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    <p>Creating fine-grained noise dynamically is computationally expensive, so I generate low-res noise and scale it up. In your project, simply add the bitmap setup code after the addEventListener call and then add the single line to generate the noise to your activity loop.</p> <pre><code>package { import flash.display.Bitmap; import flash.display.BitmapData; import flash.display.BlendMode; import flash.display.Sprite; import flash.events.Event; import flash.geom.Matrix; import flash.media.Camera; import flash.media.Video; import flash.utils.getTimer; public class NoiseMain extends Sprite { protected static const VID_WIDTH : uint = 640; protected static const VID_HEIGHT : uint = 480; protected static const NOISE_SCALE_X : Number = 4; protected static const NOISE_SCALE_Y : Number = 2; protected var _vid : Video; protected var _noise : BitmapData; protected var _composite : BitmapData; protected var _matrix : Matrix; public function NoiseMain() { // We're creating a webcam outlet, but not adding it to the stage since we want to post-process the image. _vid = new Video(VID_WIDTH, VID_HEIGHT); var cam : Camera = Camera.getCamera(); cam.setMode(VID_WIDTH, VID_HEIGHT, 30); _vid.attachCamera(cam); var w : uint = Math.ceil(VID_WIDTH / NOISE_SCALE_X); var h : uint = Math.ceil(VID_HEIGHT / NOISE_SCALE_Y); _noise = new BitmapData(w, h, false, 0xFFFFFF); _composite = new BitmapData(VID_WIDTH, VID_HEIGHT, false, 0x000000); var bmp : Bitmap = new Bitmap(_composite); addChild(bmp); _matrix = new Matrix(NOISE_SCALE_X, 0, 0, NOISE_SCALE_Y); stage.addEventListener(Event.ENTER_FRAME, enterFrameHandler); } protected function enterFrameHandler(evt : Event) : void { _noise.noise(getTimer(), 204, 255, 7, true); _composite.lock(); _composite.draw(_vid); _composite.draw(_noise, _matrix, null, BlendMode.MULTIPLY); _composite.unlock(); } } } </code></pre> <p>EDIT: I've revised my example to be more in line with what you're trying to do. You can tweak the noise scale constants to change the "texture" of the noise as well as messing with the strength of the noise (the 2nd and 3rd arguments to the noise() method) and the visual appearance of the noise by changing the BlendMode in the 2nd draw() call).</p>
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    1. POadding noise to a video in actionscript
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    1. USJoshua Sullivan
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    1. COJoshua, thank you SO much. I'm going to try out your code. I'll get back on you if I'm having trouble. Thanks again! :)
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      1. USshaumadhana
    2. COJoshua.. the noise worked pretty well. Thank you. But I'm worried I've been explaining wrong : You see, what I want is, the noise would appear when the camera launches - not after the program runs (calculations, transformations, rendering the 3d object, etc). If the noise appears after the camera launches, hopefully I can find out the noise limitation that my program can tolerate (by adding or reducing the noise). Because my main purpose is I wanted to calculate the PSNR of my program. I'm so sorry Joshua for the misunderstanding. Can you help me? :( I really appreciate your help. Danke.
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    3. COI've updated my code example to be more relevant to what you're doing.
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