import org.opencv.calib3d.*;
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.imgproc.*;
import java.util.List;
import java.util.LinkedList;
import java.util.ArrayList;
final public class HomographyTest {
public static void main(String[] args) {
System.loadLibrary(Core.NATIVE_LIBRARY_NAME); // needed by OpenCV
String rfileoutput = "/home/will/dev/Homog.jpg";
String ofileoutput = "/home/will/dev/HomogOutput.jpg";
Point SEShedCornerDst = new Point(49, 74);
Point CloseForsythiaDst = new Point(41, 41);
Point CornerHazelDst = new Point(111, 157);
Point FarForsythiaDst = new Point(175, 21);
Point FirstLiquidAmberDst = new Point(235, 164);
Point SecondLiquidAmberDst = new Point(282, 721);
Point ThirdLiquidAmberDst = new Point(317, 544);
Point SEShedCornerSrc = new Point(30, 231);
Point CloseForsythiaSrc = new Point(160, 290);
Point CornerHazelSrc = new Point(50, 125);
Point FarForsythiaSrc = new Point(628, 146);
Point FirstLiquidAmberSrc = new Point(299, 64);
Point SecondLiquidAmberSrc = new Point(146, 37);
Point ThirdLiquidAmberSrc = new Point(48,34);
Point [] srcArray = new Point[7];
srcArray[0] = SEShedCornerSrc;
srcArray[1] = CloseForsythiaSrc;
srcArray[2] = CornerHazelSrc;
srcArray[3] = FarForsythiaSrc;
srcArray[4] = FirstLiquidAmberSrc;
srcArray[5] = SecondLiquidAmberSrc;
srcArray[6] = ThirdLiquidAmberSrc;
Mat OutputMat = new Mat();
LinkedList<Point> dstArray = new LinkedList<Point>();
dstArray.add(SEShedCornerDst);
dstArray.add(CloseForsythiaDst);
dstArray.add(CornerHazelDst);
dstArray.add(FarForsythiaDst);
dstArray.add(FirstLiquidAmberDst);
dstArray.add(SecondLiquidAmberDst);
dstArray.add(ThirdLiquidAmberDst);
MatOfPoint2f dst = new MatOfPoint2f();
dst.fromList(dstArray);
MatOfPoint2f src = new MatOfPoint2f();
src.fromArray(srcArray);
Mat Homog;
Homog = Calib3d.findHomography(src, dst, Calib3d.RANSAC, 10, OutputMat);
Mat homography = Calib3d.findHomography(src, dst, Calib3d.RANSAC, 10);
// image you want to transform
Mat image = Highgui.imread("image/img.jpg");
// outputMat will contain the perspectively changed image
Imgproc.warpPerspective(image, outputMat, homography, new Size(image.cols(), image.rows()));
Mat src = new Mat();
// push a mat object with your points to the src
src.push_back(new MatOfPoint2f(new Point(x,y)));
// dst will contain your transformed points
Core.perspectiveTransform(src, dst, homography)
}
} |