otherwise supports CV_32SC1 images only" );
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CvSize size = cvSize( mat->width, mat->height );
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int step = mat->step;
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uchar* img = (uchar*)(mat->data.ptr);
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if( method < 0 || method > CV_CHAIN_APPROX_TC89_KCOS )
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CV_Error( CV_StsOutOfRange, "" );
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if( header_size < (int) (method == CV_CHAIN_CODE ? sizeof( CvChain ) : sizeof( CvContour )))
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CV_Error( CV_StsBadSize, "" );
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CvContourScanner scanner = (CvContourScanner)cvAlloc( sizeof( *scanner ));
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memset( scanner, 0, sizeof(*scanner) );
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scanner->storage1 = scanner->storage2 = storage;
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scanner->img0 = (schar *) img;
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scanner->img = (schar *) (img + step);
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scanner->img_step = step;
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scanner->img_size.width = size.width - 1; /* exclude rightest column */
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scanner->img_size.height = size.height - 1; /* exclude bottomost row */
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scanner->mode = mode;
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scanner->offset = offset;
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scanner->pt.x = scanner->pt.y = 1;
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scanner->lnbd.x = 0;
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scanner->lnbd.y = 1;
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scanner->nbd = 2;
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scanner->frame_info.contour = &(scanner->frame);
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scanner->frame_info.is_hole = 1;
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scanner->frame_info.next = 0;
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scanner->frame_info.parent = 0;
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scanner->frame_info.rect = cvRect( 0, 0, size.width, size.height );
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scanner->l_cinfo = 0;
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scanner->subst_flag = 0;
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scanner->frame.flags = CV_SEQ_FLAG_HOLE;
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scanner->approx_method2 = scanner->approx_method1 = method;
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if( method == CV_CHAIN_APPROX_TC89_L1 || method == CV_CHAIN_APPROX_TC89_KCOS )
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scanner->approx_method1 = CV_CHAIN_CODE;
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if( scanner->approx_method1 == CV_CHAIN_CODE )
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{
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scanner->seq_type1 = CV_SEQ_CHAIN_CONTOUR;
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scanner->header_size1 = scanner->approx_method1 == scanner->approx_method2 ?
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header_size : sizeof( CvChain );
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scanner->elem_size1 = sizeof( char );
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}
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else
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{
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scanner->seq_type1 = CV_SEQ_POLYGON;
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scanner->header_size1 = scanner->approx_method1 == scanner->approx_method2 ?
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header_size : sizeof( CvContour );
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scanner->elem_size1 = sizeof( CvPoint );
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}
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scanner->header_size2 = header_size;
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if( scanner->approx_method2 == CV_CHAIN_CODE )
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{
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scanner->seq_type2 = scanner->seq_type1;
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scanner->elem_size2 = scanner->elem_size1;
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}
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else
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{
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scanner->seq_type2 = CV_SEQ_POLYGON;
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scanner->elem_size2 = sizeof( CvPoint );
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}
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scanner->seq_type1 = scanner->approx_method1 == CV_CHAIN_CODE ?
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CV_SEQ_CHAIN_CONTOUR : CV_SEQ_POLYGON;
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scanner->seq_type2 = scanner->approx_method2 == CV_CHAIN_CODE ?
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CV_SEQ_CHAIN_CONTOUR : CV_SEQ_POLYGON;
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cvSaveMemStoragePos( storage, &(scanner->initial_pos) );
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if( method > CV_CHAIN_APPROX_SIMPLE )
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{
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scanner->storage1 = cvCreateChildMemStorage( scanner->storage2 );
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}
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if( mode > CV_RETR_LIST )
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{
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scanner->cinfo_storage = cvCreateChildMemStorage( scanner->storage2 );
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scanner->cinfo_set = cvCreateSet( 0, sizeof( CvSet ), sizeof( _CvContourInfo ),
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scanner->cinfo_storage );
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}
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CV_Assert(step >= 0);
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CV_Assert(size.height >= 1);
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/* make zero borders */
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if(needFillBorder)
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{
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int esz = CV_ELEM_SIZE(mat->type);
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memset( img, 0, size.width*esz );
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memset( img + static_cast<size_t>(step) * (size.height - 1), 0, size.width*esz );
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img += step;
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for( int y = 1; y < size.height - 1; y++, img += step )
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{
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for( int k = 0; k < esz; k++ )
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img[k] = img[(size.width - 1)*esz + k] = (schar)0;
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}
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}
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/* converts all pixels to 0 or 1 */
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if( CV_MAT_TYPE(mat->type) != CV_32S )
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cvThreshold( mat, mat, 0, 1, CV_THRESH_BINARY );
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return scanner;
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}
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CV_IMPL CvContourScanner
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cvStartFindContours( void* _img, CvMemStorage* storage,
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int header_size, int mode,
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int method, CvPoint offset )
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{
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return cvStartFindContours_Impl(_img, storage, header_size, mode, method, offset, 1);
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}
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/*
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Final stage of contour processing.
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Three variants possible:
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1. Contour, which was retrieved using border following, is added to
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the contour tree. It is the case when the icvSubstituteContour function
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was not called after retrieving the contour.
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2. New contour, assigned by icvSubstituteContour function, is added to the
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tree. The retrieved contour itself is removed from the storage.
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Here two cases are possible:
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2a. If one deals with plane variant of algorithm
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(hierarchical structure is not reconstructed),
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the contour is removed completely.
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2b. In hierarchical case, the header of the contour is not removed.
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It's marked as "link to contour" and h_next pointer of it is set to
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new, substituting contour.
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3. The similar to 2, but when NULL pointer was assigned by
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icvSubstituteContour function. In this case, the function removes
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retrieved contour completely if plane case and
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leaves header if hierarchical (but doesn't mark header as "link").
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------------------------------------------------------------------------
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The 1st variant can be used to retrieve and store all the contours from the image
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(with optional conversion from chains to contours using some approximation from
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restricted set of methods). Some characteristics of contour can be computed in the
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same pass.
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The usage scheme can look like:
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icvContourScanner scanner;
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CvMemStorage* contour_storage;
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CvSeq* first_contour;
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CvStatus result;
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...
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icvCreateMemStorage( &contour_storage, block_size/0 );
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...
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cvStartFindContours
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( img, contour_storage,
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header_size, approx_method,
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[external_only,]
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&scanner );
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for(;;)
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{
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[CvSeq* contour;]
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result = icvFindNextContour( &scanner, &contour/0 );
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if( result != CV_OK ) break;
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|
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// calculate some characteristics
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...
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}
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if( result < 0 ) goto error_processing;
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cvEndFindContours( &scanner, &first_contour );
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...
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|
|
|
-----------------------------------------------------------------
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|
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Second variant is more complex and can be used when someone wants store not
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the retrieved contours but transformed ones. (e.g. approximated with some
|
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non-default algorithm ).
|
|
|
|
The scheme can be the as following:
|
|
|
|
icvContourScanner scanner;
|
|
CvMemStorage* contour_storage;
|
|
CvMemStorage* temp_storage;
|
|
CvSeq* first_contour;
|
|
CvStatus result;
|
|
|
|
...
|
|
|
|
icvCreateMemStorage( &contour_storage, block_size/0 );
|
|
icvCreateMemStorage( &temp_storage, block_size/0 );
|
|
|
|
...
|
|
|
|
icvStartFindContours8uC1R
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|
( <img_params>, temp_storage,
|
|
header_size, approx_method,
|
|
[retrival_mode],
|
|
&scanner );
|
|
|
|
for(;;)
|
|
{
|
|
CvSeq* temp_contour;
|
|
CvSeq* new_contour;
|
|
result = icvFindNextContour( scanner, &temp_contour );
|
|
|
|
if( result != CV_OK ) break;
|
|
|
|
<approximation_function>( temp_contour, contour_storage,
|
|
&new_contour, <parameters...> );
|
|
|
|
icvSubstituteContour( scanner, new_contour );
|
|
...
