Doctor M said:

red5-626 said:

OK! There is a lot I do not Know.

For one I thought that THX optimizer was specific to the movie it was on. When I would watch the GOUT I would use the GOUT THX optimizer if I watch the 2004 DVD I would use the 2004 DVD THX optimizer. Are all the optimizer’s the same?

No, your first statement is correct. All the optimizers should be different to some degree.

The mind set behind THX is that the optimizer is passed through the same transfer process to the disc as the movie is. As a result any variation that occurs in the film will similarly happen to the Optimode allowing you to compensate.

Whether this is still true or not is anyone's guess, but it was at its inception.

And I don't know anyone crazy enough to recalibrate their TV every time they put a different movie on.

They might look different on different DVDs/Blu-rays, but there is only one reference for the greyscale for HDTV and that's D65, and for the color it's called Rec709. Because of this, the greyscale patterns and color/tint setting patterns can't be different, or it would make you set the wrong settings.

You can't set your screen to those references by using a THX optimizer but you can reach a correct setting on brightness, contrast, color and tint. Some people say you can set gamma correctly by using those patterns but that can't be done by eye. I know that from trying myself, and comparing with the result when using a colorimeter.

And Doctor M: I know the tweak settings for avisynth, but the plugin selective color is much better when changing each color separately. I've used tweak for that before and usually it results in blocking and weird artefacts in different scenes.

And I won't change reds anyway, since not all scenes have such strong skintones, and the ones with less saturated skin would come out as having too little color in them. I found a good balance and both me and DJ are happy with it. :)