Manipulate bitmap color in VBA to simulate colorblindness

My boss is color blind, and I was thinking that if I could manipulate bitmap images, then I could see what he is able to tell apart and what looks just the same.

I have found the transform matices for lots of different afflictions at http://web.archive.org/web/200810141...s/colormatrix/


{Normal:{ R:[100, 0, 0], G:[0, 100, 0], B:[0, 100, 0]},
Protanopia:{ R:[56.667, 43.333, 0], G:[55.833, 44.167, 0], B:[0, 24.167, 75.833]},
Protanomaly:{ R:[81.667, 18.333, 0], G:[33.333, 66.667, 0], B:[0, 12.5, 87.5]},
Deuteranopia:{ R:[62.5, 37.5, 0], G:[70, 30, 0], B:[0, 30, 70]},
Deuteranomaly:{ R:[80, 20, 0], G:[25.833, 74.167, 0], B:[0, 14.167, 85.833]},
Tritanopia:{ R:[95, 5, 0], G:[0, 43.333, 56.667], B:[0, 47.5, 52.5]},
Tritanomaly:{ R:[96.667, 3.333, 0], G:[0, 73.333, 26.667], B:[0, 18.333, 81.667]},
Achromatopsia:{ R:[29.9, 58.7, 11.4], G:[29.9, 58.7, 11.4], B:[29.9, 58.7, 11.4]},
Achromatomaly:{ R:[61.8, 32, 6.2], G:[16.3, 77.5, 6.2], B:[16.3, 32.0, 51.6]}

How do I manipulate a bitmap's color in vba?

Thanks, Andy,

That is an interesting resource. It will provide a useful check. It is limited in the size of an image, so it will not serve the main purpose, but will provide a check of what I do. Can you or anyone else point me to a resource that will tell me how to manipulate a bitmap pixel color in VBA? or tell me that it can't be done? I will happily accept either form of the answer, or this one if I don't get another answer.

/g