1033124 - YCbCr->RGB conversions use incorrect coefficients

Status: RESOLVED FIXED

(Core :: Graphics, defect)

Description

[Kelsey Gilbert [:jgilbert]]

Attachment: rec601.py

In investigating bug 814524, I found that our shaders for YCbCr->RGB conversion use inaccurate coefficients.

I created a Python script which takes the RGB luma coefficients from Rec601 (SDTV YCbCr), and generated first the RGB->YCbCr matrix, then inverting it to get the YCbCr->RGB matrix.

Comment 1

[Kelsey Gilbert [:jgilbert]]

Attachment: rec601

Comment 2

[Bas Schouten (:bas.schouten)]

Comment on attachment 8449114 [details] [diff] [review]
rec601

Review of attachment 8449114 [details] [diff] [review]:
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I doubt this'll change practical output, but sure! :)

Comment 3

[Kelsey Gilbert [:jgilbert]]

  https://hg.mozilla.org/integration/mozilla-inbound/rev/4547aaf5d648

Comment 4

[Carsten Book [:Tomcat]]

https://hg.mozilla.org/mozilla-central/rev/4547aaf5d648