|
|
}
|
|
|
|
if( result < 0 ) goto error_processing;
|
|
|
|
cvEndFindContours( &scanner, &first_contour );
|
|
...
|
|
|
|
----------------------------------------------------------------------------
|
|
Third method to retrieve contours may be applied if contours are irrelevant
|
|
themselves but some characteristics of them are used only.
|
|
The usage is similar to second except slightly different internal loop
|
|
|
|
for(;;)
|
|
{
|
|
CvSeq* temp_contour;
|
|
result = icvFindNextContour( &scanner, &temp_contour );
|
|
|
|
if( result != CV_OK ) break;
|
|
|
|
// calculate some characteristics of temp_contour
|
|
|
|
icvSubstituteContour( scanner, 0 );
|
|
...
|
|
}
|
|
|
|
new_storage variable is not needed here.
|
|
|
|
Note, that the second and the third methods can interleave. I.e. it is possible to
|
|
retain contours that satisfy with some criteria and reject others.
|
|
In hierarchic case the resulting tree is the part of original tree with
|
|
some nodes absent. But in the resulting tree the contour1 is a child
|
|
(may be indirect) of contour2 iff in the original tree the contour1
|
|
is a child (may be indirect) of contour2.
|
|
*/
|
|
static void
|
|
icvEndProcessContour( CvContourScanner scanner )
|
|
{
|
|
_CvContourInfo *l_cinfo = scanner->l_cinfo;
|
|
|
|
if( l_cinfo )
|
|
{
|
|
if( scanner->subst_flag )
|
|
{
|
|
CvMemStoragePos temp;
|
|
|
|
cvSaveMemStoragePos( scanner->storage2, &temp );
|
|
|
|
if( temp.top == scanner->backup_pos2.top &&
|
|
temp.free_space == scanner->backup_pos2.free_space )
|
|
{
|
|
cvRestoreMemStoragePos( scanner->storage2, &scanner->backup_pos );
|
|
}
|
|
scanner->subst_flag = 0;
|
|
}
|
|
|
|
if( l_cinfo->contour )
|
|
{
|
|
cvInsertNodeIntoTree( l_cinfo->contour, l_cinfo->parent->contour,
|
|
&(scanner->frame) );
|
|
}
|
|
scanner->l_cinfo = 0;
|
|
}
|
|
}
|
|
|
|
/* replaces one contour with another */
|
|
CV_IMPL void
|
|
cvSubstituteContour( CvContourScanner scanner, CvSeq * new_contour )
|
|
{
|
|
_CvContourInfo *l_cinfo;
|
|
|
|
if( !scanner )
|
|
CV_Error( CV_StsNullPtr, "" );
|
|
|
|
l_cinfo = scanner->l_cinfo;
|
|
if( l_cinfo && l_cinfo->contour && l_cinfo->contour != new_contour )
|
|
{
|
|
l_cinfo->contour = new_contour;
|
|
scanner->subst_flag = 1;
|
|
}
|
|
}
|
|
|
|
static const int MAX_SIZE = 16;
|
|
|
|
/*
|
|
marks domain border with +/-<constant> and stores the contour into CvSeq.
|
|
method:
|
|
<0 - chain
|
|
==0 - direct
|
|
>0 - simple approximation
|
|
*/
|
|
static void
|
|
icvFetchContour( schar *ptr,
|
|
int step,
|
|
CvPoint pt,
|
|
CvSeq* contour,
|
|
int _method )
|
|
{
|
|
const schar nbd = 2;
|
|
int deltas[MAX_SIZE];
|
|
CvSeqWriter writer;
|
|
schar *i0 = ptr, *i1, *i3, *i4 = 0;
|
|
int prev_s = -1, s, s_end;
|
|
int method = _method - 1;
|
|
|
|
CV_DbgAssert( (unsigned) _method <= CV_CHAIN_APPROX_SIMPLE );
|
|
|
|
/* initialize local state */
|
|
CV_INIT_3X3_DELTAS( deltas, step, 1 );
|
|
memcpy( deltas + 8, deltas, 8 * sizeof( deltas[0] ));
|
|
|
|
/* initialize writer */
|
|
cvStartAppendToSeq( contour, &writer );
|
|
|
|
if( method < 0 )
|
|
((CvChain *) contour)->origin = pt;
|
|
|
|
s_end = s = CV_IS_SEQ_HOLE( contour ) ? 0 : 4;
|
|
|
|
do
|
|
{
|
|
s = (s - 1) & 7;
|
|
i1 = i0 + deltas[s];
|
|
}
|
|
while( *i1 == 0 && s != s_end );
|
|
|
|
if( s == s_end ) /* single pixel domain */
|
|
{
|
|
*i0 = (schar) (nbd | -128);
|
|
if( method >= 0 )
|
|
{
|
|
CV_WRITE_SEQ_ELEM( pt, writer );
|
|
}
|
|
}
|
|
else
|
|
{
|
|
i3 = i0;
|
|
prev_s = s ^ 4;
|
|
|
|
/* follow border */
|
|
for( ;; )
|
|
{
|
|
CV_Assert(i3 != NULL);
|
|
s_end = s;
|
|
s = std::min(s, MAX_SIZE - 1);
|
|
|
|
while( s < MAX_SIZE - 1 )
|
|
{
|
|
i4 = i3 + deltas[++s];
|
|
CV_Assert(i4 != NULL);
|
|
if( *i4 != 0 )
|
|
break;
|
|
}
|
|
s &= 7;
|
|
|
|
/* check "right" bound */
|
|
if( (unsigned) (s - 1) < (unsigned) s_end )
|
|
{
|
|
*i3 = (schar) (nbd | -128);
|
|
}
|
|
else if( *i3 == 1 )
|
|
{
|
|
*i3 = nbd;
|
|
}
|
|
|
|
if( method < 0 )
|
|
{
|
|
schar _s = (schar) s;
|
|
|
|
CV_WRITE_SEQ_ELEM( _s, writer );
|
|
}
|
|
else
|
|
{
|
|
if( s != prev_s || method == 0 )
|
|
{
|
|
CV_WRITE_SEQ_ELEM( pt, writer );
|
|
prev_s = s;
|
|
}
|
|
|
|
pt.x += icvCodeDeltas[s].x;
|
|
pt.y += icvCodeDeltas[s].y;
|
|
|
|
}
|
|
|
|
if( i4 == i0 && i3 == i1 )
|
|
break;
|
|
|
|
i3 = i4;
|
|
s = (s + 4) & 7;
|
|
} /* end of border following loop */
|
|
}
|
|
|
|
cvEndWriteSeq( &writer );
|
|
|
|
if( _method != CV_CHAIN_CODE )
|
|
cvBoundingRect( contour, 1 );
|
|
|
|
CV_DbgAssert( (writer.seq->total == 0 && writer.seq->first == 0) ||
|
|
writer.seq->total > writer.seq->first->count ||
|
|
(writer.seq->first->prev == writer.seq->first &&
|
|
writer.seq->first->next == writer.seq->first) );
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
trace contour until certain point is met.
|
|
returns 1 if met, 0 else.
