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The Tool Chest — The LCH Editor

The LCH Editor

Editing Colors

The LCH Editor models color using three components: Light-

ness (brightness), Chroma (color saturation, or vividness),

and Hue. Each component has its own edit display. Lu-

minosity and chroma are represented by curves, which can

be edited in much the same way as the tone curves in the

“Curves” palette. Steepening the luminosity curve increases

the difference between bright and dark portions of the

image, increasing contrast. Steepening the chroma curve

increases color saturation, making colors more vivid. Both

editors feature histograms, auto contrast, and white, black,

and gray-point sliders. Output sliders are also available to

edit the maximum and minimum values for output.

The “LCH Editor” Palette

The “LCH Editor” palette can be used in both the scan window and in

image windows.

The “Apply” Button

Changes to the LCH Editor only apply when the button at the top left

corner of the “LCH Editor” palette is checked. When this button is

checked, changes to settings will be reﬂ ected in the image in the active

window. The box can be checked and unchecked for a quick “before-

and-after” comparison to determine whether changes to settings are

having the desired effect.

The hue editor features unique controls for unparalleled ﬂ ex-

ibility when editing colors. Using this tool, a speciﬁ c range

of input colors can be mapped to another range of output

colors. This allows all the reds in the image, for example, to

be made more orange, or even green or blue.

The desired editor is selected from the menu at the top of

the “LCH Editor” palette.

Nikon Color Management (

78)

The LCH Editor is only available when the Nikon Color Management Sys-

tem (CMS) is on. If Nikon CMS is off, the tools in the “LCH Editor” pal-

ette 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 the Scanner RGB color-space proﬁ le.

Editor menu

Apply button