Image Enhancements
You have your choice of these image enhancements:
- Spiff
- enhances the intensity differences
between the lighter and darker elements of the image.
- Dull
- reduces the intensity differences
between the lighter and darker elements of the image.
- Equalize
- perform histogram equalization on the image.
- Normalize
- transform image to span the full range of color
values.
- Negate
- replace very pixel with its complementary color
(white becomes black, yellow becomes blue, etc.).
- Hue
- vary the percent hue of the image (0-200%).
- Saturation
- vary the percent saturation of the image (0-200%).
- Brightness
- vary the percent brightness of the image. Reasonable values
extend from 50 (darker) to 150 (brighter).
- Gamma
- level of gamma correction.
The same color image displayed on two different
workstations may look different due to differences in
the display monitor. Use gamma correction to adjust
for this color difference. Reasonable values extend
from 0.8 to 2.3.
You can apply separate gamma values to the red,
green, and blue channels of the image with a gamma
value list delineated with slashes (e.g. 1.7/2.3/1.2).
- Level
- adjust the level of image contrast.
Give three point values delineated with slashes: black, mid, and white
(e.g. 10/1.0/65000). The white and black points range from 0 to MaxRGB
and mid ranges from 0 to 10.