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0b2b05049f
-> 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