skal 0b2b05049f Use deterministic random-dithering during RGB->YUV conversion
-> helps debanding (sky, gradients, etc.)

This dithering can only be triggered when using -preset photo
or -pre 2 (as a preprocessing). Everything is unchanged otherwise.

Note that this change is likely to make the perceived PSNR/SSIM drop
since we're altering the input internally.

Change-Id: Id8d4326245d9b828141de162c94ba381b1fa5813
2013-10-17 22:36:49 +02:00
..
2013-08-20 19:59:30 -07:00
2012-11-15 15:55:06 -08:00