imageconvolution: Auto Color

[The Little Guy]

I wrote a script in ActionScript that takes an image and does color correction, giving me the same results as photoshop's "Auto Color" feature.

 

The actionscript uses an image matrix that looks like this:

var cmf:ColorMatrixFilter = new ColorMatrixFilter(new Array(
R, 0, 0, 0, 0,
0, G, 0, 0, 0,
0, 0, B, 0, 0,
0, 0, 0, 1, 0
));

 

This is different from the php GD's matrix imageconvolution, which is only 3x3 where the actionscript one is 5x4. I think this is why I am getting different image results.

 

Any suggestions to get the two to act the same? I am stumped...