Nikon 9235 Reference Manual - Page 79

The LCH Editor, For more information on, dynamic range.

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Page 79 highlights

The LCH Editor The LCH Editor models color using three components, Luminosity (brightness), Chroma (color saturation, or vividness), and Hue, each with its own edit display. The luminosity and chroma displays take the same form as the curve edit display in the Curves palette. By steepening the curve in the luminosity display, you increase the difference between the bright and dark portions of the image, increasing contrast. Steepening the curve in the chroma window increases color saturation, making colors more vivid. Both editors feature a histogram display, auto contrast, and white point, black point, and gray point sliders, allowing you to match the maximum, minimum, and mid-range output levels for luminosity and chroma to the values actually present in the input, making the maximum use of the scanner's dynamic range. They also incorporate output level sliders, making it possible to edit the maximum and minimum values for output. The hue editor features unique controls that grant unparalleled flexibility when editing colors. Using this tool, you can map a specific range of colors in the input to a different range of colors in the output, allowing you to make the reds in the image more orange, for example, or even green or blue. Changes made in the LCH Editor only apply when the checkbox at the top left of the palette is checked. When this box is checked, changes will be visible in the image being edited. The box can be checked and unchecked for a quick "before-andafter" comparison, allowing you to see whether changes are having the desired effect. The LCH Editor can only be used when the Nikon Color Management system (CMS) is on. If Nikon CMS is off, the tools in the editor will be disabled. To use the LCH Editor with a color space that has the same gamut as uncalibrated RGB data obtained directly from the scanner, turn CMS on and select Scanner RGB as the color-space profile for the RGB color model. Pg. For more information on: 107 Nikon CMS Reference:The Tool Chest 78

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78
The LCH Editor
The LCH Editor models color using three components,
L
umi-
nosity (brightness),
C
hroma (color saturation, or vividness), and
H
ue, each with its own edit display.
The luminosity and chroma
displays take the same form as the curve edit display in the
Curves palette.
By steepening the curve in the luminosity dis-
play, you increase the difference between the bright and dark
portions of the image, increasing contrast.
Steepening the curve
in the chroma window increases color saturation, making col-
ors more vivid.
Both editors feature a histogram display, auto
contrast, and white point, black point, and gray point sliders,
allowing you to match the maximum, minimum, and mid-range
output levels for luminosity and chroma to the values actually
present in the input, making the maximum use of the scanner’s
dynamic range.
They also incorporate output level sliders, mak-
ing it possible to edit the maximum and minimum values for
output.
The hue editor features unique controls that grant unparalleled
flexibility when editing colors.
Using this tool, you can map a
specific range of colors in the input to a different range of col-
ors in the output, allowing you to make the reds in the image
more orange, for example, or even green or blue.
Reference:The Tool Chest
The LCH Editor can only be used when the Nikon Color Man-
agement system (CMS) is on.
If Nikon CMS is off, the tools in
the editor will be disabled.
To use the LCH Editor with a color
space that has the same gamut as uncalibrated RGB data ob-
tained directly from the scanner, turn CMS on and select Scan-
ner RGB as the color-space profile for the RGB color model.
Pg.
For more information on:
107
Nikon CMS
Changes made in the LCH Editor only apply when the check-
box at the top left of the palette is checked.
When this box is
checked, changes will be visible in the image being edited.
The
box can be checked and unchecked for a quick “before-and-
after” comparison, allowing you to see whether changes are
having the desired effect.