Page Comparison

import processing.video.*;
Capture video;

color trackColor;


void setup() {
  size(640, 480);

  // start video capture
  video = new Capture(this, width, height, 15);
  video.start();

  // initialize track color to red
  trackColor = color(255, 0, 0);
  smooth();
}

void draw() {
  // read video frame if available
  if (video.available()) {
    video.read();
  }

  // load pixels
  video.loadPixels();

 image(video, 0, 0 // draw video
  image(video, 0, 0);

  // initialize record to number greater than the diagonal of the screen
  float worldRecordrecord = 500; 
width+height;

  // initialize variable to store closest point
  intPVector closestXclosestPoint = new 0PVector();
  int closestY = 0
  // get track color as vector
  PVector trackColorVec = new PVector(red(trackColor), green(trackColor), blue(trackColor));

  // go PVectorthrough closestPointimage =pixel new PVector();
  by pixel
  for (int x=0; x < video.width; x++) {
    for (int y=0; y < video.height; y++) {
      // get pixel location
      int loc = x + y * video.width;
      
      // get pixel color
      color currentColor = video.pixels[loc];;

      // get current color as vector
      PVector currColorVec = new PVector(red(currentColor), green(currentColor), blue(currentColor)); 
     PVector trackColorVec = new PVector(red(trackColor), green(trackColor), blue(trackColor)); 
      // calculate distance between current color and track color
      float diffdist = currColorVec.dist(trackColorVec);

      // save point if closer than previous
      if (diffdist < worldRecordrecord) {
        worldRecordrecord = diffdist;
        closestPoint.x = x;
        closestPoint.y = y;
      }
    }
  }

  // draw point if (worldRecordwe found a one that is less than 10 apart
  if (record < 10) { 
    fill(trackColor);
    strokeWeight(4.0);
    stroke(0);
    ellipse(closestPoint.x, closestPoint.y, 50, 50);
  }
}

void mousePressed() {
  // save color of current pixel under the mouse
  int loc = mouseX + mouseY * video.width;
  trackColor = video.pixels[loc];
}