Hi,

I cannot finish the script as I try to add motion difference to another script.
Could you say where is a problem?
I am new to processing and I think I made mistakes when I tried to combine different scripts.

Here is the script:

import processing.video.*;

int numPixels;
int[] previousFrame;

Capture video;

int mcount = 0;
int thresh = 40;

boolean cheatScreen;





String letterOrder =
  "jjhkjhkglkhn" +
  "mkjloaeda";
char[] letters;

float[] bright;
char[] chars;

PFont font;
float fontSize = 1.5;


public void setup() {
  size(640, 480, P2D);
  video = new Capture(this, 80, 60, 15);
 
  numPixels = video.width * video.height;
  int count = video.width * video.height;
   previousFrame = new int[numPixels];
    loadPixels();
  font = loadFont("KaiTi-48.vlw");
  letters = new char[256];
  for (int i = 0; i < 256; i++) {
    int index = int(map(i, 0, 256, 0, letterOrder.length()));
    letters[i] = letterOrder.charAt(index);
  }
  chars = new char[count];
  bright = new float[count];
  for (int i = 0; i < count; i++) {
    bright[i] = 128;
  }
}


public void captureEvent(Capture c) {
  c.read();
}


void draw() {
 
  background(0);
  pushMatrix();
  float hgap = width / float(video.width);
  float vgap = height / float(video.height);
  scale(max(hgap, vgap) * fontSize);
  textFont(font, fontSize);

  int index = 0;

    translate(0,  1.0 / fontSize);
    pushMatrix();
    for (int x = 0; x < video.width; x++) {
      int pixelColor = video.pixels[index];
      // Faster method of calculating r, g, b than red(), green(), blue()
  if (video.available()) {
    video.read(); 
    video.loadPixels();
    int movementSum = 0;
    int curPixel = 0;

      for(int y = 0; y < video.width; y++){
      int i = curPixel;
       curPixel++;
      color currColor = video.pixels[i];
      color prevColor = previousFrame[i];
      int currR = (currColor >> 16) & 0xFF;
      int currG = (currColor >> 8) & 0xFF;
      int currB = currColor & 0xFF;
      int prevR = (prevColor >> 16) & 0xFF;
      int prevG = (prevColor >> 8) & 0xFF;
      int prevB = prevColor & 0xFF;
      int diffR = abs(currR - prevR);
      int diffG = abs(currG - prevG);
      int diffB = abs(currB - prevB); 
      movementSum += diffR + diffG + diffB;
      if((diffR > thresh) || (diffR < (0 - thresh)) || (diffG > thresh) || (diffG < (0 - thresh)) || (diffB > thresh) || (diffB < (0 - thresh))){
        pixels[i] = color(255, 255, 0);
      } else {
         pixels[i] = color(currR, currG, currB);
      }
      previousFrame[i] = currColor;
    }
    }  
    if (movementSum > 0) {
      updatePixels();
    
      int pixelBright = max(currR, currG, currB);
     
     
     
     
     
     
     

    
      float diff = pixelBright - bright[index];
      bright[index] += diff * 0.1;

      fill(pixelColor);
      int num = int(bright[index]);
      text(letters[num], 0, 0);
     
    
      index++;


      translate(1.0 / fontSize, 0);
    }
    popMatrix();
  }
  popMatrix();

  if (cheatScreen) {
 
    set(0, height - video.height, video);
  }
}