Originally Posted by Jim McC
alluringreality, can you explain in simple terms the best way to set contrast?
I prefer to use a meter to set contrast.
My display is a Mits. DLP projector, the HC3800. I know the 3 rules of setting contrast(No clipping, no color shifting, no eye strain) but which one takes priority?
Usually you don't have to worry about eye strain on most projectors, so clipping or color shift would be the main consideration. Clipping and color shift are typically related on most displays. What I mean is that if red clips before green and blue you will have a color shift away from red. Typically the color shift will happen where the color clips or a few levels lower. If you can objectively judge color shift, then probably use color shift as the primary consideration. When judging color shift it would make sense to use something like the grayscale ramp or APL clipping pattern, to limit the amount of information above reference white.
My projector is clippping red. Do I reduce contrast until clipping disappears(-12)? Or do I raise contrast until pinkish color shift starts(-4)? Or do I disregard both of these things and go with the result of the contrast pattern, which is pinkish(17)? Thanks.
If the projector is subjectively bright enough for you, use the most conservative setting of -17. If you prefer to make the image brighter, use the higher setting of -4. It sounds like 17 may be too high and introduces color shift or has negative effects on the color patterns in Misc. Patterns A.