libyuv/README.chromium at c4e032c543c9b3e8a9edcfcb3e5bdc3ceb6800f2 - libyuv - CoffeeCat

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fbarchard@google.com c4e032c543 change Y multiplier and bias to compensate for 257/256 which makes YToARGB exactly match float math.

Histogram Before
hist            -3      -2      -1      0       1       2       3
red             0       0       1809408 13140736        1827072 0       0
green           0       0       1679912 13471329        1625975 0       0
blue            168448  994816  1876480 10655488        1893376 1006336 182272
Histogram After
hist            -3      -2      -1      0       1       2       3
red             0       0       558848  15632128        586240  0       0
green           0       0       209907  16350588        216721  0       0
blue            14848   642816  1989376 11363328        2053120 695040  18688
BUG=394
TESTED=more stringent luma tests
R=brucedawson@google.com

Review URL: https://webrtc-codereview.appspot.com/38859004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1259 16f28f9a-4ce2-e073-06de-1de4eb20be90

2015-02-04 19:45:26 +00:00

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 Name: libyuv
 URL: http://code.google.com/p/libyuv/
 Version: 1259
 License: BSD
 License File: LICENSE
 Description:
 libyuv is an open source project that includes YUV conversion and scaling functionality.