TIFFimage and RGB

[GoogleCodeExporter]

is it possible to write RGB tiff files by means of python module ?

i can only obtain a GRAY file with width multiplied by 3.

i quickly read sources and i don't understand how to set photometric and 
samplesperpixel tags.

Original issue reported on code.google.com by tre...@gmail.com on 23 Aug 2011 at 10:28

[GoogleCodeExporter]

It should be easy to add RGB support to TIFFimage.
For that the TIFFimage.write_file needs to be updated
such that PhotometricInterpretation=2 and SamplesPerPixel = 3.

The question is how the RGB data is stored in a numpy
array and how the pylibtiff code can recognise it as RGB.

Perhaps the easiest way would be to add rgb=False
kw option to TIFFimage.write_file and use proper
PhotometricInterpretation and SamplesPerPixel when rgb is True.

Can you test it and send a patch if it works?

Original comment by pearu.peterson on 23 Aug 2011 at 11:00

• Added labels: Type-Enhancement
• Removed labels: Type-Defect

[GoogleCodeExporter]

here is the patch, it seems to work. i added some comments, excuse my english.

Original comment by tre...@gmail.com on 23 Aug 2011 at 5:40

Attachments:

• tiff_image_RGB.patch

[GoogleCodeExporter]

Btw, we have now the rgb writing support implemented, with slightly different 
from the given patch. See test_rw_rgb in 

http://code.google.com/p/pylibtiff/source/browse/trunk/libtiff/tests/test_tiff_i
mage.py

for examples.

Original comment by pearu.peterson on 8 Nov 2011 at 8:52

• Changed state: Accepted

[GoogleCodeExporter]

Original comment by pearu.peterson on 13 Sep 2014 at 10:05

• Changed state: Done