Ambient Light (processing)

/*
Processing color picker
Shows a canvas filled with the average color seen by the video source (usually a webcam).
Version 1.0
--------------------------------------------
Copyright 2013 DraftFCB Chicago
Licensed under the Eclipse Public License, Version 1.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
  http://www.eclipse.org/legal/epl-v10.html
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
//code mpdified from this code
//https://github.com/dfcb/processing-color-averager/blob/master/processing_color_averager.pde
   import processing.serial.*;

import processing.video.*;
// Variable for capture device
Capture video;
Serial myPort;
String test1 ="";
int Colorsend = 0;
int canvasWidth = 640;
int canvasHeight = 480;
int  bt = 1;
void setup() {  String portName = Serial.list()[32]; //change the 0 to a 1 or 2 etc. to match your port
  myPort = new Serial(this, portName, 9600);
  size(canvasWidth,canvasHeight);
  video = new Capture(this, width, height, 30);
  video.start();
  // Remove border from shapes drawn
  strokeWeight(0);
}

void draw() {

  // Capture video
  if (video.available()) {
    video.read();
  }

  loadPixels();
  video.loadPixels();

  //red, green and blue accumulators
  int rAcc = 0;
  int gAcc = 0;
  int bAcc = 0;

  //red, green and blue value averages
  int rAvg = 0;
  int gAvg = 0;
  int bAvg = 0;

  //total number of pixels for calculating average color
  int numPix =(video.width * video.height);

  // Loop through the pixels
  for (int x = 0; x < video.width; x ++ ) {
    for (int y = 0; y < video.height; y ++ ) {

      int loc = x + y*video.width;
      color current = video.pixels[loc];

      // Add the current red, green and blue values to the accumulators
      rAcc += red(current);
      gAcc += green(current);
      bAcc += blue(current);

    }
  }
  // Average red, green and blue values by dividing the accumulator by the number of pixels
  rAvg = rAcc / numPix;
  gAvg = gAcc / numPix;
  bAvg = bAcc / numPix;
  rAvg  = constrain(rAvg,5, 255);
  bAvg  = constrain(bAvg,5, 255);
  gAvg  = constrain(gAvg,5, 255);
  test1= +rAvg+","+gAvg+","+gAvg+'\r'; //create a comma seperated string in R,G,B format with a carriage return
  // Set fill color to average value
  fill(color(rAvg, gAvg, bAvg));
  // Fill canvas with a rectangle
  rect(0, 0, canvasWidth, canvasHeight);
  set(0, 0, video);
    rect(0, 0, 150, 150);
  myPort.write(test1);          //send CSV string to the arduino

 // println(test1);
}