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7.1.0

API Changes

Allow saving of zero quality JPEG images

If no quality was specified when saving a JPEG, Pillow internally used a value of zero to indicate that the default quality should be used. However, this removed the ability to actually save a JPEG with zero quality. This has now been resolved.

from PIL import Image
im = Image.open("hopper.jpg")
im.save("out.jpg", quality=0)

API Additions

Reading JPEG comments

When opening a JPEG image, the comment may now be read into :py:attr:`~PIL.Image.Image.info`.

New channel operations

Three new channel operations have been added: :py:meth:`~PIL.ImageChops.soft_light`, :py:meth:`~PIL.ImageChops.hard_light` and :py:meth:`~PIL.ImageChops.overlay`.

Other Changes

If present, only use alpha channel for bounding box

When the :py:meth:`~PIL.Image.Image.getbbox` method calculates the bounding box, for an RGB image it trims black pixels. Similarly, for an RGBA image it would trim black transparent pixels. This is now changed so that if an image has an alpha channel (RGBA, RGBa, PA, LA, La), any transparent pixels are trimmed.