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Item
Black point
Sets the minimum input level.
slider
Gray point
Sets the gray point (gamma value) for
slider
chroma.
White point
Sets the maximum input level.
slider
Input/output
Chroma input and output levels for the point
levels
under the cursor in the edit display.
The distribution of pixels of different chromas
in the output image are displayed when this
button is clicked. Click again to view the
chroma distribution for the input image.
Restores the chroma curve to linear. Con-
trol-click (Windows) or command-click
(Macintosh) to restore the curves for lumi-
nosity, chroma, and hue to linear.
Reference: The Tool Chest
Description
The Hue Editor
When Hue is selected from the menu at the top of the LCH
Editor palette, the editor takes on the appearance shown on
the following page. The controls for editing hue are unique,
consisting of a rainbow-colored background bisected by a straight
line, representing the hues (colors) in the original image. Super-
imposed on this line is another representing the colors in the
image after editing. Before editing, the output line is the same as
the input line, so that, for example, reds in the input will be
represented as red in the final image. By changing the shape of
this line, you can change the relationship between input and
output colors over a portion of the color range, with the result
that colors that are red in the original might be output as or-
ange, or even green or blue.
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