Virtual Dub - Colors, Brightness, Contrast and Gamma

[Place this text file in the VirtualDub plugins directory]
© Alessandro Malanca - Jul / 2002

This filter allows correcting the colors brightness, gamma and contrast. A histogram shows the distribution of pixel values globally and for each color. Controls are not as much sensitive; if you need more correction just ask.


Select Channel:

This button selects the current channel. It can be : global - Red - Green - Blue. Corrections are applied to the selected channel.


Brightness sliders:

Corrects the brightness globally and for red, green or blue colour.


Gamma sliders:

Corrects the gamma (mid tones luminance) globally and for red, green or blue colour.


Contrast sliders:

Corrects the contrast globally and for red, green or blue colour.

Balance media: This value is the reference point for brightness control. Values above are incremented, and below are decremented. You can also set it to 0 to have the usual contrast control.


Colors histogram:

In preview mode, shows the distribution of pixel values from 0 to 255; globally and for red, green or blue.

Max: is the amount of points indicated by the histogram max value.