Tint

The Tint transformation applies color to a black and white image based on its brightness level. You assign different colors to different brightness level using a Color Line Control.

If the input is a color image, it is first converted to black and white internally based on its luminance channel and then this luminance image is tinted.

Amount

The amount control lets you reduce the effect of the transformation for the whole image or restrict the application of the transformation to part of the image by specifying a mask.

Palette Rotation

The palette rotation amount control lets you rotate the colors in the color line by shifting the color line left or right with the color shifted off one end filling the empty space at the other end. The amount of palette rotation can be varied by specifying an amount mask.

Color Line

The color line control lets you define a range of colors to which the black and white image is mapped.

Probes

The color line control responds to clicks on the input image -- clicking and dragging on the input image displays a red line over the color gradient at the gray level corresponding to the brightness of the image at the cursor location.

Shift-clicking on the input image inserts a new control point into the color line at the location corresponding to the brightness of the image where you shift-clicked. This feature makes it easier to control what colors are assigned to specific parts of the image. Bear in mind that if you create a color picker to edit a control point color, you will need to click back on the Tint transformation dialog box to re-enable the color line probe, since the color picker uses the probe to select colors from the input image.

Example of palette rotation with a linear gradient mask

Original Image

No palette rotation                                                           With varying palette rotation