Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

VIP Gamma Corrector

Hi, I'm trying to find out what the VIP Gamma Corrector really does. In the application note to the UDX4 High Definition Reference Design (an627.pdf) the Gamma Corrector is used to conver...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

The last time I checked the gamma corrector simply gave you LUT:s to store your mapping values. It's not really a computed transformation so a lack of resolution doesn't apply. You simply exchange values to something else. Rather, you could see this as replacing the last gamma step in your previous chain.

By the way, I don't think you can add/subtrac from gamma without being in non-linear space. The TV/display is going to assume to degamma in non-linear space anyway for further image/color manipulations. If you change gamma in linear space you won't have the desired effect I would think.

Scaling and other video processing of course, in linear space.