Thanks all for your help. The code generates a large image from many small ones.
So I'll just scale each image individually before collaging them. .b. Gregor Kopka wrote: > Hello, > > to process a ~ 25GB (uncompressed image data) you are afaik out of luck > with PIL. > Only chance would be to use a fairly recent 64 bit OS with 64 bit python > binaries (some custom patches /might/ be needed though) and give it a > hefty amount of swapspace (at least eight times main memory) to fit the > image into virtual memory, but then you would wait for the disk for > hours (at best) or - depending on the operations you want to perform - > way longer. > > The question of how to open the resulting image also arises... > > Since you didn't give any details on what you need as output format, or > the operations you want to perform on the image while in memory (or > whereever it might be at that point) it's hard to give any better clues. > > Regards, > > Gregor > > B. Bogart schrieb: >> Hello all, >> >> I want to create a very large RGBA image (96000x72000 pixels). >> >> I have 4GB of RAM. >> >> Is there an easy way of getting around this error by having PIL only >> allocate one section of the image at a time? >> >> If PIL does not have any internal trick to work with large images then >> I'll have to make 4+ smaller images one at a time, but then I'm not sure >> how I could combine them without needing to allocate a memory chunk for >> the whole image. >> >> Otherwise I suppose I'll have to try with some other language, perhaps >> C/SDL, though a quick calculation seems to show that such a large RGBA >> image is just unworkable. Is there some way of using disk space rather >> than memory? Does not matter if it is slow, just that it is possible! >> >> Any advice? >> >> Thanks, >> B. >> _______________________________________________ >> Image-SIG maillist - Image-SIG@python.org >> http://mail.python.org/mailman/listinfo/image-sig >> >> _______________________________________________ Image-SIG maillist - Image-SIG@python.org http://mail.python.org/mailman/listinfo/image-sig
