tree b324577a2f226beda2edbda408a6443a97c6ece3
parent 77079e84399d45fea50708ed391192f894fbfe30
author Cheng Chen <chengchen@google.com> 1577757892 -0800
committer Cheng Chen <chengchen@google.com> 1578359301 +0000

Temporal filter: new function to model control parameter h

h = decay_control * (0.7 + ln(sigma + 0.5))
This change leads to larger decay, i.e., stronger smoothing when
sigma (noise) is larger.

It applies to frame sizes (min of width and height) >= 480.
Lowres and ugc360 set are therefore the same.

Net metric gains are observed.

speed4    avg_psnr    ovr_psnr     ssim      vmaf
midres     -0.08       -0.12      -0.11    -0.12
hdres      -0.34       -0.31      -0.43    -0.23

speed1    avg_psnr    ovr_psnr     ssim      vmaf
midres     -0.02       -0.03      -0.10    -0.14
hdres      -0.25       -0.22      -0.35    -0.00

STATS_CHANGED

Change-Id: Ia232c55412ffee4aa23e9b21890d6bae593154df