[Image-SIG] Lanczos interpolation

[Douglas Bagnall]

If you want the downsampling algorithm used by the Gimp and (I think)
Photoshop, try:

def stretch(im, size, filter=Image.NEAREST):
    im.load()
    im = im._new(im.im.stretch(size, filter))
    return im

In 2005 I found it to be a few times quicker than ANTIALIAS resizing,
and the results were better from what I was doing.

(From http://mail.python.org/pipermail/image-sig/2005-May/003310.html)


Douglas