On Wed, 2016-10-12 at 10:08 +0200, Deixis wrote: > Does anyone know any tricks on how to resize extremely large images? > I can't > even open this computer generated .PNG.
I'm going to guess you are using a Linux system in this answer. Life is too short for me to try telepathy. If you run the file command on the image file in a terminal, file foo.png or identify foo.png do you get a size in pixels? I routinely open 10,000 x 20,000 pixel images in gimp. A good rule of thumb is the amount of memory you need will be width * height * 4 (assuming an 8-bit colour image) in bytes, e.g. for a 100,000 x 37,000 pixel image it's 100000 * 37000 * 4 which gives 14800000000 bytes dividing by 1024 * 1024 (megabytes) gets 14114 megabytes and dividing that by 1024 gives 13.7 gigabytes. So to open this (fictional) image you'd want probably 16G of RAM or more in your 64-bit computer. On a 32-bit computer you'd want at least 20GBytes of swap. The size of the image file on disk just reflects how well or badly the PNG compression has worked, but if it's worked well, the image could easily need over 100G of memory, which you could do by adding a large amount of swap space and being very patient. Without more information about the image and your setup it's hard to guess and give more advice on which tools would be best. Liam _______________________________________________ gimp-user-list mailing list List address: gimp-user-list@gnome.org List membership: https://mail.gnome.org/mailman/listinfo/gimp-user-list List archives: https://mail.gnome.org/archives/gimp-user-list