5
Apr/080
Apr/080
Adding noise with the bitmap class
This is a small test I did with the bitmap class; the code reads every pixel in an image and adds this pixel to the original position +/- 2 pixels, resulting in a “noisy” image.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 | package { import flash.display.*; import flash.events.*; import flash.net.*; public class Bitmaptest extends Sprite { private var loader:Loader; private var color:uint; public function Bitmaptest():void { init(); } public function init():void { loader = new Loader(); loader.contentLoaderInfo.addEventListener( Event.INIT, initListener ); loader.load( new URLRequest( "audi_tt_v2.png" ) ); } public function initListener( e:Event ):void { addChild( loader.content ); Bitmap( loader.content ).bitmapData.lock(); for( var i:int = 0; i < Bitmap( loader.content ).bitmapData.height; i++ ) { for( var j:int = 0; j < Bitmap( loader.content ).bitmapData.width; j++ ) { color = Bitmap( loader.content ).bitmapData.getPixel32( j, i ); Bitmap( loader.content ).bitmapData.setPixel32( j + Math.round( Math.random()*4-2 ), i + Math.round( Math.random()*4-2 ), color ); } } Bitmap( loader.content ).bitmapData.unlock(); } } } |
pre/post effect:
