Pascal Massimino 2f51b614b0 introduce WebPPlaneDistortion to compute plane distortion
Make WebPPictureDistortion() only compute distortion on A/R/G/B planes, not Y/U/V(A).
(not just for SSIM, but PSNR too).

This is to avoid problems with using SSIM on U/V channels.
If Y/U/V distortion is needed, one can always use WebPPlaneDistortion() individually.

Change-Id: If8bc9c3ac12a8d2220f03224694fc389b16b7da9
2016-10-19 09:12:13 +02:00
..
2014-10-22 17:25:41 +02:00
2010-11-17 20:09:47 -08:00