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4 Commits

Author SHA1 Message Date
hui su
7d67a1646d Lossy encoding: smoothen transparent areas to improve compression 
If "exact" is false, we can modify the luma samples in fully transparent
areas to facilitate lossy compression. Experiments on some PNG images
show compression improvement of more than 20%.

Change-Id: I1a728cfa920a6652bc1f600d87c01f7f648c4942
 2017-07-05 10:03:01 -07:00
Pascal Massimino
4689ce1635 cwebp: add a -sharp_yuv option for 'sharp' RGB->YUV conversion 
Change-Id: I6edd5b44d693da50f702fa8218f14872874d91ba
 2017-01-20 16:54:54 +01:00
Pascal Massimino
79bf46f120 rename the pretentious SmartYUV into SharpYUV 
Change-Id: Ifeeb9cb85896c5f3ba0cc1c2c821f8d00295f69e
 2017-01-20 14:36:21 +01:00
James Zern
668e1dd44f src/{dec,enc,utils}: give filenames a unique suffix 
this avoids duplicates between these trees and dsp/, e.g., enc/tree.c,
dec/tree.c, making pulling the whole library source tree into one target
possible

BUG=webp:279

Change-Id: I060a614833c7c24ddd37bf641702ae6a5eef1775
 2017-01-19 19:09:48 -08:00