|
|
*/
|
|
static int
|
|
icvTraceContour( schar *ptr, int step, schar *stop_ptr, int is_hole )
|
|
{
|
|
int deltas[MAX_SIZE];
|
|
schar *i0 = ptr, *i1, *i3, *i4 = NULL;
|
|
int s, s_end;
|
|
|
|
/* initialize local state */
|
|
CV_INIT_3X3_DELTAS( deltas, step, 1 );
|
|
memcpy( deltas + 8, deltas, 8 * sizeof( deltas[0] ));
|
|
|
|
CV_DbgAssert( (*i0 & -2) != 0 );
|
|
|
|
s_end = s = is_hole ? 0 : 4;
|
|
|
|
do
|
|
{
|
|
s = (s - 1) & 7;
|
|
i1 = i0 + deltas[s];
|
|
}
|
|
while( *i1 == 0 && s != s_end );
|
|
|
|
i3 = i0;
|
|
|
|
/* check single pixel domain */
|
|
if( s != s_end )
|
|
{
|
|
/* follow border */
|
|
for( ;; )
|
|
{
|
|
CV_Assert(i3 != NULL);
|
|
|
|
s = std::min(s, MAX_SIZE - 1);
|
|
while( s < MAX_SIZE - 1 )
|
|
{
|
|
i4 = i3 + deltas[++s];
|
|
CV_Assert(i4 != NULL);
|
|
if( *i4 != 0 )
|
|
break;
|
|
}
|
|
|
|
if( i3 == stop_ptr || (i4 == i0 && i3 == i1) )
|
|
break;
|
|
|
|
i3 = i4;
|
|
s = (s + 4) & 7;
|
|
} /* end of border following loop */
|
|
}
|
|
return i3 == stop_ptr;
|
|
}
|
|
|
|
|
|
static void
|
|
icvFetchContourEx( schar* ptr,
|
|
int step,
|
|
CvPoint pt,
|
|
CvSeq* contour,
|
|
int _method,
|
|
int nbd,
|
|
CvRect* _rect )
|
|
{
|
|
int deltas[MAX_SIZE];
|
|
CvSeqWriter writer;
|
|
schar *i0 = ptr, *i1, *i3, *i4 = NULL;
|
|
cv::Rect rect;
|
|
int prev_s = -1, s, s_end;
|
|
int method = _method - 1;
|
|
|
|
CV_DbgAssert( (unsigned) _method <= CV_CHAIN_APPROX_SIMPLE );
|
|
CV_DbgAssert( 1 < nbd && nbd < 128 );
|
|
|
|
/* initialize local state */
|
|
CV_INIT_3X3_DELTAS( deltas, step, 1 );
|
|
memcpy( deltas + 8, deltas, 8 * sizeof( deltas[0] ));
|
|
|
|
/* initialize writer */
|
|
cvStartAppendToSeq( contour, &writer );
|
|
|
|
if( method < 0 )
|
|
((CvChain *)contour)->origin = pt;
|
|
|
|
rect.x = rect.width = pt.x;
|
|
rect.y = rect.height = pt.y;
|
|
|
|
s_end = s = CV_IS_SEQ_HOLE( contour ) ? 0 : 4;
|
|
|
|
do
|
|
{
|
|
s = (s - 1) & 7;
|
|
i1 = i0 + deltas[s];
|
|
}
|
|
while( *i1 == 0 && s != s_end );
|
|
|
|
if( s == s_end ) /* single pixel domain */
|
|
{
|
|
*i0 = (schar) (nbd | 0x80);
|
|
if( method >= 0 )
|
|
{
|
|
CV_WRITE_SEQ_ELEM( pt, writer );
|
|
}
|
|
}
|
|
else
|
|
{
|
|
i3 = i0;
|
|
|
|
prev_s = s ^ 4;
|
|
|
|
/* follow border */
|
|
for( ;; )
|
|
{
|
|
CV_Assert(i3 != NULL);
|
|
s_end = s;
|
|
s = std::min(s, MAX_SIZE - 1);
|
|
|
|
while( s < MAX_SIZE - 1 )
|
|
{
|
|
i4 = i3 + deltas[++s];
|
|
CV_Assert(i4 != NULL);
|
|
if( *i4 != 0 )
|
|
break;
|
|
}
|
|
s &= 7;
|
|
|
|
/* check "right" bound */
|
|
if( (unsigned) (s - 1) < (unsigned) s_end )
|
|
{
|
|
*i3 = (schar) (nbd | 0x80);
|
|
}
|
|
else if( *i3 == 1 )
|
|
{
|
|
*i3 = (schar) nbd;
|
|
}
|
|
|
|
if( method < 0 )
|
|
{
|
|
schar _s = (schar) s;
|
|
CV_WRITE_SEQ_ELEM( _s, writer );
|
|
}
|
|
else if( s != prev_s || method == 0 )
|
|
{
|
|
CV_WRITE_SEQ_ELEM( pt, writer );
|
|
}
|
|
|
|
if( s != prev_s )
|
|
{
|
|
/* update bounds */
|
|
if( pt.x < rect.x )
|
|
rect.x = pt.x;
|
|
else if( pt.x > rect.width )
|
|
rect.width = pt.x;
|
|
|
|
if( pt.y < rect.y )
|
|
rect.y = pt.y;
|
|
else if( pt.y > rect.height )
|
|
rect.height = pt.y;
|
|
}
|
|
|
|
prev_s = s;
|
|
pt.x += icvCodeDeltas[s].x;
|
|
pt.y += icvCodeDeltas[s].y;
|
|
|
|
if( i4 == i0 && i3 == i1 ) break;
|
|
|
|
i3 = i4;
|
|
s = (s + 4) & 7;
|
|
} /* end of border following loop */
|
|
}
|
|
|
|
rect.width -= rect.x - 1;
|
|
rect.height -= rect.y - 1;
|
|
|
|
cvEndWriteSeq( &writer );
|
|
|
|
if( _method != CV_CHAIN_CODE )
|
|
((CvContour*)contour)->rect = cvRect(rect);
|
|
|
|
CV_DbgAssert( (writer.seq->total == 0 && writer.seq->first == 0) ||
|
|
writer.seq->total > writer.seq->first->count ||
|
|
(writer.seq->first->prev == writer.seq->first &&
|
|
writer.seq->first->next == writer.seq->first) );
|
|
|
|
if( _rect ) *_rect = cvRect(rect);
|
|
}
|
|
|
|
|
|
static int
|
|
icvTraceContour_32s( int *ptr, int step, int *stop_ptr, int is_hole )
|
|
{
|
|
CV_Assert(ptr != NULL);
|
|
int deltas[MAX_SIZE];
|
|
int *i0 = ptr, *i1, *i3, *i4 = NULL;
|
|
int s, s_end;
|
|
const int right_flag = INT_MIN;
|
|
const int new_flag = (int)((unsigned)INT_MIN >> 1);
|
|
const int value_mask = ~(right_flag | new_flag);
|
|
const int ccomp_val = *i0 & value_mask;
|
|
|
|
/* initialize local state */
|
|
CV_INIT_3X3_DELTAS( deltas, step, 1 );
|
|
memcpy( deltas + 8, deltas, 8 * sizeof( deltas[0] ));
|
|
|
|
s_end = s = is_hole ? 0 : 4;
|
|
|
|
do
|
|
{
|
|
s = (s - 1) & 7;
|
|
i1 = i0 + deltas[s];
|
|
}
|
|
while( (*i1 & value_mask) != ccomp_val && s != s_end );
|
|
|
|
i3 = i0;
|
|
|
|
/* check single pixel domain */
|
|
if( s != s_end )
|
|
{
|
|
/* follow border */
|
|
for( ;; )
|
|
{
|
|
CV_Assert(i3 != NULL);
|
|
s = std::min(s, MAX_SIZE - 1);
|
|
|
|
while( s < MAX_SIZE - 1 )
|
|
{
|
|
i4 = i3 + deltas[++s];
|
|
CV_Assert(i4 != NULL);
|
|
if( (*i4 & value_mask) == ccomp_val )
|
|
break;
|
|
}
|
|
|
|
if( i3 == stop_ptr || (i4 == i0 && i3 == i1) )
|
|
break;
|
|
|
|
i3 = i4;
|
|
s = (s + 4) & 7;
|
|
} /* end of border following loop */
|
|
}
|
|
return i3 == stop_ptr;
|
|
}
|
|
|
|
|
|
static void
|
|
icvFetchContourEx_32s( int* ptr,
|
|
int step,
|
|
CvPoint pt,
|
|
CvSeq* contour,
|
|
int _method,
|
|
CvRect* _rect )
|
|
{
|
|
CV_Assert(ptr != NULL);
|
|
int deltas[MAX_SIZE];
|
|
CvSeqWriter writer;
|
|
int *i0 = ptr, *i1, *i3, *i4;
|
|
cv::Rect rect;
|
|
int prev_s = -1, s, s_end;
|
|
int method = _method - 1;
|
|
const int right_flag = INT_MIN;
|
|
const int new_flag = (int)((unsigned)INT_MIN >> 1);
