16-bit TIFF files cannot be converted to array

[tdsmith]

Example data file: https://dl.dropboxusercontent.com/u/3720/junk/12bit.tif (a 16-bit TIFF container with pixel values spanning a 12-bit range, which is common in scientific imaging)

Opening the file with Image.open works:

>>> im, im.mode
(<PIL.TiffImagePlugin.TiffImageFile image mode=I;16 size=1344x1024 at 0x1074A2518>, 'I;16')

Attempting to convert the Image object to an array just encapsulates it:

>>> np.array(im)
array(<PIL.TiffImagePlugin.TiffImageFile image mode=I;16 size=1344x1024 at 0x1074A2518>, dtype=object)

This is a 1x1 array containing an Image object. I was expecting to have a 1344x1024 array containing 16-bit integer values.

[wiredfool]

Perhaps related, I seem to remember that 1 bit images have issues getting turned into bit nd arrays. The workaround I hit at the time was to convert them into 8 bit ndarrays with values 0 or 255.

[aclark4life]

Anything for 2.2.0 here @wiredfool ?

[aclark4life]

Meh, this can wait for 2.3.0 or Future IMHO

[wiredfool]

Fixed by #347.