var w = 640;

var h = 480;

​

function setup() {

    capture = createCapture(VIDEO);

    createCanvas(w, h);

    capture.size(w, h);

    capture.hide();

}

​

function draw() {

    image(capture, 0, 0, w, h);

    capture.loadPixels();

    if (capture.pixels.length > 0) { 

      var x = mouseX;

      var y = mouseY;

      var index = (x + y * capture.width)*4;

      var R = capture.pixels[index+0];

      var G = capture.pixels[index+1];

      var B = capture.pixels[index+2];

      var A = capture.pixels[index+3];

    }

    select('#pixel-value').elt.innerText = R + ',' + G + ',' + B;

    select('#pixel-color').elt.style.backgroundColor = 'rgb(' + R + ',' + G + ',' + B + ')';

}