背景差分 元画像 background sbtraction original

by ton 01 Dec 2010

• Forked from ton's 背景差分 2値化 background sbtraction binary
• Diff: 17
• Related works: 3
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package {
	import com.bit101.components.HUISlider;
	import com.bit101.components.Label;
	import com.bit101.components.PushButton;
	import flash.display.*;
	import flash.events.Event;
	import flash.geom.Point;
	import flash.media.Camera;
	import flash.media.Video;
	import flash.system.Security;
	import net.hires.debug.Stats;

    /**
     * flashで背景差分のテスト
     * 差分のオリジナル画像を出すバージョン
     * 
     * [set background]ボタンを押したときのキャプチャ画像と現在のキャプチャ画像で差分をとります
     * スライダーで閾値を調節できます
     * @author ton-up.net
     */
    public class BackgroundSubtraction extends Sprite {
        private const BG_COLOR:uint = 0xFFFFFFFF;
        private const DIFF_COLOR:uint = 0xFF000000;
        private const DEFAULT_THRESHOLD:uint = 0x30;

        private var video:Video;
        private var bgBmd:BitmapData;
        private var nowBmd:BitmapData;
        private var p:Point = new Point();
        private var slider:HUISlider;
        private var button:PushButton;
        private var threshold:uint;
        
        public function BackgroundSubtraction():void {
			Security.allowDomain("*");
            var camera:Camera = Camera.getCamera();
            if (!camera) {
                new Label(this, 10, 10, "can't use camera");
                return ;
            }
            
            camera.setMode(stage.stageWidth, stage.stageHeight, 30);
            video = new Video(camera.width, camera.height);
            video.attachCamera(camera);
            
            bgBmd = new BitmapData(video.width, video.height, false);
            nowBmd = new BitmapData(video.width, video.height, false);
			
            addChild(new Bitmap(nowBmd));
            
            addChild(new Stats());

            slider = new HUISlider(this, 100, 10, "threshold", setThreshold);
            slider.setSliderParams(0, 0xFF, DEFAULT_THRESHOLD);
            slider.tick = 1;
            
            button = new PushButton(this, 350, 10, "set background", function():void {bgBmd.draw(video);});
            
            setThreshold();
            
            addEventListener(Event.ENTER_FRAME, update);
        }
        
        private function setThreshold(e:Event = null):void {
            var v:uint = slider.value;
            threshold = 0xFF000000 | v << 16 | v << 8 | v;
        }

        private function update(e:Event):void {
            nowBmd.draw(bgBmd);
            nowBmd.draw(video, null, null, BlendMode.DIFFERENCE);
            nowBmd.threshold(nowBmd, nowBmd.rect, p, "<=", threshold, BG_COLOR);
            nowBmd.threshold(nowBmd, nowBmd.rect, p, "!=", BG_COLOR, DIFF_COLOR);
			nowBmd.draw(video, null, null, BlendMode.ADD);
        }
    }
}