|
|
const int value_mask = ~(right_flag | new_flag);
|
|
const int ccomp_val = *i0 & value_mask;
|
|
const int nbd0 = ccomp_val | new_flag;
|
|
const int nbd1 = nbd0 | right_flag;
|
|
|
|
CV_DbgAssert( (unsigned) _method <= CV_CHAIN_APPROX_SIMPLE );
|
|
|
|
/* initialize local state */
|
|
CV_INIT_3X3_DELTAS( deltas, step, 1 );
|
|
memcpy( deltas + 8, deltas, 8 * sizeof( deltas[0] ));
|
|
|
|
/* initialize writer */
|
|
cvStartAppendToSeq( contour, &writer );
|
|
|
|
if( method < 0 )
|
|
((CvChain *)contour)->origin = pt;
|
|
|
|
rect.x = rect.width = pt.x;
|
|
rect.y = rect.height = pt.y;
|
|
|
|
s_end = s = CV_IS_SEQ_HOLE( contour ) ? 0 : 4;
|
|
|
|
do
|
|
{
|
|
s = (s - 1) & 7;
|
|
i1 = i0 + deltas[s];
|
|
}
|
|
while( (*i1 & value_mask) != ccomp_val && s != s_end && ( s < MAX_SIZE - 1 ) );
|
|
|
|
if( s == s_end ) /* single pixel domain */
|
|
{
|
|
*i0 = nbd1;
|
|
if( method >= 0 )
|
|
{
|
|
CV_WRITE_SEQ_ELEM( pt, writer );
|
|
}
|
|
}
|
|
else
|
|
{
|
|
i3 = i0;
|
|
prev_s = s ^ 4;
|
|
|
|
/* follow border */
|
|
for( ;; )
|
|
{
|
|
CV_Assert(i3 != NULL);
|
|
s_end = s;
|
|
|
|
do
|
|
{
|
|
i4 = i3 + deltas[++s];
|
|
CV_Assert(i4 != NULL);
|
|
}
|
|
while( (*i4 & value_mask) != ccomp_val && ( s < MAX_SIZE - 1 ) );
|
|
s &= 7;
|
|
|
|
/* check "right" bound */
|
|
if( (unsigned) (s - 1) < (unsigned) s_end )
|
|
{
|
|
*i3 = nbd1;
|
|
}
|
|
else if( *i3 == ccomp_val )
|
|
{
|
|
*i3 = nbd0;
|
|
}
|
|
|
|
if( method < 0 )
|
|
{
|
|
schar _s = (schar) s;
|
|
CV_WRITE_SEQ_ELEM( _s, writer );
|
|
}
|
|
else if( s != prev_s || method == 0 )
|
|
{
|
|
CV_WRITE_SEQ_ELEM( pt, writer );
|
|
}
|
|
|
|
if( s != prev_s )
|
|
{
|
|
/* update bounds */
|
|
if( pt.x < rect.x )
|
|
rect.x = pt.x;
|
|
else if( pt.x > rect.width )
|
|
rect.width = pt.x;
|
|
|
|
if( pt.y < rect.y )
|
|
rect.y = pt.y;
|
|
else if( pt.y > rect.height )
|
|
rect.height = pt.y;
|
|
}
|
|
|
|
prev_s = s;
|
|
pt.x += icvCodeDeltas[s].x;
|
|
pt.y += icvCodeDeltas[s].y;
|
|
|
|
if( i4 == i0 && i3 == i1 ) break;
|
|
|
|
i3 = i4;
|
|
s = (s + 4) & 7;
|
|
} /* end of border following loop */
|
|
}
|
|
|
|
rect.width -= rect.x - 1;
|
|
rect.height -= rect.y - 1;
|
|
|
|
cvEndWriteSeq( &writer );
|
|
|
|
if( _method != CV_CHAIN_CODE )
|
|
((CvContour*)contour)->rect = cvRect(rect);
|
|
|
|
CV_DbgAssert( (writer.seq->total == 0 && writer.seq->first == 0) ||
|
|
writer.seq->total > writer.seq->first->count ||
|
|
(writer.seq->first->prev == writer.seq->first &&
|
|
writer.seq->first->next == writer.seq->first) );
|
|
|
|
if (_rect) *_rect = cvRect(rect);
|
|
}
|
|
|
|
|
|
CvSeq *
|
|
cvFindNextContour( CvContourScanner scanner )
|
|
{
|
|
if( !scanner )
|
|
CV_Error( CV_StsNullPtr, "" );
|
|
|
|
CV_Assert(scanner->img_step >= 0);
|
|
|
|
icvEndProcessContour( scanner );
|
|
|
|
/* initialize local state */
|
|
schar* img0 = scanner->img0;
|
|
schar* img = scanner->img;
|
|
int step = scanner->img_step;
|
|
int step_i = step / sizeof(int);
|
|
int x = scanner->pt.x;
|
|
int y = scanner->pt.y;
|
|
int width = scanner->img_size.width;
|
|
int height = scanner->img_size.height;
|
|
int mode = scanner->mode;
|
|
cv::Point2i lnbd = scanner->lnbd;
|
|
int nbd = scanner->nbd;
|
|
int prev = img[x - 1];
|
|
int new_mask = -2;
|
|
|
|
if( mode == CV_RETR_FLOODFILL )
|
|
{
|
|
prev = ((int*)img)[x - 1];
|
|
new_mask = INT_MIN / 2;
|
|
}
|
|
|
|
for( ; y < height; y++, img += step )
|
|
{
|
|
int* img0_i = 0;
|
|
int* img_i = 0;
|
|
int p = 0;
|
|
|
|
if( mode == CV_RETR_FLOODFILL )
|
|
{
|
|
img0_i = (int*)img0;
|
|
img_i = (int*)img;
|
|
}
|
|
|
|
for( ; x < width; x++ )
|
|
{
|
|
if( img_i )
|
|
{
|
|
for( ; x < width && ((p = img_i[x]) == prev || (p & ~new_mask) == (prev & ~new_mask)); x++ )
|
|
prev = p;
|
|
}
|
|
else
|
|
{
|
|
#if CV_SIMD
|
|
if ((p = img[x]) != prev)
|
|
{
|
|
goto _next_contour;
|
|
}
|
|
else
|
|
{
|
|
#if CV_SIMD_WIDTH > 16
|
|
v_uint8 vx_prev = vx_setall_u8((uchar)prev);
|
|
while (x <= width - v_uint8::nlanes &&
|
|
v_check_all(vx_load((uchar*)(img + x)) == vx_prev))
|
|
x += v_uint8::nlanes;
|
|
#endif
|
|
v_uint8x16 v_prev = v_setall_u8((uchar)prev);
|
|
for (; x <= width - v_uint8x16::nlanes; x += v_uint8x16::nlanes)
|
|
{
|
|
unsigned int mask = (unsigned int)v_signmask(v_load((uchar*)(img + x)) != v_prev);
|
|
if (mask)
|
|
{
|
|
p = img[(x += cv::trailingZeros32(mask))];
|
|
goto _next_contour;
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
for( ; x < width && (p = img[x]) == prev; x++ )
|
|
;
|
|
}
|
|
|
|
if( x >= width )
|
|
break;
|
|
#if CV_SIMD
|
|
_next_contour:
|
|
#endif
|
|
{
|
|
_CvContourInfo *par_info = 0;
|
|
CvSeq *seq = 0;
|
|
int is_hole = 0;
|
|
cv::Point2i origin;
|
|
|
|
/* if not external contour */
|
|
if( (!img_i && !(prev == 0 && p == 1)) ||
|
|
(img_i && !(((prev & new_mask) != 0 || prev == 0) && (p & new_mask) == 0)) )
|
|
{
|
|
/* check hole */
|
|
if( (!img_i && (p != 0 || prev < 1)) ||
|
|
(img_i && ((prev & new_mask) != 0 || (p & new_mask) != 0)))
|
|
goto resume_scan;
|
|
|
|
if( prev & new_mask )
|
|
{
|
|
lnbd.x = x - 1;
|
|
}
|
|
is_hole = 1;
|
|
}
|
|
|
|
if( mode == 0 && (is_hole || img0[lnbd.y * static_cast<size_t>(step) + lnbd.x] > 0) )
|
|
goto resume_scan;
|
|
|
|
origin.y = y;
|
|
origin.x = x - is_hole;
|
|
|
|
/* find contour parent */
|
|
if( mode <= 1 || (!is_hole && (mode == CV_RETR_CCOMP || mode == CV_RETR_FLOODFILL)) || lnbd.x <= 0 )
|
|
{
|
|
par_info = &(scanner->frame_info);
|
|
}
|
|
else
|
|
{
|
|
int lval = (img0_i ?
