In the beginning, digital photography sensors were monochromatic. If you wanted color, you made three successive exposures through different filters, which were usually mounted on a wheel for rapid sequencing. A variant of this approach was to use a series of prisms and half-silvered mirrors to split the imaging light into three beams which were… [Read More]
Search Results for: color space conversion
Patents and papers about color
Papers: Kasson, J.M., “Efficient, Chromaticity-Preserving Sharpening for RGB Images,” Device-Independent Color Imaging, Walowit, E., Editor, SPIE vol. 2414, pp. 134-145 (1995). Kasson, J.M., “Efficient, Chromaticity-Preserving Midtone Correction for RGB Images,” Second Color Imaging Conference, Scottsdale, AZ, November 15-18, 1994. Kasson, J. M., “Tetrahedral Interpolation Algorithm Accuracy,” Device-Independent Color Imaging, Walowit, E., Editor, SPIE vol. 2170… [Read More]
Qimage color management
I blew it in the previous post when I said Qimage doesn’t do color management. I’m not sure what I was thinking; I had forgotten that I had used the color management features in the previous generation of Qimage, and I couldn’t find them in the v2011.136 version that I am currently using. The reason… [Read More]
How do adaptation errors add?
This is the nineteenth in a series of posts on color reproduction. The series starts here. You don’t have to read the whole thing if you don’t want to. I’ll try to make this post reasonably self-contained. If you get confused, reading the series from the beginning may be useful. In the previous post in… [Read More]
ICM vs ACE
In Photoshop, as installed under Windows, You can choose between Adobe’s ACE color engine, and Microsoft’s ICM when performing color space conversions. I have been using ACE up to now. I wondered if ICM could produce more accurate results. In a word, no. I took the 256 million color sRGB noise image that I’d created… [Read More]
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