Just following up to see if anyone out there has any thoughts on my original post below, as my own research into the issue has not gotten me very far. Any help at all will be greatly appreciated.
---------------------------- Original Message ---------------------------- Subject: reaching memory limits with crop method From: "Adam J Smith" <[EMAIL PROTECTED]> Date: Wed, August 31, 2005 10:20 am To: [email protected] -------------------------------------------------------------------------- We are encountering memory errors while processing very large images (over 3Gb TIFFs, 17888x45408 px). We are trying to make "tiles" of the image by calling PIL's crop method and saving the resulting images. Eventually, we see this error: Traceback (most recent call last): File "/insitu1/lavers2/ZoomifyImage/ZoomifyFileProcessor.py", line 135, in ? processor.ZoomifyProcess(sys.argv[1:]) File "/insitu1/lavers2/ZoomifyImage/ZoomifyFileProcessor.py", line 127, in ZoomifyProcess self.processImage() File "/home/lavers2/ZoomifyImage/ZoomifyBase.py", line 199, in processImage imageRow = image.crop([0, ul_y, self.originalWidth, lr_y]) File "/home/lavers2/python/lib/python2.4/site-packages/PIL/Image.py", line 673, in crop self.load() File "/home/lavers2/python/lib/python2.4/site-packages/PIL/ImageFile.py", line 155, in load self.load_prepare() File "/home/lavers2/python/lib/python2.4/site-packages/PIL/ImageFile.py", line 221, in load_prepare self.im = Image.core.new(self.mode, self.size) MemoryError This is on a linux box with 2Gb of RAM, 3Gb of swap space, using PIL 1.1.4. As I understand it, the load() method loads the entire image into memory, and although there appears to be some ways to stream image data through PIL for processing, it looks like you can't use this type of approach with the crop() method. Am I wrong about this, or is there another way to accomplish the same type of thing (saving a region of an image as an image) without using crop()? Thanks in advance for any guidance you can give. ____________________________ adam smith [EMAIL PROTECTED] 255-8893 215 ccc _______________________________________________ Image-SIG maillist - [email protected] http://mail.python.org/mailman/listinfo/image-sig
