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add -print_psnr and -print_ssim options to cwebp.

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These will report the 7x7-averaged PSNR or SSIM, using the
new internal function WebPPictureDistortion().
This is for information only. These flags have no encoding impact.

+misc opportunistic cosmetics

Change-Id: I64c0a7eca679134d39062e438886274b22bb643f
This commit is contained in:
Pascal Massimino
2012-01-20 07:20:56 -08:00
parent 2e3e8b2ef5
commit d61479f95b
7 changed files with 165 additions and 26 deletions
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6
man/cwebp.1
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@ -168,6 +168,12 @@ Disable all assembly optimizations.
.B \-v
Print extra information (encoding time in particular).
.TP
.B \-print_psnr
Compute and report average PSNR (Peak-Signal-To-Noise ratio).
.TP
.B \-print_ssim
Compute and report average SSIM (structural similarity metric)
.TP
.B \-progress
Report encoding progress in percent.
.TP