scale color accuracy check

leetaizhu / libyuv

Automatically exported from code.google.com/p/libyuv

BSD 3-Clause "New" or "Revised" License

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scale color accuracy check #401

Open GoogleCodeExporter opened 9 years ago

GoogleCodeExporter commented 9 years ago

When upsampling there is a report that brightness and/or color changes.
To test the accuracy
1. write a unittest that implements a reference scaler
2. do a histogram of color errors and aim for low/zero error versus the 
reference.

Test solid colors with different scale factors and filters
Consider sharing color_test histogram function

Original issue reported on code.google.com by fbarch...@chromium.org on 10 Feb 2015 at 6:25

GoogleCodeExporter commented 9 years ago

Adrian: do you have concrete details for the repro?

Original comment by johannkoenig@google.com on 18 Feb 2015 at 10:29