DetectSkin Utility

DetectSkin.as

package {
	import flash.display.*;
	import flash.geom.Rectangle;
	import flash.utils.ByteArray;
	public class DetectSkin extends Sprite {   
		public function detectSkinCount(bmd1:BitmapData):int{ 
			var ht:int=0;
			var ba2:ByteArray = new ByteArray(); 
			var count:int =0;
			var ba1:ByteArray;
			var wt:int;
			var clr:uint;
			var rclr:Number;
			var gclr:Number;
			var bclr:Number;
			var rlum:Number;
			var glum:Number;
			var skinClr:Boolean; 
			ba1 = bmd1.getPixels(new Rectangle(0, 0, bmd1.width, bmd1.height));
			ba1.position = 0;
			while (ht < bmd1.height) {
				wt = 0;
				while (wt < bmd1.width) {
					clr = ba1.readUnsignedInt();
					rclr = (clr >> 16) & 0xFF;
					gclr = (clr >> 8) & 0xFF;
					bclr = clr & 0xFF;
					rlum = rclr;
					if(rlum < gclr)rlum = gclr;
					if(rlum < bclr)rlum = bclr;
					glum = rclr;
					if(glum > gclr)glum = gclr;
					if(glum > bclr)glum = bclr;
					skinClr = (((((((((((rclr > 80)) && ((gclr > 40)))) && ((bclr > 20)))) && (((rlum - glum) > 15)))) && (((rclr - gclr) > 15)))) && ((rclr > bclr))); 
					if(skinClr)count++; 
					ba2.writeUnsignedInt(((skinClr) ? clr : 0xFF000000)); 
					wt++;
				};
				ht++;
			}; 
			ba2.position = 0;
			bmd1.setPixels(new Rectangle(0, 0, bmd1.width, bmd1.height), ba2);
			return count;
		} 
	}
}