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Merge pull request #19780 from HarryDC:feature/index-multiimage-tiff

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Add reading of specific images from multipage tiff

* Add reading of specific images from multipage tiff

* Fix build issues

* Add missing flag for gdal

* Fix unused param warning

* Remove duplicated code

* change public parameter type to int

* Fix warnings

* Fix parameter check
This commit is contained in:
Harald Scheirich
2021-04-23 16:48:32 -04:00
committed by GitHub
parent a53582d706
commit fcaeeac931
3 changed files with 207 additions and 17 deletions
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modules/imgcodecs/include/opencv2/imgcodecs.hpp
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@@ -215,6 +215,26 @@ The function imreadmulti loads a multi-page image from the specified file into a
*/
CV_EXPORTS_W bool imreadmulti(const String& filename, CV_OUT std::vector<Mat>& mats, int flags = IMREAD_ANYCOLOR);
/** @brief Loads a of images of a multi-page image from a file.
The function imreadmulti loads a specified range from a multi-page image from the specified file into a vector of Mat objects.
@param filename Name of file to be loaded.
@param start Start index of the image to load
@param count Count number of images to load
@param flags Flag that can take values of cv::ImreadModes, default with cv::IMREAD_ANYCOLOR.
@param mats A vector of Mat objects holding each page, if more than one.
@sa cv::imread
*/
CV_EXPORTS_W bool imreadmulti(const String& filename, CV_OUT std::vector<Mat>& mats, int start, int count, int flags = IMREAD_ANYCOLOR);
/** @brief Returns the number of images inside the give file
The function imcount will return the number of pages in a multi-page image, or 1 for single-page images
@param filename Name of file to be loaded.
@param flags Flag that can take values of cv::ImreadModes, default with cv::IMREAD_ANYCOLOR.
*/
CV_EXPORTS_W size_t imcount(const String& filename, int flags = IMREAD_ANYCOLOR);
/** @brief Saves an image to a specified file.
The function imwrite saves the image to the specified file. The image format is chosen based on the