tree 3eedffffa785dbe6b665407e23385b7f71ec11c5
parent 8c449dffa6cdeef3612e2dc292a8f447096abc4e
author yjshen <yjshen@google.com> 1585773387 -0700
committer Damon Shen <yjshen@google.com> 1585954168 +0000

Change metric for motion search in temporal filter

This CL changes the metric used for motion search in temporal filtering.
In particular, the orignal `search error` is replace by MSE (mean square
error) to make the metric more generic to different search block sizes.
Some hyper-parameters used in temporal filtering are also adjusted
accordingly. As a result, the performance is slightly affected.

Experimental results:

Under Speed-4 (two-pass mode):
          avg PSNR   ovr PSNR     SSIM
lowres       0.046      0.034    0.113
lowres2      0.007      0.009   -0.013
midres       0.015      0.022    0.054
midres2      0.026      0.020    0.021
hdres        0.026      0.020   -0.001
hdres2       0.006      0.021    0.008
ugc360p      0.038      0.015    0.018

STATS_CHANGED

Change-Id: Ie4bece483a5a1b82bfb91c39ec5c6b95fed967f9