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CaptureNX-D Reference Manual
27
Introduction Viewing Pictures Filters Image Adjustment Other Features Menu Guide
Tool Buttons
LCH
The LCH color space models color using values for
lightness (a property similar but not identical to
brightness or luminance), chroma (color satura-
tion), and hue. These parameters can be accessed
via the channel menu in the image adjustment
palette when the LCH tool is selected.
nMaster Lightness
Adjust overall lightness without aecting
chroma or hue.
q
Auto Contrast: Increase contrast by setting
the white and black points to exclude a set
proportion of the brightest and darkest
pixels in the image.
w
Add Anchor Point: Click this button and then
click the image in the preview palette to
add a point to the curve corresponding to
the lightness of the pixel under the cursor.
e
Reset Current Channel: Reset the master light-
ness curve to linear.
r
Reset All Channel: Reset the master lightness,
color lightness, chroma, and hue curves to
linear.
t
White-point output-level slider: Choose the
maximum output level (white point).
y
Histogram: The histogram shows how the pixels in the image are distributed
with respect to lightness. The horizontal axis corresponds to lightness (in the
range 0–255), the vertical axis to the number of pixels.
qwer
t
y
u
i
o
!0
!1
u
Luminosity curve: The slope and shape of the curve determines the lightness of
the image in the corresponding portion of the tone range.
i
Black-point output-level slider: Choose the minimum output level (black point).
o
Black-point input slider: Choose the minimum (black point) input level.
!0
Gamma: Choose the midpoint (gamma value).
!1
White-point input slider: Choose the maximum (white point) input level.
nColor Lightness
Adjust the lightness of selected colors without
aecting chroma or hue. This can be used, for
example, to brighten the blue of a dark skies.
q
Add Anchor Point: Click this button and then
click the image in the preview palette to
add a point to the curve corresponding to
the value for the pixel under the cursor.
w
Reset Current Channel: Reset the color light-
ness curve to linear.
e
Reset All Channel: Reset the master lightness,
color lightness, chroma, and hue curves to
linear.
r
Color lightness curve: Moving a point on the
curve upwards makes colors in the aected
portion of the color range brighter, while
moving it downward makes the aected
colors darker.
t
Width slider: Adjust the width of the curve that passes through the selected
point, increasing or decreasing the range of colors aected by the change.
qwe
r
t
27


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