März 5, 2012

import processing.video.Capture;
Capture video;

int threshold = 20; 
int aveX, aveY; 
float objectR =255;
float objectG = 0;
float objectB = 0;
boolean debug = true;
int lastTime; 
void setup() {
  size(640, 480);
  println(Capture.list());
  video = new Capture(this,width,height);

}
void draw(){
  if (video.available()){
 
    lastTime = millis();  
    video.read();
    int totalFoundPixels= 0;  
    int sumX = 0;  
    int sumY = 0;

  for (int row = 0; row < video.height; row++) {
      for (int col = 0; col < video.width; col++) {

        int offset = row * width + col;
   
        int thisColor = video.pixels[offset];

        float r = red(thisColor);
        float g = green(thisColor);
        float b = blue(thisColor);

        float diff = dist(r, g, b, objectR, objectG, objectB);

        if (diff < threshold) { 
          sumX = sumX + col;
          sumY= sumY + row;
          totalFoundPixels++;
          if (debug) video.pixels[offset] = 0xff000000;
        }
      }
    }
    if (debug) image(video,0,0);
    if (totalFoundPixels > 0){
      aveX = sumX/totalFoundPixels;
      aveY = sumY/totalFoundPixels;
      ellipse(aveX-10,(aveY-10),20,20);
    }
  }
}
void mousePressed(){

  int offset = mouseY * width + mouseX;
  int thisColor = video.pixels[offset];


   objectR = red(thisColor);
   objectG = green(thisColor);
   objectB = blue(thisColor);

}