Pillow and JPEG2000: decoder jpeg2k not available

Question

I\'m trying to set up Flask-IIIF to work with jp2-files, or JPEG2000. Right out of the box I get an error from the Pillow library: IOError: decoder jpeg2k

Answer 1

Pillow needs the OpenJPEG library to decode JPEG2000 files. libjpeg only deals with regular JPEGs.

See the note in the Pillow docs at the end of this section: http://pillow.readthedocs.io/en/latest/handbook/image-file-formats.html#jpeg-2000