python-pillow/Pillow — pull request #933 by hugovk (2014-10-01 09:55:36+00:00)
Title: Support for 4-bit greyscale TIFF images

* Test image from depth\flower-minisblack-04.tif of ftp://ftp.remotesensing.org/pub/libtiff/pics-3.8.0.tar.gz. The directory's README.txt says:

> These sample TIFF image files are prepared by Bob Friesenhahn ... using a development version of GraphicsMagick 1.2. ...

> These files are hereby placed in the public domain.

* Add `(II, 1, 1, 1, (4,), ()): ("L", "L;4")` to TiffImagePlugin.py's `OPEN_INFO` dict to support it.
* With test case.
* flake8.
* Closes #932.