init - 初始化项目

2022-05-06 01:58:53 +08:00
commit 90a5cc7cb6
6772 changed files with 2837787 additions and 0 deletions
--- a/samples/java/tutorial_code/ImgTrans/warp_affine/GeometricTransformsDemo.java
+++ b/samples/java/tutorial_code/ImgTrans/warp_affine/GeometricTransformsDemo.java
@@ -0,0 +1,80 @@
+import org.opencv.core.Core;
+import org.opencv.core.Mat;
+import org.opencv.core.MatOfPoint2f;
+import org.opencv.core.Point;
+import org.opencv.highgui.HighGui;
+import org.opencv.imgcodecs.Imgcodecs;
+import org.opencv.imgproc.Imgproc;
+
+class GeometricTransforms {
+    public void run(String[] args) {
+        //! [Load the image]
+        String filename = args.length > 0 ? args[0] : "../data/lena.jpg";
+        Mat src = Imgcodecs.imread(filename);
+        if (src.empty()) {
+            System.err.println("Cannot read image: " + filename);
+            System.exit(0);
+        }
+        //! [Load the image]
+
+        //! [Set your 3 points to calculate the  Affine Transform]
+        Point[] srcTri = new Point[3];
+        srcTri[0] = new Point( 0, 0 );
+        srcTri[1] = new Point( src.cols() - 1, 0 );
+        srcTri[2] = new Point( 0, src.rows() - 1 );
+
+        Point[] dstTri = new Point[3];
+        dstTri[0] = new Point( 0, src.rows()*0.33 );
+        dstTri[1] = new Point( src.cols()*0.85, src.rows()*0.25 );
+        dstTri[2] = new Point( src.cols()*0.15, src.rows()*0.7 );
+        //! [Set your 3 points to calculate the  Affine Transform]
+
+        //! [Get the Affine Transform]
+        Mat warpMat = Imgproc.getAffineTransform( new MatOfPoint2f(srcTri), new MatOfPoint2f(dstTri) );
+        //! [Get the Affine Transform]
+
+        //! [Apply the Affine Transform just found to the src image]
+        Mat warpDst = Mat.zeros( src.rows(), src.cols(), src.type() );
+
+        Imgproc.warpAffine( src, warpDst, warpMat, warpDst.size() );
+        //! [Apply the Affine Transform just found to the src image]
+
+        /** Rotating the image after Warp */
+
+        //! [Compute a rotation matrix with respect to the center of the image]
+        Point center = new Point(warpDst.cols() / 2, warpDst.rows() / 2);
+        double angle = -50.0;
+        double scale = 0.6;
+        //! [Compute a rotation matrix with respect to the center of the image]
+
+        //! [Get the rotation matrix with the specifications above]
+        Mat rotMat = Imgproc.getRotationMatrix2D( center, angle, scale );
+        //! [Get the rotation matrix with the specifications above]
+
+        //! [Rotate the warped image]
+        Mat warpRotateDst = new Mat();
+        Imgproc.warpAffine( warpDst, warpRotateDst, rotMat, warpDst.size() );
+        //! [Rotate the warped image]
+
+        //! [Show what you got]
+        HighGui.imshow( "Source image", src );
+        HighGui.imshow( "Warp", warpDst );
+        HighGui.imshow( "Warp + Rotate", warpRotateDst );
+        //! [Show what you got]
+
+        //! [Wait until user exits the program]
+        HighGui.waitKey(0);
+        //! [Wait until user exits the program]
+
+        System.exit(0);
+    }
+}
+
+public class GeometricTransformsDemo {
+    public static void main(String[] args) {
+        // Load the native OpenCV library
+        System.loadLibrary(Core.NATIVE_LIBRARY_NAME);
+
+        new GeometricTransforms().run(args);
+    }
+}