title: AS3 - How to remove all black and grey from bitmap, but retain color?
body: <p>I'd like to be able to alter an image (specifically a bitmap) in order to replace all dark grey and black pixels with white in ActionScript 3, but maintain all other colors in the image. I am familiar with ColorMatrixFilter and bitmapdata.threshold, but I don't know how to use them to either target the colors I want to remove or check within a specific range of colors. Is there any (efficient) way to go about doing this?</p>
  
  <p>Thanks for any help you can offer.</p>