Forum: Poser - OFFICIAL


Subject: Gamma Correction in Marketplace Products

freemarlie opened this issue on Aug 26, 2010 ยท 39 posts


kawecki posted Sat, 28 August 2010 at 12:11 AM

Quote - Here we go again. It's not enough that people are intimidated. Now, yet again, a thread regarding GC will create MASSIVE confusion because people like kawecki say things like he said.

Please - ignore him.

Here comes again always the same guy, who must be ignored is bagginsbill, he only wants to sell his products.
I am a vendor too, but I am not selling anti-gamma products or work for a company selling anti-gamma devices.

Better get more informed about what is gamma correction and for what are needed and used gamma correction charts.
If we were living in BB's world these charts would be without any use and LCD fabricants were wasting their money in hardware to distort the RGB signal to to revert BB's gamma correction because LCD respond in a linear way and not like a tube.
And the gamma correction used in photography is not the same as in a monitor, color pigments are not a vacuum tube and doesn't obey the same physical laws.
And today who set the standards is China and not the US.

Gamma correction in 8 bit colors cannot be reverted without degrading the image.
8 bit colors have only 256 intensity values and gamma correction have more effect in dark colors that are more nearer the quantize step creating big errors.
If you have an image, then apply gamma correction and then apply anti-gamma correction of the same value the final image never will be equal to the original, it always degrades in the same way as a jpeg image with high levels of compression.
With 16 bit colors or TIFF floating point colors the errors are much less and can be insignificant, but a jpeg image with 1% compression is not the same as a png or bmp image.

Images must be created in a linear way without any distortion, if your monitor has a gamma problem adjust it to compensate its non linearities. If your monitor has not this feature probably your video card has it. In this way your image will look the same in any calibrated monitor.

I am an artist and as any artist I know very well what is a troll and of course, I don't care about he/she/it.

Stupidity also evolves!