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Flex: How to adjust the contrast / brightness of an image inside an image control?

I have an image loaded into a control Image

and I would like to know the most efficient way I can darken / lighten the image programmatically.

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Check out the Adobe BitmapFilter class. You can do some pretty cool stuff with it. Take a special look at its derived classes and examples of their use.



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Although I went with Robusto method, I also found this, which works well

var a:Number = value * 11;
var b:Number = 63.5 - (value * 698.5);
redValue = greenValue = blueValue = a;
redOffset = greenOffset = blueOffset = b;
var cmf:ColorMatrixFilter = new ColorMatrixFilter(a, 0, 0, 0, b, 0, a, 0, 0, b, 0, 0, a, 0, b, 0, 0, 0, 1, 0);


This is where "Manipulating Images in Flex" was taken , and a lot more fun with modifying images.

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