The Photo Lab tool lets you simulate camera exposure and photo development changes in images. You can change the exposure to brighten or darken an image in incremental steps, providing perceptually relative uniform changes in luminance. Photo development adjustments can produce images with different color distribution.
With the Photo Lab tool, you can set the exposure, gamma, pivot, and lift of each color channel independently and in a variety of units, such as F-stops or printer lights for exposure. See Modifying Negative Film Gamma Cineon Reference or Linear Reference Levels with Photo Lab.
The input image is first subjected to a gain adjustment, then to a gamma correction around a pivot point, and finally to a lift. Each step is optional.
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