TIFFimage and RGB about pylibtiff HOT 4 CLOSED

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?

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

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.