[Image-SIG] How do I load and display a 16 bit grayscale image?
Roy H. Han
starsareblueandfaraway at gmail.com
Thu Sep 25 23:53:30 CEST 2008
I'm having some trouble displaying an image and I was wondering if someone
here can help.
Specifically, I loaded a 16 bit grayscale image using the fromstring()
method with mode I;16. When I try to display the image, the entire image is
white with some specks of black. I think it is because PIL thinks that it
is a color image, but I'm not sure.
Is there a way to tell PIL that the 16 bit image is actually grayscale?
The details are that I am opening GeoTIFFs using GDAL and using PIL's
fromstring() to see the resulting images. The multichromatic image seems to
display fine when I view each band individually (PIL's merge doesn't seem to
work for 16 bit images yet). However, the panchromatic image is washed out
in white and I can't see anything. When I open the panchromatic image in
qGIS, however, all the trees are plainly visible.
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