User Guide

242
Chapter 9

If the number of colors in the chart exceeds the number of colors for that depth,
the colors w
ill be dithered to replicate the colors in the chart.
 Current scr
een depth
is the number of colors currently displayed on your computer
monitor.
Color Operations. The following operations are available:
 Invert. Each pixel is saved as the inverse of the original color.
 Gamma correction. Adjusts the intensity of colors in the exported chart by
changing the gamma constant that is used to map the intensity values. Basically,
it can be use
d to lighten or darken the bitmapped image. The value can range
from 0.10 (darkest) to 6.5 (lightest).
Use RLE compression. (BMP only.) A lossless compression technique supported by
common Win
dows file formats. Lossless compression means that image quality has
not been sacrificed for the sake of smaller files.
PNG and TIF
F Chart Export Options
Color Dept
h.
Determines the number of colors in the exported chart. A chart saved
under any depth will have a minimum of the number of colors actually used and a
maximum of the number of colors allowed by the depth. For example, if the chart
contains
three colors—red, white, and black—and you save it as 16 colors, the chart
will remain as three colors.
 If the number of colors in the chart exceeds the number of colors for that depth,
the colo
rs will be dithered to replicate the colors in the chart.
 Current
screen depth
is the number of colors currently displayed on your computer
monitor.
Color Operations. The following operations are available:
 Invert. Each pixel is saved as the inverse of the original color.
 Gamma correction. Adjusts the intensity of colors in the exported chart by
changing the gamma constant that is used to map the intensity values. Basically,
it can be
used to lighten or darken the bitmapped image. The value can range
from 0.10 (darkest) to 6.5 (lightest).