tree 5c672bb9a4d1f090f81fa0c8cc048ee13c8604ff
parent aa6a1b0914a2bdb5c41539697aa4cff4fb1af161
author Sai Deng <sdeng@google.com> 1600381469 -0700
committer Debargha Mukherjee <debargha@google.com> 1601149470 +0000

Add variance based pre-processing parameter selection

Taking into account the variance change to predict the vmaf_neg
distortions during pre-processing stage, this CL improves BD-rate of all
core metrics in mode tune=vmaf_neg:

                 PSNR   SSIM   VMAF   VMAF_NEG
midres          -1.22  -0.56   0.68     -0.54
hdres           -0.96  -0.94   1.02     -0.50
lowres_10bd     -2.70  -1.37   1.64     -1.16
midres_10bd     -1.99  -0.90   2.25     -0.64

Change-Id: I45db6a2ed53972b42cb58ee525c09f54e421970e
(cherry picked from commit 282fad4cb3deec8157d335c563b87395d1eb8ae2)