The official 0.4 release!

Also, added an unwrapped Hough lines example in prep for wrapping it.

examples/HoughLineDetection/HoughLineDetection.pde

@@ -0,0 +1,63 @@
+import gab.opencv.*;
+import org.opencv.imgproc.Imgproc;
+import org.opencv.core.Mat;
+import java.awt.geom.Line2D;
+
+OpenCV opencv;
+
+ArrayList<Line2D> lines;
+
+void setup() {
+ PImage src = loadImage("film_scan.jpg");
+ src.resize(0, 800);
+ size(src.width, src.height, P2D);
+
+ opencv = new OpenCV(this, src);
+ opencv.findSobelEdges(1, 0);
+ opencv.threshold(20);
+
+ lines = findLines(opencv.getGray(), 200, 120, 5);
+
+ for(Line2D l : lines){
+ println(Math.toDegrees(angleOf(l)));
+ }
+
+ noLoop();
+}
+
+double angleOf(Line2D l){
+ Line2D vertical = new Line2D.Double(0,0, 0,1);
+
+ return angleBetween(l, vertical);
+}
+
+double angleBetween(Line2D line1, Line2D line2) {
+ double angle1 = Math.atan2(line1.getY1() - line1.getY2(), 
+ line1.getX1() - line1.getX2());
+ double angle2 = Math.atan2(line2.getY1() - line2.getY2(), 
+ line2.getX1() - line2.getX2());
+ return angle1-angle2;
+}
+
+ArrayList<Line2D> findLines(Mat m, int threshold, double minLength, double maxGap) {
+ ArrayList<Line2D> result = new ArrayList<Line2D>();
+
+ Mat lineMat = new Mat();
+ Imgproc.HoughLinesP(m, lineMat, 1, PI/180.0, threshold, minLength, maxGap);
+ for (int i = 0; i < lineMat.width(); i++) {
+ double[] coords = lineMat.get(0, i);
+ result.add(new Line2D.Double(coords[0], coords[1], coords[2], coords[3]));
+ }
+
+ return result;
+}
+
+void draw() {
+ image(opencv.getOutput(), 0, 0);
+ stroke(0, 255, 0);
+ strokeWeight(2);
+ for (Line2D line : lines) {
+ line((float)line.getX1(), (float)line.getY1(), (float)line.getX2(), (float)line.getY2());
+ }
+}
+

resources/build.properties

@@ -154,7 +154,7 @@ library.version=5
 
 # The version as the user will see it. 
 
-library.prettyVersion=0.4-beta1
+library.prettyVersion=0.4
 
 
 library.copyright=(c) 2013