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Opened 8 years ago
Closed 8 years ago
#716 closed defect (fixed)
Error reading TIFF volume with I;16S image mode
| Reported by: | Owned by: | Tom Goddard | |
|---|---|---|---|
| Priority: | major | Milestone: | |
| Component: | Volume Data | Version: | |
| Keywords: | Cc: | ||
| Blocked By: | Blocking: | ||
| Notify when closed: | Platform: | all | |
| Project: | ChimeraX |
Description
Reading a light microscopy map in 3D TIFF format with I;16S image mode. This is a known bug in Pillow, reported in 2015 but apparently never fixed.
Change History (4)
comment:1 by , 8 years ago
comment:2 by , 8 years ago
Pillow bug report about I;16S from 2014. Comments as of April 2017 don't offer any fix.
comment:3 by , 8 years ago
I compiled Pillow from source code patching 4 files (Pack.c, Unpack.c, Access.c, Storage.c) to partially support the I;16S signed 16-bit pixel values. That allows ChimeraX to read the light microscopy data.
Still considering whether it is worth compiling our own version of the code to handle this obscure format. Also considering whether to make a pull request on the Pillow GitHub code repository to get this change into the main distribution. Probably should do both.
comment:4 by , 8 years ago
| Resolution: | → fixed |
|---|---|
| Status: | assigned → closed |
Added compilation of patched Pillow code to read 16-bit signed data.
Created Pillow pull request at github to get these changes merged into Pillow:
The following Pillow pull request attempted to fix the I;16S TIFF reading but apparently there are serious problems because Pillow does not have adequate support for signed color components, so this fix did not get accepted.
https://github.com/python-pillow/Pillow/pull/1388