動体検知

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favorite:6
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license : All rights reserved
modified : 2008-12-19 02:34:57

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// write as3 code here..
package {

import flash.display.*;
    import flash.events.*;
    import flash.geom.*;
    import flash.media.Camera;
    import flash.media.Video;

[SWF(frameRate="10", backgroundColor="#000000")]
    public class MotionCamera extends Sprite
    {
        
        private var camera:Camera;
        private var video:Video;
        private var button:Sprite;
        private var bmd:BitmapData;

private var now:BitmapData;
        private var before:BitmapData;
        private var rect:Rectangle;
        private var pt:Point;
        
        public function MotionCamera()
        {
            addEventListener(Event.ADDED_TO_STAGE, init);
        }

private function init(e:Event = null):void
        {
            
            stage.scaleMode = StageScaleMode.NO_SCALE;
            stage.align = StageAlign.TOP_LEFT;

camera = Camera.getCamera();

if (camera != null)
            {
                setupCamera();
            }
                   
            bmd = new BitmapData(camera.width*2, camera.height*2 ,false,0xffffff);
            var bmp:DisplayObject =  addChild(new Bitmap(bmd));
            bmp.scaleX = 1.5;
            bmp.scaleY = 1.5;

addEventListener(Event.ENTER_FRAME, loop);

now = new BitmapData(camera.width*2, camera.height*2);
            before = new BitmapData(camera.width*2, camera.height*2);
            rect = new Rectangle(0, 0, camera.width*2, camera.height*2);
            pt = new Point(0, 0);
            
        }

private function setupCamera():void
        {
            video = new Video(camera.width*2, camera.height*2);
            video.attachCamera(camera);
            //addChild(video);
        }

private function loop(e:Event):void
        {
            now.draw(video);
            now.draw(before, new Matrix(), new ColorTransform(), BlendMode.DIFFERENCE);
            var ret:uint = now.threshold(now, rect, pt, ">", 0xff111111, 0xffffffff);
            before.draw(video);
            bmd.draw(now);
        }
    }
}

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