This allows the gamma values of each of the three color channels of the selected image to be changed. The gamma correction is a special way of increasing contrast designed to improve the contrast in very light or very dark areas. This is achieved by modifying the mean values, particularly the medium-low ones, without affecting either the white (255) or the black (0). It may be used to improve the appearance of an image or to compensate the performance of different devices in the case of an image.
As in previous commands, the correction can be made on the three channels at the same time or on a given color channel (RGB).
A gamma value of 150 is equivalent to the original hue curve. An increase in this value brightens the image and increases the contrast in the darkest areas. A value of under 150 darkens it and emphasizes the contrast in the brighter areas.
The dialogue has the following fields:
Red Channel: to indicate the gamma value for the red channel, it may fluctuate between 10 and 500 and the value 150 is equivalent to the original gamma level of the image.
Green Channel: to indicate the gamma value for the green channel, it may fluctuate between 10 and 500 and the value 150 is equivalent to the original gamma level of the image.
Blue Channel: to indicate the gamma value for the blue channel, it may fluctuate between 10 and 500 and the value 150 is equivalent to the original gamma level of the image
All channels: when changing the value for one of the channels it is reflected for all the others.
TcpMDT
