setupVideoCallback

Takes a video element, a callback and a number.
Returns nothing.

The number is the time, in milliseconds, between frames.

The callback takes no arguments and returns nothing.

 var canvas = document.getElementById('canvas');
 var ctx = canvas.getContext('2d');

 var vid = document.getElementById('vid');

 function capture()
 {
    canvas.width = vid.clientWidth;
    canvas.height = vid.clientHeight;
     
    ctx.drawImage(vid, 0, 0);
 
    var data = ctx.getImageData(0, 0, vid.clientWidth, vid.clientHeight);

    var edges = jsia.detectEdgePixels(data, 32);
    ctx.putImageData(edges, 0, 0);
 }

 jsia.setupVideoCallback(vid, capture, 10);
 //Sets up the capture function to be called every ten milliseconds
 //to read the information of the current video from in the vid object.
 //(The capture function takes the image data, detects the edge pixels
 //and then displays them on the canvas.)