|
|
img0_i[lnbd.y * static_cast<size_t>(step_i) + lnbd.x] :
|
|
(int)img0[lnbd.y * static_cast<size_t>(step) + lnbd.x]) & 0x7f;
|
|
_CvContourInfo *cur = scanner->cinfo_table[lval];
|
|
|
|
/* find the first bounding contour */
|
|
while( cur )
|
|
{
|
|
if( (unsigned) (lnbd.x - cur->rect.x) < (unsigned) cur->rect.width &&
|
|
(unsigned) (lnbd.y - cur->rect.y) < (unsigned) cur->rect.height )
|
|
{
|
|
if( par_info )
|
|
{
|
|
if( (img0_i &&
|
|
icvTraceContour_32s( img0_i + par_info->origin.y * static_cast<size_t>(step_i) +
|
|
par_info->origin.x, step_i, img_i + lnbd.x,
|
|
par_info->is_hole ) > 0) ||
|
|
(!img0_i &&
|
|
icvTraceContour( img0 + par_info->origin.y * static_cast<size_t>(step) +
|
|
par_info->origin.x, step, img + lnbd.x,
|
|
par_info->is_hole ) > 0) )
|
|
break;
|
|
}
|
|
par_info = cur;
|
|
}
|
|
cur = cur->next;
|
|
}
|
|
|
|
CV_Assert( par_info != 0 );
|
|
|
|
/* if current contour is a hole and previous contour is a hole or
|
|
current contour is external and previous contour is external then
|
|
the parent of the contour is the parent of the previous contour else
|
|
the parent is the previous contour itself. */
|
|
if( par_info->is_hole == is_hole )
|
|
{
|
|
par_info = par_info->parent;
|
|
/* every contour must have a parent
|
|
(at least, the frame of the image) */
|
|
if( !par_info )
|
|
par_info = &(scanner->frame_info);
|
|
}
|
|
|
|
/* hole flag of the parent must differ from the flag of the contour */
|
|
assert( par_info->is_hole != is_hole );
|
|
if( par_info->contour == 0 ) /* removed contour */
|
|
goto resume_scan;
|
|
}
|
|
|
|
lnbd.x = x - is_hole;
|
|
|
|
cvSaveMemStoragePos( scanner->storage2, &(scanner->backup_pos) );
|
|
|
|
seq = cvCreateSeq( scanner->seq_type1, scanner->header_size1,
|
|
scanner->elem_size1, scanner->storage1 );
|
|
seq->flags |= is_hole ? CV_SEQ_FLAG_HOLE : 0;
|
|
|
|
/* initialize header */
|
|
_CvContourInfo *l_cinfo = 0;
|
|
if( mode <= 1 )
|
|
{
|
|
l_cinfo = &(scanner->cinfo_temp);
|
|
icvFetchContour( img + x - is_hole, step,
|
|
cvPoint( origin.x + scanner->offset.x,
|
|
origin.y + scanner->offset.y),
|
|
seq, scanner->approx_method1 );
|
|
}
|
|
else
|
|
{
|
|
cvSetAdd(scanner->cinfo_set, 0, (CvSetElem**)&l_cinfo);
|
|
CV_Assert(l_cinfo);
|
|
int lval;
|
|
|
|
if( img_i )
|
|
{
|
|
lval = img_i[x - is_hole] & 127;
|
|
icvFetchContourEx_32s(img_i + x - is_hole, step_i,
|
|
cvPoint( origin.x + scanner->offset.x,
|
|
origin.y + scanner->offset.y),
|
|
seq, scanner->approx_method1,
|
|
&(l_cinfo->rect) );
|
|
}
|
|
else
|
|
{
|
|
lval = nbd;
|
|
// change nbd
|
|
nbd = (nbd + 1) & 127;
|
|
nbd += nbd == 0 ? 3 : 0;
|
|
icvFetchContourEx( img + x - is_hole, step,
|
|
cvPoint( origin.x + scanner->offset.x,
|
|
origin.y + scanner->offset.y),
|
|
seq, scanner->approx_method1,
|
|
lval, &(l_cinfo->rect) );
|
|
}
|
|
l_cinfo->rect.x -= scanner->offset.x;
|
|
l_cinfo->rect.y -= scanner->offset.y;
|
|
|
|
l_cinfo->next = scanner->cinfo_table[lval];
|
|
scanner->cinfo_table[lval] = l_cinfo;
|
|
}
|
|
|
|
l_cinfo->is_hole = is_hole;
|
|
l_cinfo->contour = seq;
|
|
l_cinfo->origin = cvPoint(origin);
|
|
l_cinfo->parent = par_info;
|
|
|
|
if( scanner->approx_method1 != scanner->approx_method2 )
|
|
{
|
|
l_cinfo->contour = icvApproximateChainTC89( (CvChain *) seq,
|
|
scanner->header_size2,
|
|
scanner->storage2,
|
|
scanner->approx_method2 );
|
|
cvClearMemStorage( scanner->storage1 );
|
|
}
|
|
|
|
l_cinfo->contour->v_prev = l_cinfo->parent->contour;
|
|
|
|
if( par_info->contour == 0 )
|
|
{
|
|
l_cinfo->contour = 0;
|
|
if( scanner->storage1 == scanner->storage2 )
|
|
{
|
|
cvRestoreMemStoragePos( scanner->storage1, &(scanner->backup_pos) );
|
|
}
|
|
else
|
|
{
|
|
cvClearMemStorage( scanner->storage1 );
|
|
}
|
|
p = img[x];
|
|
goto resume_scan;
|
|
}
|
|
|
|
cvSaveMemStoragePos( scanner->storage2, &(scanner->backup_pos2) );
|
|
scanner->l_cinfo = l_cinfo;
|
|
scanner->pt.x = !img_i ? x + 1 : x + 1 - is_hole;
|
|
scanner->pt.y = y;
|
|
scanner->lnbd = cvPoint(lnbd);
|
|
scanner->img = (schar *) img;
|
|
scanner->nbd = nbd;
|
|
return l_cinfo->contour;
|
|
}
|
|
resume_scan:
|
|
{
|
|
prev = p;
|
|
/* update lnbd */
|
|
if( prev & -2 )
|
|
{
|
|
lnbd.x = x;
|
|
}
|
|
}
|
|
} /* end of loop on x */
|
|
|
|
lnbd.x = 0;
|
|
lnbd.y = y + 1;
|
|
x = 1;
|
|
prev = 0;
|
|
} /* end of loop on y */
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*
|
|
The function add to tree the last retrieved/substituted contour,
|
|
releases temp_storage, restores state of dst_storage (if needed), and
|
|
returns pointer to root of the contour tree */
|
|
CV_IMPL CvSeq *
|
|
cvEndFindContours( CvContourScanner * _scanner )
|
|
{
|
|
CvContourScanner scanner;
|
|
CvSeq *first = 0;
|
|
|
|
if( !_scanner )
|
|
CV_Error( CV_StsNullPtr, "" );
|
|
scanner = *_scanner;
|
|
|
|
if( scanner )
|
|
{
|
|
icvEndProcessContour( scanner );
|
|
|
|
if( scanner->storage1 != scanner->storage2 )
|
|
cvReleaseMemStorage( &(scanner->storage1) );
|
|
|
|
if( scanner->cinfo_storage )
|
|
cvReleaseMemStorage( &(scanner->cinfo_storage) );
