/**
 * <p>A little demo to showcase the ERODE and DILATE filters in action. 
 * <ul>
 * <li><strong>click</strong> - apply currently active filter</li>
 * <li><strong>SPACE</strong> - toggle between ERODE (grow dark areas) and DILATE (grow light areas)</li>
 * <li><strong>L / l</strong> - re-load image</li>
 * </ul>
 * These filters can come in handy for computer vision tasks (e.g. noise removal or as part of an image/feature segmentation process).
 * In general there are other possible kernel shapes for this type of filter, though the diamond shaped one (as used here) performs faster.
 * </p>
 */

PImage cam;

boolean isEroding=true;

void setup() {
  size(320,240,P3D);
  cam=loadImage("infrared2.jpg");
}

void draw() {
  image(cam,0,0);
}

void mousePressed() {
  cam.filter(isEroding ? ERODE : DILATE);
}

void keyPressed() {
  if ((key&0x5f)=='L') cam=loadImage("infrared2.jpg");
  if (key==' ') isEroding=!isEroding; 
}