Nikon 25338, Руководство пользователя

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132
Chapter 21
Edit Menu
BLACK AUTO-CONTRAST CLIP
Set this number to determine the percent-
age of the darkest pixels to exclude when
using the Black Point Dropper within the
Levels & Curves dialog.
WHITE AUTO-CONTRAST CLIP
Set this number to determine the
percentage of the lightest pixels to
exclude when using the White Point
Dropper within the Levels & Curves
dialog.
DROPPER SIZE SAMPLE
Use this option to set the sample size of
the droppers within the Levels & Curves
dialog.
Point Sample
The Point Sample option samples only a
single pixel. This is helpful if you want
to be very precise when selecting a
color and are able to target a pixel of a
specific color.
3x3 Average
The 3 × 3 Average option samples a
total of nine pixels in a grid of three
pixels by three pixels and averages the
colors of each pixel before displaying
the result. Since areas within a photo-
graph are generally made up of small
variations of color, selecting this option
provides a more accurate rendition of
the color of the targeted area.
5x5 Average
The 5 × 5 Average option samples a
total of twenty-five pixels in a grid of
five pixels by five pixels and averages
the colors of each pixel before display-
ing the result. This option is recom-
mended for higher resolution images.
COLOR
Click on the color patch to bring up
the Color Picker and select the color
for the gridlines when the Show Grid
option is enabled. See page 196 for
more information about the Show Grid
option.
GRIDLINE EVERY
Use this option to set the frequency
and the unit of the frequency of the
gridlines when the Show Grid option
is enabled. See page 196 for more
information about the Show Grid
option.
SUBDIVISIONS PER LINE
This option enables you to set subdi-
visions, or smaller gridlines, that are
displayed between the major gridlines
defined by the Gridline Every preference.