Color Remap

This transformation lets you make very precise changes to the colors in an image. To change colors, you create a list of color pairs - one color to search for and one to replace it with. The transformation works by looking at each pixel in the input image, and changing its color by an amount that depends on how close it is to any of the search colors. The closer it is to a search color, the closer it is made to the corresponding replace color.

Unlike the Selective Correction transformation which ignores the brightness of a color when searching for a match, Color Remap matches on the brightness as well as the hue and saturation.

Amount

The amount control lets you control how much of the color remap transformation is applied to the input image. You can apply a percentage of the transformation to the entire image, or you can specify an amount mask to restrict the effects of the transformation to only part of the input image.

Tightness

The tightness slider lets you control overall how tight a match to a search color is required to replace it. The higher the tightness, the less similar colors are affected and the more limited the change to the output image.

Color Pairs

Up to eight different rows of color pairs may be created. To create a new color pair, shift-click on the input image at a location with the color you want to change. Color pairs are displayed as two color squares. The outer square is the search color while the inner square is the replace color, so in the example above we are replacing a certain green with blue. The chroma radius and brightness sliders give you individual control over how close the hue and saturation (chroma) or the brightness must match for the search color to be replaced. The larger the slider, the more colors similar to the search color will be affected.

Right-clicking on a color pair pops up an option menu that lets you make the replace color the same as the search color, delete the color pair, add a new color pair, or manually edit the search or replace colors.

Settings Menu

Probe Size (1x1/3x3/5x5/7x7/9x9)

These options let you control the sample size used by the probe. Larger probe sizes are useful for obtaining an average reading of any area of the image that does not have a smooth texture; smaller probe sizes let you get precise readings of very small areas. The currently selected probe size is shown with a check mark.