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ImgZoner.java
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ImgZoner.java
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package org.genericsystem.cv;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.stream.Collectors;
import org.opencv.core.Mat;
import org.opencv.core.MatOfPoint;
import org.opencv.core.Scalar;
import org.opencv.imgproc.Imgproc;
public class ImgZoner {
private List<Zone> zones = new ArrayList<>();
public static List<Zone> getZones(Mat imgSrc) {
return new ImgZoner(imgSrc).getZones();
}
public static List<Zone> getAdjustedZones(Mat imgSrc, double dx, double dy) {
return getZones(imgSrc).stream().map(zone -> zone.adjustRect(dx, dy, imgSrc.width(), imgSrc.height())).collect(Collectors.toList());
}
private ImgZoner(Mat imgSrc) {
Mat gray = new Mat();
Imgproc.cvtColor(imgSrc, gray, Imgproc.COLOR_BGR2GRAY);
List<MatOfPoint> contours = new ArrayList<>();
Imgproc.findContours(gray, contours, new Mat(), Imgproc.RETR_EXTERNAL, Imgproc.CHAIN_APPROX_SIMPLE);
double minArea = 500;
Collections.sort(contours, (c1, c2) -> Double.compare(Imgproc.contourArea(c2), Imgproc.contourArea(c1)));
for (int i = 0; i < contours.size(); i++) {
MatOfPoint contour = contours.get(i);
double contourarea = Imgproc.contourArea(contour);
if (contourarea > minArea)
zones.add(new Zone(Imgproc.boundingRect(contour)));
}
}
public List<Zone> getZones() {
return zones;
}
public static void drawAdjustedZones(Mat imageToZone, double dx, double dy, Scalar scalar, int thickness) {
getAdjustedZones(imageToZone, dx, dy).forEach(adjusted -> adjusted.draw(imageToZone, scalar, thickness));
}
}