Lab Enhancements

Using Photoshop’s Lab color mode, you can perform a number of simple image enhancements. For some of these enhancements there are similar RGB operations; however, the results are subtly (and sometimes not-so-subtly) different. The international standard L*a*b* color space¬†from which the Lab mode in Photoshop was derived was constructed to capture the range of human vision. It was based on statistical evaluations of the range of color vision (the “a” and “b” channels) ¬†and of just-perceptible differences in brightness (the Lightness channel).

Several techniques are illustrated by Photoshop actions that you can download. Explanations and a few tips on how to perform the actions manually follow.

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ColorMunki Quirks

The ColorMunki color profiling device from XRite is one of the core technologies of my color workflow, but it has its oddities. Fortunately, there are some workarounds–and where there are none, patience is a virtue. Profiling a second monitor presented some difficulties, and the device has some ergonomic design shortcomings. You also have to learn to deal with a few good features.

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