Calibrate works?

lib/opencv_processing/examples/ImageDiff/ImageDiff.pde

@@ -0,0 +1,38 @@
+import gab.opencv.*;
+
+OpenCV opencv;
+PImage  before, after, grayDiff;
+//PImage colorDiff;
+void setup() {
+  before = loadImage("before.jpg");
+  after = loadImage("after.jpg");
+  size(before.width, before.height);
+
+  opencv = new OpenCV(this, before);    
+  opencv.diff(after);
+  grayDiff = opencv.getSnapshot(); 
+
+//  opencv.useColor();
+//  opencv.loadImage(after);
+//  opencv.diff(after);
+//  colorDiff = opencv.getSnapshot();
+ 
+}
+
+void draw() {
+  pushMatrix();
+  scale(0.5);
+  image(before, 0, 0);
+  image(after, before.width, 0);
+//  image(colorDiff, 0, before.height);
+  image(grayDiff, before.width, before.height);
+  popMatrix();
+
+  fill(255);
+  text("before", 10, 20);
+  text("after", before.width/2 +10, 20);
+  text("gray diff", before.width/2 + 10, before.height/2+ 20);
+
+//  text("color diff", 10, before.height/2+ 20);
+}
+