On Thu, 08 Jan 2009 14:18:19 cab...@mail.usask.ca wrote: > I have the need to break a single large image up (3 colour bands) into a > series of smaller images in a grid-like fashion. The code we have written > write now works, but it's really slow - we essentially walk around the > image cropping and loading to return new PIL Image objects. Any > suggestions on a faster way? Should I be using fromBuffer() and pixelaccess > to create my sub-images? I want Image objects as I use a number of PIL > methods after that, I just don't know the fastest way to create them.
Have you tried to convert the PIL image into a NumPy image, and then just use the slicing operations? After getting those sub-arrays as slices convert them back to PIL arrays. Just a thought, as NumPy is actually quite fast, but don't know whether it compares to what you're doing now. Guy -- Guy K. Kloss Institute of Information and Mathematical Sciences Te Kura Pūtaiao o Mōhiohio me Pāngarau Room 2.63, Quad Block A Building Massey University, Auckland, Albany Private Bag 102 904, North Shore Mail Centre voice: +64 9 414-0800 ext. 9585 fax: +64 9 441-8181 eMail: g.kl...@massey.ac.nz http://iims.massey.ac.nz _______________________________________________ Image-SIG maillist - Image-SIG@python.org http://mail.python.org/mailman/listinfo/image-sig
