Detect only skin color

SkinChrome.mxml

<?xml version="1.0" encoding="utf-8"?>
<s:WindowedApplication xmlns:fx="http://ns.adobe.com/mxml/2009" 
					   xmlns:s="library://ns.adobe.com/flex/spark" 
					   xmlns:mx="library://ns.adobe.com/flex/mx" applicationComplete="appComplete(event)" width="400" height="300">
	<fx:Script>
		<![CDATA[
			import mx.events.FlexEvent;
			
			private var video:Video; 
			private var camera:Camera;
			private var viewbd:BitmapData;
			private var skinner:DetectSkin = new DetectSkin();
			
			protected function appComplete(event:FlexEvent):void
			{
				init(400,300);
				addEventListener(Event.ENTER_FRAME, enterFrame);
				stg.addChild(skinner);
			}
			
			private function setupCamera(wt:int,ht:int):void{ 
				video = new Video(wt,ht);
				video.attachCamera(camera);
			}
			
			private function init(wt:int,ht:int):void{
				var bmp:Bitmap;
				camera = Camera.getCamera();
				if (camera != null){
					setupCamera(wt,ht);
				} else {
					return;
				};
				viewbd = new BitmapData(wt,ht);
				bmp = new Bitmap(viewbd);
				bmp.width = wt;
				bmp.height = ht;
				skinner.addChild(bmp); 
			} 
			
			private function enterFrame(ev:Event):void{ 
				viewbd.lock();
				viewbd.draw(video); 
				skinner.detectSkinCount(viewbd); 
				viewbd.unlock(); 
			}  
		]]>
	</fx:Script>
	<s:SpriteVisualElement id="stg"/>
</s:WindowedApplication>