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| Line 36: |
Line 36: |
| | -sets up webcam and shows security panel | | -sets up webcam and shows security panel |
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| − | import flash.media.Camera;
| + | [[Image:Cam_code.jpg]] |
| − | import flash.system.Security;
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| − | import flash.system.SecurityPanel;
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| − | import flash.events.*;
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| − | | |
| − | var cam:Camera = Camera.getCamera();
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| − | if(cam != null){
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| − | cam.setMode(video1.width, video1.height, 12, true);
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| − | video1.attachCamera(cam);
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| − | cam.addEventListener(ActivityEvent.ACTIVITY, activityHandler);
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| − | }else{
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| − | Security.showSettings(SecurityPanel.CAMERA)
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| − | }
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| − | var inited:Boolean=false;
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| − | function activityHandler(event:ActivityEvent):void {
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| − | if(cam.muted){
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| − | Security.showSettings(SecurityPanel.CAMERA)
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| − | }else if(!inited){
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| − | initialize();
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| − | inited=true;
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| − | }
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| − |
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| − | //trace("activityHandler: " + event);
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| − | }
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| | | | |
| | BITMAP: | | BITMAP: |
| − | import flash.display.Bitmap;
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| − | import flash.display.BitmapData;
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| − | import flash.geom.Matrix;
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| − | import flash.utils.Timer;
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| − | import flash.events.TimerEvent;
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| − |
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| − |
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| − | var now:BitmapData;
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| − | var out:BitmapData;
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| − | var before:BitmapData;
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| − | var bitmap:Bitmap;
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| − | var timer:Timer;
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| − | var m:Matrix;
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| − | var max:int = 7;
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| − | function initialize(){
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| − | //create an array that will be the fading image cue
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| − | list=new Array()
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| − | //create an identity matrix
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| − | m=new Matrix()
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| − | //scale the transformation matrix to match the scale of the Video object on stage
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| − | m.scale((video1.scaleX),(video1.scaleY))
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| − | //create a bitmap object in memory that is the same size as the Video object on stage
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| − | now=new BitmapData(video1.width, video1.height, true, 0x00000000);
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| − | //create a bitmap object in memory to hold a layered bitmap from the fading image cue
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| − | out=new BitmapData(video1.width, video1.height, true, 0x00000000);
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| − | //out.draw(video1,m);
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| − | before = out.clone();
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| − | bitmap=new Bitmap();
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| − | //create a bitmap to display the bitmapdata
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| − | this.addChild(bitmap);
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| − | //position it to the right of the live Webcam feed
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| − | //bitmap.x=video1.x+video1.width;
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| − | bitmap.x=video1.x;
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| − | bitmap.y=video1.y;
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| − | //call the snap function every 1/10th of a second
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| − | timer = new Timer(100);
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| − | timer.addEventListener(TimerEvent.TIMER, snap);
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| − | timer.start();
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| − | }
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| − | //capture a freezeframe from the webcam and copy it, called regularly do detect movement
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| − | function snap(event:TimerEvent){
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| − |
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| − | bitmap.bitmapData=out;
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| − | //draw the video into the bitmapdata object object with the scaled transformation matrix
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| − | now.draw(video1,m)
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| − | //copy the current freezeframe
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| − | done=now.clone()
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| − | //now draw the previous freezeframe ("BEFORE"!) on top of the current frameframe and apply the 'difference' blendmode
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| − | done.draw(before,m,null,"difference")
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| − |
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| − | //filter out all pixels in the differenced bitmap that are greater than just over black (0xFF111111) and make them green (0xFF00FF00)
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| − | //over-write the previous contents of the bitmap
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| − | done.threshold(done,done.rect,done.rect.topLeft,">",0xFF707070,0xFF00FF00,0xFFFFFFFF,true) //important line, used to set threshold of colors and change background to black while movement/people to green
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| − |
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| − |
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| − |
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| − | //add the finished bitmap to a fading image cue
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| − | list.push(done.clone())
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| − | //if the cue is now greater than the maximum length we specified
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| − | if(list.length > max)
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| − | {
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| − | //then remove the bitmap at the very front of the cue
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| − | //and free the memory it was using
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| − | list.shift().dispose()
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| − | }
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| − | //how many items in the fading cue
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| − | var l=list.length
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| − | //how much should the green channel deteriate on each degradation
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| − | var each=255/l
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| − | //declare local var to speed up the loop
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| − | var g
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| − | //var changed:uint
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| − | //clear the out bitmap object so we can start a fresh
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| − | out.fillRect(out.rect,0xFF000000)
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| − | //copy the current bitmap and save it for the next time this function is called
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| − | before=now.clone()
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| − | //loop through each bitmap in the fading image cue
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| − | for(var i=0;i<l;++i)
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| − | {
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| − | //determine the current degradation
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| − | g=each*i
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| − |
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| − | out.threshold(list[i], out.rect, out.rect.topLeft, "<=", 0xFF707070, 0x00000000, 0xFF000000, true);
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| − | //this line was added to make unimportant pixels transparent - used for background changing
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| − |
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| − | //copy all the pixels that are green in the current item in the fading image cue and make them into the degradated green color
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| − | //add those pixels on top of the bitmap that will displayed to the user
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| − | out.threshold(list[i],out.rect,out.rect.topLeft,"==",0xFF00FF00,(255<<24 | 0<<16 | g<<8 | 0),0x00FFFFFF,false)
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| − |
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| − | }
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