[ImageJ-bugs] [Bug 977] PNG wrong pixel values

[bugzilla at fiji.sc]

http://fiji.sc/bugzilla/show_bug.cgi?id=977

Curtis Rueden <ctrueden at wisc.edu> changed:

           What    |Removed                     |Added
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             Status|NEW                         |CONFIRMED
                 CC|                            |ctrueden at wisc.edu

--- Comment #2 from Curtis Rueden <ctrueden at wisc.edu> ---
I can reproduce this issue on OS X with Apple Java 1.6.0_65 as well as with
Oracle Java 1.7.0_45. So it is unlikely to be a platform-specific issue
decoding PNG data.

In my brief investigation, some pixels are off by 1; e.g.:

  SCIFIO: x=374, y=331, value=193,133,012 (#c1850c)
 ImageJ1: x=374, y=331, value=192,132,012 (#c0840c)

The Bio-Formats plugin (from which the SCIFIO APNG code originated) also has
values matching ImageJ1, meaning that either A) SCIFIO introduced a regression
at some point; or B) Bio-Formats has since fixed this bug.

Will keep you posted on any progress.

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