July 15th

Currently code

import fl.video.*;

import flash.display.BitmapData; 

 

var myVideo:Video;  

//var myCamera:Camera = Camera.get();  

  

//myVideo.attachVideo("640x480.flv");  

 

var snapshot : BitmapData; 

 

snapshot = new BitmapData(myVideo.width,myVideo.height);  

  

//function takeSnapshot()  

//{  

//   snapshot.draw(myVideo);  

//}  

  

// call takeSnapshot every 100ms (0.1s)  

//setInterval(this,"takeSnapshot",100);  

  

var now : BitmapData; 

var before: BitmapData;  

 

now = new BitmapData(myVideo.width,myVideo.height);  

 

function takeSnapshot2()  

{  

   now.draw(myVideo);  

// 1. capture 'now' 2. Do something 3. copy now to before   

   before=now.clone();  

}  

oldC = computeAverageColour(before,10,10,20,20);  

newC = computeAverageColour(now,10,10,20,20);  

if (oldC != newC) {  

   trace('Activity... in region');  

} 

  

function computeAverageColour(bm:BitmapData, x:int, y:int, w:int, h:int):Number{  

   var totalR:Number = 0; // 32-bit colour is formatted  

   var totalG:Number = 0; // 8 bits 8 bits 8 bits 8 bits  

   var totalB:Number = 0; //    A      R      G       B  

   var count:Number = 0;  

 

   for (var j:Number = y; j < (y + h); j++) {  

     for (var i:Number = x;  i < (x + w); i++) {  

        var col:Number = bm.getPixel(i, j);  

        var red:Number = (col & 0xFF0000) >> 16;  

        var green:Number = (col & 0x00FF00) >> 8;  

        var blue:Number = col & 0x0000FF;  

        totalR += red;  

        totalG += green;  

        totalB += blue;  

        count++;  

     }  

  }  

// Calculate the average of each colour channel  

  var tR:Number = Math.round(totalR/count);  

  var tG:Number = Math.round(totalG/count);  

  var tB:Number = Math.round(totalB/count);  

// Join them together  

  var targetCol:Number = tR <<>

  return  targetCol;  

}   

Experience issues with oldC and newC. Today I'll strive to resolve them.