|
|
|
|
first = scanner->frame.v_next;
|
|
cvFree( _scanner );
|
|
}
|
|
|
|
return first;
|
|
}
|
|
|
|
|
|
#define ICV_SINGLE 0
|
|
#define ICV_CONNECTING_ABOVE 1
|
|
#define ICV_CONNECTING_BELOW -1
|
|
|
|
#define CV_GET_WRITTEN_ELEM( writer ) ((writer).ptr - (writer).seq->elem_size)
|
|
|
|
typedef struct CvLinkedRunPoint
|
|
{
|
|
struct CvLinkedRunPoint* link;
|
|
struct CvLinkedRunPoint* next;
|
|
CvPoint pt;
|
|
}
|
|
CvLinkedRunPoint;
|
|
|
|
inline int findStartContourPoint(uchar *src_data, CvSize img_size, int j)
|
|
{
|
|
#if CV_SIMD
|
|
#if CV_SIMD_WIDTH > 16
|
|
v_uint8 vx_zero = vx_setzero_u8();
|
|
while (j <= img_size.width - v_uint8::nlanes &&
|
|
v_check_all(vx_load((uchar*)(src_data + j)) == vx_zero))
|
|
j += v_uint8::nlanes;
|
|
#endif
|
|
v_uint8x16 v_zero = v_setzero_u8();
|
|
for (; j <= img_size.width - v_uint8x16::nlanes; j += v_uint8x16::nlanes)
|
|
{
|
|
unsigned int mask = (unsigned int)v_signmask(v_load((uchar*)(src_data + j)) != v_zero);
|
|
if (mask)
|
|
{
|
|
j += cv::trailingZeros32(mask);
|
|
return j;
|
|
}
|
|
}
|
|
#endif
|
|
for (; j < img_size.width && !src_data[j]; ++j)
|
|
;
|
|
return j;
|
|
}
|
|
|
|
inline int findEndContourPoint(uchar *src_data, CvSize img_size, int j)
|
|
{
|
|
#if CV_SIMD
|
|
if (j < img_size.width && !src_data[j])
|
|
{
|
|
return j;
|
|
}
|
|
else
|
|
{
|
|
#if CV_SIMD_WIDTH > 16
|
|
v_uint8 vx_zero = vx_setzero_u8();
|
|
while (j <= img_size.width - v_uint8::nlanes &&
|
|
v_check_all(vx_load((uchar*)(src_data + j)) != vx_zero))
|
|
j += v_uint8::nlanes;
|
|
#endif
|
|
v_uint8x16 v_zero = v_setzero_u8();
|
|
for (; j <= img_size.width - v_uint8::nlanes; j += v_uint8::nlanes)
|
|
{
|
|
unsigned int mask = (unsigned int)v_signmask(v_load((uchar*)(src_data + j)) == v_zero);
|
|
if (mask)
|
|
{
|
|
j += cv::trailingZeros32(mask);
|
|
return j;
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
for (; j < img_size.width && src_data[j]; ++j)
|
|
;
|
|
|
|
return j;
|
|
}
|
|
|
|
static int
|
|
icvFindContoursInInterval( const CvArr* src,
|
|
/*int minValue, int maxValue,*/
|
|
CvMemStorage* storage,
|
|
CvSeq** result,
|
|
int contourHeaderSize )
|
|
{
|
|
int count = 0;
|
|
cv::Ptr<CvMemStorage> storage00;
|
|
cv::Ptr<CvMemStorage> storage01;
|
|
CvSeq* first = 0;
|
|
|
|
int j, k, n;
|
|
|
|
uchar* src_data = 0;
|
|
int img_step = 0;
|
|
cv::Size img_size;
|
|
|
|
int connect_flag;
|
|
int lower_total;
|
|
int upper_total;
|
|
int all_total;
|
|
|
|
CvSeq* runs;
|
|
CvLinkedRunPoint tmp;
|
|
CvLinkedRunPoint* tmp_prev;
|
|
CvLinkedRunPoint* upper_line = 0;
|
|
CvLinkedRunPoint* lower_line = 0;
|
|
CvLinkedRunPoint* last_elem;
|
|
|
|
CvLinkedRunPoint* upper_run = 0;
|
|
CvLinkedRunPoint* lower_run = 0;
|
|
CvLinkedRunPoint* prev_point = 0;
|
|
|
|
CvSeqWriter writer_ext;
|
|
CvSeqWriter writer_int;
|
|
CvSeqWriter writer;
|
|
CvSeqReader reader;
|
|
|
|
CvSeq* external_contours;
|
|
CvSeq* internal_contours;
|
|
CvSeq* prev = 0;
|
|
|
|
if( !storage )
|
|
CV_Error( CV_StsNullPtr, "NULL storage pointer" );
|
|
|
|
if( !result )
|
|
CV_Error( CV_StsNullPtr, "NULL double CvSeq pointer" );
|
|
|
|
if( contourHeaderSize < (int)sizeof(CvContour))
|
|
CV_Error( CV_StsBadSize, "Contour header size must be >= sizeof(CvContour)" );
|
|
|
|
storage00.reset(cvCreateChildMemStorage(storage));
|
|
storage01.reset(cvCreateChildMemStorage(storage));
|
|
|
|
CvMat stub, *mat;
|
|
|
|
mat = cvGetMat( src, &stub );
|
|
if( !CV_IS_MASK_ARR(mat))
|
|
CV_Error( CV_StsBadArg, "Input array must be 8uC1 or 8sC1" );
|
|
src_data = mat->data.ptr;
|
|
img_step = mat->step;
|
|
img_size = cvGetMatSize(mat);
|
|
|
|
// Create temporary sequences
|
|
runs = cvCreateSeq(0, sizeof(CvSeq), sizeof(CvLinkedRunPoint), storage00 );
|
|
cvStartAppendToSeq( runs, &writer );
|
|
|
|
cvStartWriteSeq( 0, sizeof(CvSeq), sizeof(CvLinkedRunPoint*), storage01, &writer_ext );
|
|
cvStartWriteSeq( 0, sizeof(CvSeq), sizeof(CvLinkedRunPoint*), storage01, &writer_int );
|
|
|
|
tmp_prev = &(tmp);
|
|
tmp_prev->next = 0;
|
|
tmp_prev->link = 0;
|
|
|
|
// First line. None of runs is binded
|
|
tmp.pt.y = 0;
|
|
CV_WRITE_SEQ_ELEM( tmp, writer );
|
|
upper_line = (CvLinkedRunPoint*)CV_GET_WRITTEN_ELEM( writer );
|
|
|
|
tmp_prev = upper_line;
|
|
for( j = 0; j < img_size.width; )
|
|
{
|
|
j = findStartContourPoint(src_data, cvSize(img_size), j);
|
|
|
|
if( j == img_size.width )
|
|
break;
|
|
|
|
tmp.pt.x = j;
|
|
CV_WRITE_SEQ_ELEM( tmp, writer );
|
|
tmp_prev->next = (CvLinkedRunPoint*)CV_GET_WRITTEN_ELEM( writer );
|
|
tmp_prev = tmp_prev->next;
|
|
|
|
j = findEndContourPoint(src_data, cvSize(img_size), j + 1);
|
|
|
|
tmp.pt.x = j - 1;
|
|
CV_WRITE_SEQ_ELEM( tmp, writer );
|
|
tmp_prev->next = (CvLinkedRunPoint*)CV_GET_WRITTEN_ELEM( writer );
|
|
tmp_prev->link = tmp_prev->next;
|
|
// First point of contour
|
|
CV_WRITE_SEQ_ELEM( tmp_prev, writer_ext );
|
|
tmp_prev = tmp_prev->next;
|
|
}
|
|
cvFlushSeqWriter( &writer );
|
|
upper_line = upper_line->next;
|
|
upper_total = runs->total - 1;
|
|
last_elem = tmp_prev;
|
|
