16 Oct
2012
16 Oct
'12
11:02 a.m.
I do not have a question on how to use the program, the wiki covered that well.
My question is about the formula embedded in the program to calculate the contrast.
The formula is ((wm-gm)/((wm+gm)/2))*100
This creates a dynamic range of -200 to +200. Which the last time I checked is not really a percent as the command name implies.
Was there some reasoning behind this that I am missing?
Phil Greer University of Pittsburgh