TAILIEUCHUNG - Photoshop Lab Color- P12

Photoshop Lab Color- P12: LAB has a reputation for enormous power, yet virtually all reference materials that advocate its use illustrate its capabilities with a single class of image. This chapter introduces the basic LAB correction method and explains why it is so extraordinarily effective. if you happen to have a picture of a canyon. | Figure Left the original Figure repeated for convenience. Right thefinal sharpened version. The image of the younger woman measures as having a slight red cast on the reasonable assumption that both the hair and the background should be neutral. In glamour photography like this a warmer feel is often desired so I suspect the photographer did this on purpose. Nevertheless the recipe calls for taking it out. The man s hair has a slight bias toward magenta but the image s midrange seems fine. Therefore I lightened the darkest areas of the green channel with a curve. There appears to be no color problem with the older woman. So we proceed to Step One of the recipe applying the green channel of each to the composite image on a new layer set to Luminosity mode. The results are shown in Figure . As expected all images have increased contrast and are somewhat darker which we ll take care of later in LAB. You should be able to see the adjustment in the man s hair color that occurred between Figures and . And the color change in the younger woman is obvious and disagreeable muting the red cast has made the skin too gray. Fortunately working in LAB means never having to worry about tepid colors. Next comes the intermediate step of looking for strong reds. I see none in any of the three. On to Step Two converting to LAB and flattening the images and to Step Three the creation of a duplicate layer for overlay blends to the A and B. The paths diverge here because we have three sharply different complexions. As noted earlier the lighter the complexion the more it should favor use of the B the darker the A. The three results of the overlay step are in Figure . They re all intentionally too colorful and all made with different overlay percentages. 332 Chapter 16 Light-skinned Caucasians such as the older woman in this set and the earlier subject of Figure generally need the yellow component of their flesh emphasized more than the magenta. These

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