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Tutorial Mask Operations on Matrices

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tribta
2017-08-21 15:08:13 +01:00
parent 954e2f9b9c
commit 45afd29b72
3 changed files with 64 additions and 88 deletions
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samples/java/tutorial_code/core/mat_mask_operations/MatMaskOperations.java
+13 -38
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@@ -2,14 +2,10 @@ import org.opencv.core.Core;
import org.opencv.core.CvType;
import org.opencv.core.Mat;
import org.opencv.core.Scalar;
import org.opencv.highgui.HighGui;
import org.opencv.imgcodecs.Imgcodecs;
import org.opencv.imgproc.Imgproc;
import javax.swing.*;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.awt.image.DataBufferByte;
class MatMaskOperationsRun {
public void run(String[] args) {
@@ -31,8 +27,10 @@ class MatMaskOperationsRun {
System.exit(-1);
}
Image img = toBufferedImage(src);
displayImage("Input", img, 0, 200);
HighGui.namedWindow("Input", HighGui.WINDOW_AUTOSIZE);
HighGui.namedWindow("Output", HighGui.WINDOW_AUTOSIZE);
HighGui.imshow( "Input", src );
double t = System.currentTimeMillis();
Mat dst0 = sharpen(src, new Mat());
@@ -40,8 +38,9 @@ class MatMaskOperationsRun {
t = ((double) System.currentTimeMillis() - t) / 1000;
System.out.println("Hand written function time passed in seconds: " + t);
Image img2 = toBufferedImage(dst0);
displayImage("Output", img2, 400, 400);
HighGui.imshow( "Output", dst0 );
HighGui.moveWindow("Output", 400, 400);
HighGui.waitKey();
//![kern]
Mat kern = new Mat(3, 3, CvType.CV_8S);
@@ -58,8 +57,10 @@ class MatMaskOperationsRun {
t = ((double) System.currentTimeMillis() - t) / 1000;
System.out.println("Built-in filter2D time passed in seconds: " + t);
Image img3 = toBufferedImage(dst1);
displayImage("Output", img3, 800, 400);
HighGui.imshow( "Output", dst1 );
HighGui.waitKey();
System.exit(0);
}
//! [basic_method]
@@ -108,38 +109,12 @@ class MatMaskOperationsRun {
return Result;
}
//! [basic_method]
public Image toBufferedImage(Mat m) {
int type = BufferedImage.TYPE_BYTE_GRAY;
if (m.channels() > 1) {
type = BufferedImage.TYPE_3BYTE_BGR;
}
int bufferSize = m.channels() * m.cols() * m.rows();
byte[] b = new byte[bufferSize];
m.get(0, 0, b); // get all the pixels
BufferedImage image = new BufferedImage(m.cols(), m.rows(), type);
final byte[] targetPixels = ((DataBufferByte) image.getRaster().getDataBuffer()).getData();
System.arraycopy(b, 0, targetPixels, 0, b.length);
return image;
}
public void displayImage(String title, Image img, int x, int y) {
ImageIcon icon = new ImageIcon(img);
JFrame frame = new JFrame(title);
JLabel lbl = new JLabel(icon);
frame.add(lbl);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.pack();
frame.setLocation(x, y);
frame.setVisible(true);
}
}
public class MatMaskOperations {
public static void main(String[] args) {
// Load the native library.
System.loadLibrary(Core.NATIVE_LIBRARY_NAME);
new MatMaskOperationsRun().run(args); // run code
new MatMaskOperationsRun().run(args);
}
}