tmp_prev->next = 0;
|
|
|
|
for( int i = 1; i < img_size.height; i++ )
|
|
{
|
|
//------// Find runs in next line
|
|
src_data += img_step;
|
|
tmp.pt.y = i;
|
|
all_total = runs->total;
|
|
for( j = 0; j < img_size.width; )
|
|
{
|
|
j = findStartContourPoint(src_data, cvSize(img_size), j);
|
|
|
|
if( j == img_size.width ) break;
|
|
|
|
tmp.pt.x = j;
|
|
CV_WRITE_SEQ_ELEM( tmp, writer );
|
|
tmp_prev->next = (CvLinkedRunPoint*)CV_GET_WRITTEN_ELEM( writer );
|
|
tmp_prev = tmp_prev->next;
|
|
|
|
j = findEndContourPoint(src_data, cvSize(img_size), j + 1);
|
|
|
|
tmp.pt.x = j - 1;
|
|
CV_WRITE_SEQ_ELEM( tmp, writer );
|
|
tmp_prev = tmp_prev->next = (CvLinkedRunPoint*)CV_GET_WRITTEN_ELEM( writer );
|
|
}//j
|
|
cvFlushSeqWriter( &writer );
|
|
lower_line = last_elem->next;
|
|
lower_total = runs->total - all_total;
|
|
last_elem = tmp_prev;
|
|
tmp_prev->next = 0;
|
|
//------//
|
|
//------// Find links between runs of lower_line and upper_line
|
|
upper_run = upper_line;
|
|
lower_run = lower_line;
|
|
connect_flag = ICV_SINGLE;
|
|
|
|
for( k = 0, n = 0; k < upper_total/2 && n < lower_total/2; )
|
|
{
|
|
switch( connect_flag )
|
|
{
|
|
case ICV_SINGLE:
|
|
if( upper_run->next->pt.x < lower_run->next->pt.x )
|
|
{
|
|
if( upper_run->next->pt.x >= lower_run->pt.x -1 )
|
|
{
|
|
lower_run->link = upper_run;
|
|
connect_flag = ICV_CONNECTING_ABOVE;
|
|
prev_point = upper_run->next;
|
|
}
|
|
else
|
|
upper_run->next->link = upper_run;
|
|
k++;
|
|
upper_run = upper_run->next->next;
|
|
}
|
|
else
|
|
{
|
|
if( upper_run->pt.x <= lower_run->next->pt.x +1 )
|
|
{
|
|
lower_run->link = upper_run;
|
|
connect_flag = ICV_CONNECTING_BELOW;
|
|
prev_point = lower_run->next;
|
|
}
|
|
else
|
|
{
|
|
lower_run->link = lower_run->next;
|
|
// First point of contour
|
|
CV_WRITE_SEQ_ELEM( lower_run, writer_ext );
|
|
}
|
|
n++;
|
|
lower_run = lower_run->next->next;
|
|
}
|
|
break;
|
|
case ICV_CONNECTING_ABOVE:
|
|
if( upper_run->pt.x > lower_run->next->pt.x +1 )
|
|
{
|
|
prev_point->link = lower_run->next;
|
|
connect_flag = ICV_SINGLE;
|
|
n++;
|
|
lower_run = lower_run->next->next;
|
|
}
|
|
else
|
|
{
|
|
prev_point->link = upper_run;
|
|
if( upper_run->next->pt.x < lower_run->next->pt.x )
|
|
{
|
|
k++;
|
|
prev_point = upper_run->next;
|
|
upper_run = upper_run->next->next;
|
|
}
|
|
else
|
|
{
|
|
connect_flag = ICV_CONNECTING_BELOW;
|
|
prev_point = lower_run->next;
|
|
n++;
|
|
lower_run = lower_run->next->next;
|
|
}
|
|
}
|
|
break;
|
|
case ICV_CONNECTING_BELOW:
|
|
if( lower_run->pt.x > upper_run->next->pt.x +1 )
|
|
{
|
|
upper_run->next->link = prev_point;
|
|
connect_flag = ICV_SINGLE;
|
|
k++;
|
|
upper_run = upper_run->next->next;
|
|
}
|
|
else
|
|
{
|
|
// First point of contour
|
|
CV_WRITE_SEQ_ELEM( lower_run, writer_int );
|
|
|
|
lower_run->link = prev_point;
|
|
if( lower_run->next->pt.x < upper_run->next->pt.x )
|
|
{
|
|
n++;
|
|
prev_point = lower_run->next;
|
|
lower_run = lower_run->next->next;
|
|
}
|
|
else
|
|
{
|
|
connect_flag = ICV_CONNECTING_ABOVE;
|
|
k++;
|
|
prev_point = upper_run->next;
|
|
upper_run = upper_run->next->next;
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
}// k, n
|
|
|
|
for( ; n < lower_total/2; n++ )
|
|
{
|
|
if( connect_flag != ICV_SINGLE )
|
|
{
|
|
prev_point->link = lower_run->next;
|
|
connect_flag = ICV_SINGLE;
|
|
lower_run = lower_run->next->next;
|
|
continue;
|
|
}
|
|
lower_run->link = lower_run->next;
|
|
|
|
//First point of contour
|
|
CV_WRITE_SEQ_ELEM( lower_run, writer_ext );
|
|
|
|
lower_run = lower_run->next->next;
|
|
}
|
|
|
|
for( ; k < upper_total/2; k++ )
|
|
{
|
|
if( connect_flag != ICV_SINGLE )
|
|
{
|
|
upper_run->next->link = prev_point;
|
|
connect_flag = ICV_SINGLE;
|
|
upper_run = upper_run->next->next;
|
|
continue;
|
|
}
|
|
upper_run->next->link = upper_run;
|
|
upper_run = upper_run->next->next;
|
|
}
|
|
upper_line = lower_line;
|
|
upper_total = lower_total;
|
|
}//i
|
|
|
|
upper_run = upper_line;
|
|
|
|
//the last line of image
|
|
for( k = 0; k < upper_total/2; k++ )
|
|
{
|
|
upper_run->next->link = upper_run;
|
|
upper_run = upper_run->next->next;
|
|
}
|
|
|
|
//------//
|
|
//------//Find end read contours
|
|
external_contours = cvEndWriteSeq( &writer_ext );
|
|
internal_contours = cvEndWriteSeq( &writer_int );
|
|
|
|
for( k = 0; k < 2; k++ )
|
|
{
|
|
CvSeq* contours = k == 0 ? external_contours : internal_contours;
|
|
|
|
cvStartReadSeq( contours, &reader );
|
|
|
|
for( j = 0; j < contours->total; j++, count++ )
|
|
{
|
|
CvLinkedRunPoint* p_temp;
|
|
CvLinkedRunPoint* p00;
|
|
CvLinkedRunPoint* p01;
|
|
CvSeq* contour;
|
|
|
|
CV_READ_SEQ_ELEM( p00, reader );
|
|
p01 = p00;
|
|
|
|
if( !p00->link )
|
|
continue;
|
|
|
|
cvStartWriteSeq( CV_SEQ_ELTYPE_POINT | CV_SEQ_POLYLINE | CV_SEQ_FLAG_CLOSED,
|
|
contourHeaderSize, sizeof(CvPoint), storage, &writer );
|
|
do
|
|
{
|
|
CV_WRITE_SEQ_ELEM( p00->pt, writer );
|
|
p_temp = p00;
|
|
p00 = p00->link;
|
|
p_temp->link = 0;
|
|
}
|
|
while( p00 != p01 );
|
|
|
|
contour = cvEndWriteSeq( &writer );
