определение темный пиксел под мышкой или светлый

[TWETTI]

Вот код:

package
{
	import flash.display.Bitmap;
	import flash.display.Loader;
	import flash.display.Sprite;
	import flash.events.Event;
	import flash.events.MouseEvent;
	import flash.net.URLRequest;
 
	public class Main extends Sprite
	{
		private var loader:Loader;
 
		public function Main()
		{
			loader = new Loader();
			loader.contentLoaderInfo.addEventListener(Event.COMPLETE, onComplete);
			loader.load(new URLRequest("img.jpg"));
 
			stage.addEventListener(MouseEvent.MOUSE_MOVE, onMove);
		}
 
		private function onMove(e:MouseEvent):void 
		{
			var color:uint = (loader.content as Bitmap).bitmapData.getPixel(mouseX, mouseY);
			var r:uint = (color >> 16) & 0xFF;
			var g:uint = (color >> 8) & 0xFF;
			var b:uint = color & 0xFF;
			var light:Number = (0.2126*r) + (0.7152*g) + (0.0722*b);
			// от 0 черный до 255 белый
			if (light >= 127.5) trace("светлый");
			else trace("темный");
		}
 
		private function onComplete(e:Event):void 
		{
			addChild(loader.content);
		}
	}
}