On Fri, Sep 28, 2012 at 10:20:08AM +0300, Janne Liljeblad wrote:
> Port of Gimp Rgb Noise. Adds noise to image.

Two comments:

 1. If you really want to compute three Gaussian noise values per pixel,
    you should probably use the Ziggurat method for generating the random
    values; the ratio method is very slow. (That, and you should not
    do a divide per nextDouble()!)
 2. There's absolutely no point in counting downwards in a loop that doesn't
    use its index; it doesn't buy any speed, and has not since sometime
    during the nineties. The compiler is able to do such transformations if
    it is a win.

I'd probably suggest dropping the micro-optimization ala #2, and then instead
use a profiler to find the parts that are actually slow (and fix them).

/* Steinar */
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