[Place this text file in the VirtualDub plugins directory]
© Alessandro Malanca - Jul / 2002
This filter allows you to adjust colors in RGB space using an approach similar to the one used in YUV space. Pratically for each RGB= (R,G,B) pixel, Luma is assumed (more or less) as Luma= MIN(R,MIN(G,B)) and chromatic components as : Red= (R-Luma), Green=(G-Luma), Blue= (B-Luma). Here on the usal corrections gain, offset and gamma are applyed to the 4 channels (Luma,R,G,B). Moreover the additional 3 dimensional channel GLOBAL (Red,Green,Blue) allows you to adjust the global color saturation.
This button selects the current channel: luma - global - Red - Green - Blue. Corrections are applied to the selected channel.
Corrects the brightness globally and for red, green or blue colour.
Corrects the gamma (mid tones luminance) globally and for red, green or blue color.
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.
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.