Question re filter matrices

[UkooLabs]

Was wondering the following If you have a filter matrix that say does sepia and another that does some other filter, can you multiply the matrices to get a combined effect and if so would be a cool processor if you could combine filter matrices and apply.

[JimBobSquarePants]

Yeah you can already multiply ColorMatrix structs and pass them to Filter.

Here's an example from our unit tests.

ColorMatrix brightness = KnownFilterMatrices.CreateBrightnessFilter(0.9F);
ColorMatrix hue = KnownFilterMatrices.CreateHueFilter(180F);
ColorMatrix saturation = KnownFilterMatrices.CreateSaturateFilter(1.5F);
return brightness * hue * saturation;