New resizing filters#
Two new filters available for
BOX is the high-performance filter with
two times shorter window than
BILINEAR. It can be used for image reduction
3 and more times and produces a sharper result than
HAMMING filter has the same performance as
BILINEAR filter while
providing the image downscaling quality comparable to
Both new filters don’t show good quality for the image upscaling.
Deprecation Warning when Saving JPEGs#
JPEG images cannot contain an alpha channel. Pillow prior to 3.4.0
silently drops the alpha channel. With this release Pillow will now
DeprecationWarning when attempting to save a
image as a JPEG. This will become an error in Pillow 4.2.
New DDS Decoders#
Pillow can now decode DXT3 images, as well as the previously supported DXT1 and DXT5 formats. All three formats are now decoded in C code for better performance.
Append images to GIF#
Additional frames can now be appended when saving a GIF file, through the
append_images argument. The new frames are passed in as a list of images,
which may be have multiple frames themselves.
Note that the
append_images argument is only used if
save_all is also
in effect, e.g.:
im.save(out, save_all=True, append_images=[im1, im2, ...])
Save multiple frame TIFF#
Multiple frames can now be saved in a TIFF file by using the
im.save("filename.tiff", format="TIFF", save_all=True)
The nominally private/debugging function
been removed. If you were using this function, please use