|
|
cvBoundingRect( contour, 1 );
|
|
|
|
if( k != 0 )
|
|
contour->flags |= CV_SEQ_FLAG_HOLE;
|
|
|
|
if( !first )
|
|
prev = first = contour;
|
|
else
|
|
{
|
|
contour->h_prev = prev;
|
|
prev = prev->h_next = contour;
|
|
}
|
|
}
|
|
}
|
|
|
|
if( !first )
|
|
count = -1;
|
|
|
|
if( result )
|
|
*result = first;
|
|
|
|
return count;
|
|
}
|
|
|
|
static int
|
|
cvFindContours_Impl( void* img, CvMemStorage* storage,
|
|
CvSeq** firstContour, int cntHeaderSize,
|
|
int mode,
|
|
int method, CvPoint offset, int needFillBorder )
|
|
{
|
|
CvContourScanner scanner = 0;
|
|
CvSeq *contour = 0;
|
|
int count = -1;
|
|
|
|
if( !firstContour )
|
|
CV_Error( CV_StsNullPtr, "NULL double CvSeq pointer" );
|
|
|
|
*firstContour = 0;
|
|
|
|
if( method == CV_LINK_RUNS )
|
|
{
|
|
if( offset.x != 0 || offset.y != 0 )
|
|
CV_Error( CV_StsOutOfRange,
|
|
"Nonzero offset is not supported in CV_LINK_RUNS yet" );
|
|
|
|
count = icvFindContoursInInterval( img, storage, firstContour, cntHeaderSize );
|
|
}
|
|
else
|
|
{
|
|
try
|
|
{
|
|
scanner = cvStartFindContours_Impl( img, storage, cntHeaderSize, mode, method, offset,
|
|
needFillBorder);
|
|
|
|
do
|
|
{
|
|
count++;
|
|
contour = cvFindNextContour( scanner );
|
|
}
|
|
while( contour != 0 );
|
|
}
|
|
catch(...)
|
|
{
|
|
if( scanner )
|
|
cvEndFindContours(&scanner);
|
|
throw;
|
|
}
|
|
|
|
*firstContour = cvEndFindContours( &scanner );
|
|
}
|
|
|
|
return count;
|
|
}
|
|
|
|
/*F///////////////////////////////////////////////////////////////////////////////////////
|
|
// Name: cvFindContours
|
|
// Purpose:
|
|
// Finds all the contours on the bi-level image.
|
|
// Context:
|
|
// Parameters:
|
|
// img - source image.
|
|
// Non-zero pixels are considered as 1-pixels
|
|
// and zero pixels as 0-pixels.
|
|
// step - full width of source image in bytes.
|
|
// size - width and height of the image in pixels
|
|
// storage - pointer to storage where will the output contours be placed.
|
|
// header_size - header size of resulting contours
|
|
// mode - mode of contour retrieval.
|
|
// method - method of approximation that is applied to contours
|
|
// first_contour - pointer to first contour pointer
|
|
// Returns:
|
|
// CV_OK or error code
|
|
// Notes:
|
|
//F*/
|
|
CV_IMPL int
|
|
cvFindContours( void* img, CvMemStorage* storage,
|
|
CvSeq** firstContour, int cntHeaderSize,
|
|
int mode,
|
|
int method, CvPoint offset )
|
|
{
|
|
return cvFindContours_Impl(img, storage, firstContour, cntHeaderSize, mode, method, offset, 1);
|
|
}
|
|
|
|
void cv::findContours( InputOutputArray _image, OutputArrayOfArrays _contours,
|
|
OutputArray _hierarchy, int mode, int method, Point offset )
|
|
{
|
|
CV_INSTRUMENT_REGION();
|
|
|
|
// Sanity check: output must be of type vector<vector<Point>>
|
|
CV_Assert((_contours.kind() == _InputArray::STD_VECTOR_VECTOR || _contours.kind() == _InputArray::STD_VECTOR_MAT ||
|
|
_contours.kind() == _InputArray::STD_VECTOR_UMAT));
|
|
|
|
CV_Assert(_contours.empty() || (_contours.channels() == 2 && _contours.depth() == CV_32S));
|
|
|
|
Mat image0 = _image.getMat(), image;
|
|
Point offset0(0, 0);
|
|
if(method != CV_LINK_RUNS)
|
|
{
|
|
offset0 = Point(-1, -1);
|
|
copyMakeBorder(image0, image, 1, 1, 1, 1, BORDER_CONSTANT | BORDER_ISOLATED, Scalar(0));
|
|
}
|
|
else
|
|
{
|
|
image = image0;
|
|
}
|
|
MemStorage storage(cvCreateMemStorage());
|
|
CvMat _cimage = cvMat(image);
|
|
CvSeq* _ccontours = 0;
|
|
if( _hierarchy.needed() )
|
|
_hierarchy.clear();
|
|
cvFindContours_Impl(&_cimage, storage, &_ccontours, sizeof(CvContour), mode, method, cvPoint(offset0 + offset), 0);
|
|
if( !_ccontours )
|
|
{
|
|
_contours.clear();
|
|
return;
|
|
}
|
|
Seq<CvSeq*> all_contours(cvTreeToNodeSeq( _ccontours, sizeof(CvSeq), storage ));
|
|
int i, total = (int)all_contours.size();
|
|
_contours.create(total, 1, 0, -1, true);
|
|
SeqIterator<CvSeq*> it = all_contours.begin();
|
|
for( i = 0; i < total; i++, ++it )
|
|
{
|
|
CvSeq* c = *it;
|
|
((CvContour*)c)->color = (int)i;
|
|
_contours.create((int)c->total, 1, CV_32SC2, i, true);
|
|
Mat ci = _contours.getMat(i);
|
|
CV_Assert( ci.isContinuous() );
|
|
cvCvtSeqToArray(c, ci.ptr());
|
|
}
|
|
|
|
if( _hierarchy.needed() )
|
|
{
|
|
_hierarchy.create(1, total, CV_32SC4, -1, true);
|
|
Vec4i* hierarchy = _hierarchy.getMat().ptr<Vec4i>();
|
|
|
|
it = all_contours.begin();
|
|
for( i = 0; i < total; i++, ++it )
|
|
{
|
|
CvSeq* c = *it;
|
|
int h_next = c->h_next ? ((CvContour*)c->h_next)->color : -1;
|
|
int h_prev = c->h_prev ? ((CvContour*)c->h_prev)->color : -1;
|
|
int v_next = c->v_next ? ((CvContour*)c->v_next)->color : -1;
|
|
int v_prev = c->v_prev ? ((CvContour*)c->v_prev)->color : -1;
|
|
hierarchy[i] = Vec4i(h_next, h_prev, v_next, v_prev);
|
|
}
|
|
}
|
|
}
|
|
|
|
void cv::findContours( InputOutputArray _image, OutputArrayOfArrays _contours,
|
|
int mode, int method, Point offset)
|
|
{
|
|
CV_INSTRUMENT_REGION();
|
|
|
|
findContours(_image, _contours, noArray(), mode, method, offset);
|
|
}
|
|
|
|
/* End of file. */
|