enabling noise reduction causes odd behavior with sub-frames

[GoogleCodeExporter]

What steps will reproduce the problem?
1.enable sub-frames
2.enable noise reduction (2x2 mean or 3x3 median)

What is the expected output? What do you see instead?
The sub-frame pixels are displayed very bright, nearly white, even when the 
gamma slider is moved all the way to the right.

This is caused by the noise reduction filter being run over the entire image, 
not just the sub-frame, so the black pixels surrounding the sub-frame "bleed" 
into the edges of the sub-frame and confuse the gamma stretch.

The fix is to run the noise reduction only on the subframe and handle the edges 
of the subframe correctly.

Original issue reported on code.google.com by andy.gal...@gmail.com on 8 May 2014 at 5:21

[GoogleCodeExporter]

Original comment by andy.gal...@gmail.com on 12 May 2014 at 8:36

• Changed state: Started

[GoogleCodeExporter]

This issue was closed by revision r838.

Original comment by andy.gal...@gmail.com on 12 May 2014 at 8:44

• Changed state: Fixed