This Silicon Optix scaler I have has gamma correction controls. Not adjustable, but four choices, Linear 1.0, gamma 1.5, gamma 2.2 and gamma 2.8 What do the numbers mean? 1.5, 2.2 and 2.8 look way to washed out. Linear looks pretty decent.
That seems like a very silly thing to have in a processor with such hugely useless gamma curves? It would only be useful if you were feeding it a source that was encoded linearly or some other odd gamma encode. Stick with linear, which is confusing because it's not actually linear at all, the source is non-linear, it's just that the processor isn't doing anything with it because the re-linearization, so to speak, occurs at the display. CRTs do it naturally in most all cases (except where there may be electronic tweaks, aka TSE's card, but it's still inherent to the CRT basically), or a linear display (digital) has a LUT that does the degamma.
yes people alter the gamma, but it seems that this device is doing a FULL change of the gamma curve, essentially fully implementing gamma. For instance, when you alter your gamma on your CRT, say to about 2.2, you're only making a change of maybe .2 or .3 from the native encode that is about 2.5.
This processor seems to be implementing a full change or 2.2 when you chose 2.2, based on what chip said about it being unusably washed out. That is, if you fed it a linear, non-gamma corrected source, and choses 2.2, the output would now have a gamma or 2.2. Leaving it in linear leaves the gamma curve intact. It doesn't seem like there is a small adjustment option to move the gamma curve a small amount as you suggest (and I do too!). So here when you choose say 2.2, it's implementing a 2.2 curve on top of whatever the source is.
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