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77 lines
2.0 KiB
Plaintext
77 lines
2.0 KiB
Plaintext
import gab.opencv.*;
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import org.opencv.imgproc.Imgproc;
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import org.opencv.core.MatOfPoint2f;
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import org.opencv.core.Point;
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import org.opencv.core.Size;
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import org.opencv.core.Mat;
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import org.opencv.core.CvType;
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OpenCV opencv;
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PImage src;
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PImage card;
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int cardWidth = 250;
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int cardHeight = 350;
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Contour contour;
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void setup() {
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src = loadImage("cards.png");
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size(src.width + cardWidth, src.height);
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opencv = new OpenCV(this, src);
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opencv.blur(1);
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opencv.threshold(120);
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contour = opencv.findContours(false, true).get(0).getPolygonApproximation();
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card = createImage(cardWidth, cardHeight, ARGB);
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opencv.toPImage(warpPerspective(contour.getPoints(), cardWidth, cardHeight), card);
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}
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Mat getPerspectiveTransformation(ArrayList<PVector> inputPoints, int w, int h) {
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Point[] canonicalPoints = new Point[4];
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canonicalPoints[0] = new Point(w, 0);
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canonicalPoints[1] = new Point(0, 0);
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canonicalPoints[2] = new Point(0, h);
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canonicalPoints[3] = new Point(w, h);
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MatOfPoint2f canonicalMarker = new MatOfPoint2f();
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canonicalMarker.fromArray(canonicalPoints);
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Point[] points = new Point[4];
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for (int i = 0; i < 4; i++) {
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points[i] = new Point(inputPoints.get(i).x, inputPoints.get(i).y);
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}
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MatOfPoint2f marker = new MatOfPoint2f(points);
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return Imgproc.getPerspectiveTransform(marker, canonicalMarker);
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}
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Mat warpPerspective(ArrayList<PVector> inputPoints, int w, int h) {
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Mat transform = getPerspectiveTransformation(inputPoints, w, h);
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Mat unWarpedMarker = new Mat(w, h, CvType.CV_8UC1);
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Imgproc.warpPerspective(opencv.getColor(), unWarpedMarker, transform, new Size(w, h));
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return unWarpedMarker;
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}
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void draw() {
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image(src, 0, 0);
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noFill();
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stroke(0, 255, 0);
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strokeWeight(4);
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contour.draw();
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fill(255, 0);
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ArrayList<PVector> points = contour.getPoints();
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for (int i = 0; i < points.size(); i++) {
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text(i, points.get(i).x, points.get(i).y);
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}
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pushMatrix();
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translate(src.width, 0);
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image(card, 0, 0);
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popMatrix();
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}
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