The following sketch should capture a video signal from a DV cam, check if a pixel fulfills a condition (brightness), then give a response. The patch works fine as I see the response in time on my screen. But the same responde should also be sent to arduino. Now it's getting strange. Arduino gives respones when I start the patch,after ~1 sec nothing.
I'm not a efficient programmer so maybe my code is crap/too slow. Or is the arduino-processing communication crapy.
Thanks for any hint.

import JMyron.*;

import processing.serial.*;

import cc.arduino.*;

Arduino arduino;

JMyron m;

//fixe pixelpositionen für notengrabbing
int x_gr = 172;
int x_ro = 286;
int x_ge = 403;
int x_bl = 516;
int x_or = 629;
int y = 377;
int x = 0;

int num = 0;

int w = 720;
int h = 576;

boolean hit = false;

int i=0;
int j=0;

int pin = 11;

color gruen = color(0, 255,0);
color rot = color(255, 0,0);
color gelb = color(255, 255,0);
color blau = color(0, 0,255);
color orange = color(255, 170,0);

color fc = color(0,0,0);

color blank = color(255,255,255);

void setup(){

 int w = 720;
 int h = 576;
 //int w = 320;
 //int h = 240;

 colorMode(HSB, 255);

 size(w,h);

 m = new JMyron();
 m.start(720,576);
 m.findGlobs(1);
 println("Myron " + m.version());

 //arduino setup
 
 arduino = new Arduino(this, Arduino.list()[1], 115200);
 arduino.pinMode(11, Arduino.OUTPUT);
 arduino.pinMode(12, Arduino.OUTPUT);
 arduino.pinMode(13, Arduino.OUTPUT);

}

void mousePressed(){

 println(mouseX);
 println(mouseY);

}

void draw(){

 m.trackColor(255,255,255,255);

 m.update();
 int[] img = m.image();

 //first draw the camera view onto the screen
 loadPixels();

 for(int i=0;i<width*height;i++){
   pixels[i] = img[i];
 }

 updatePixels();

 for(int j=0; j<=2; j++) {
   switch(j) {
   case 0:
     x = x_gr;
     fc = gruen;
     break;
   case 1:
     x = x_ro;
     fc = rot;
     break;
     case 2:
     x = x_ge;
     fc = gelb;
     break;
   
   }

   color cp = pixels[y*w+x];
   float value = brightness(cp);

   //check if brightness value is above
   if (value >= 200) {

     hit =true;
     pin = pin + 1;

     arduino.digitalWrite(pin, Arduino.HIGH);
     arduino.digitalWrite(pin, Arduino.LOW);
   }

   noStroke();
   fill(blank);

   if (hit) {
     fill(fc);
     hit = false;
   }
   rect(x, 0, 55, 55);
 
 
   rect(x_gr, y, 5, 5);
   rect(x_ro, y, 5, 5);
   rect(x_ge, y, 5, 5);
   rect(x_bl, y, 5, 5);
   rect(x_or, y, 5, 5);
 }
}

public void stop(){
 m.stop();
 super.stop();
}