3 ms·

Color spaces and ICC profiles: Guide to XYZ, RGB, ICC, xyY, and TRCs

5 points by unwind 13y ago

vanattab 13y ago
It should be noted that the axis of of the XYZ color space does not perfectly corresponded to the cone sensitivity of the human eye. The X and Y are close but there is significant error in the Z (blueish). If you need to isolate colors to a single cone in the human eye you need to use the LMS color space. I which stands for the long, medium, and short wavelength cones.
vanattab 13y ago
It should be noted that the axis of of the XYZ color space does not perfectly corresponded to the cone sensitivity of the human eye. The X and Y are close but there is significant error in the Z (blueish). If you need to isolate colors to a single cone in the human eye you need to use the LMS color space. I which stands for the long, medium, and short wavelength cones.
ToastyMallows 13y ago
I wish I found this site when I took Color Science in college. I was able to pick a free elective and that one sounded fun. The first day I went the professor rattled off 3 prerequisite classes "we all should have taken by now", I hadn't taken any of them. In fact, I was the only CS major in the class. I explained the situation to the professor and he understood but he said it would be a hard class. Fortunately, we worked in groups for every assignment, so I could get some help from people that actually knew what they were doing. The book we had for the class was dense and I never really found a perfect overview of everything we were learning. This website really sums up a lot of it. We went into more detail about the 1931 XYZ color space, and learned about color spaces that were made after that and how they affected the field. I ended up learning a lot in that class. One of the big assignments we had was to take a photo of a portrait under different light conditions in a light booth (daylight, sunset, incandescent, etc.) and use MATLAB programs to make all of the photos look exactly the same. Here's a Wikipedia article that covers a lot of what we did: https://en.wikipedia.org/wiki/Color_balance https://en.wikipedia.org/wiki/Color_balance

5 points by unwind 13y ago

It should be noted that the axis of of the XYZ color space does not perfectly corresponded to the cone sensitivity of the human eye. The X and Y are close but there is significant error in the Z (blueish). If you need to isolate colors to a single cone in the human eye you need to use the LMS color space. I which stands for the long, medium, and short wavelength cones.

vanattab 13y ago

ToastyMallows 13y ago

I wish I found this site when I took Color Science in college. I was able to pick a free elective and that one sounded fun. The first day I went the professor rattled off 3 prerequisite classes "we all should have taken by now", I hadn't taken any of them. In fact, I was the only CS major in the class. I explained the situation to the professor and he understood but he said it would be a hard class. Fortunately, we worked in groups for every assignment, so I could get some help from people that actually knew what they were doing. The book we had for the class was dense and I never really found a perfect overview of everything we were learning. This website really sums up a lot of it. We went into more detail about the 1931 XYZ color space, and learned about color spaces that were made after that and how they affected the field. I ended up learning a lot in that class. One of the big assignments we had was to take a photo of a portrait under different light conditions in a light booth (daylight, sunset, incandescent, etc.) and use MATLAB programs to make all of the photos look exactly the same. Here's a Wikipedia article that covers a lot of what we did: https://en.wikipedia.org/wiki/Color_balance https://en.wikipedia.org/wiki/Color_balance