HistEQ

Remap colors using blended histogram weights. Figure 10.45 shows the GUI and the results in a split screen.

Figure 10.45: Control window and split screen
Image histeq

Histeq equalizes the colorspace through use of a histogram equalization algorithm – a technique for adjusting image intensities to enhance contrast. Parameters are:

Gain:
when set to 1, the colorspace is best effort. If the gain is set to 0, the result is the entire regression line of the color map.
Blend:
goes between a straight and a twisted line.
Split output:
diagonally shows in the compositor, the new results on the left and old on the right.
Plot bins/lut:
displays a plot of the result.

The CINELERRA-GG Community, 2021
https://www.cinelerra-gg.org