[EMAIL PROTECTED] ha scritto: > When saving a CMYK file to JPG, PIL seems to invert the colors. I've > submitted a patch to Fredrik already for this, and it should be in the > next major build. > > Adding a simple invert to the image before saving will help.
Thanks all for your responses. Kevin, i've made some tests following what you've suggested and here is the results. To obtain the color inversion i've used the function invert() in ImageChops module. I've added the code and the new sample images in this page (see "part 2"): http://www.bernispa.com/pil/index.html As you can see your suggestion works partially. Images 02 and 03 (that was particular in "part 1") are the only that after the inversion looks ok. All the other images looks less dark, but the color are always different than the original. The particular thing to note is that the images produced by the inversion looks the same as Image.show(). Seems that show() already do the inversion. There is another thing that i have noted only now: the images saved by PIL are often less big than the original. Sometimes much less. For example: test01: 1435 KB test01-dst: 198 KB test01-dst-invert: 198 KB test04: 1237 KB test01-dst: 405 KB test01-dst-invert: 405 KB test08: 1647 KB test01-dst: 777 KB test01-dst-invert: 776 KB test09: 1715 KB test01-dst: 665 KB test01-dst-invert: 665 KB test10: 2032 KB test01-dst: 659 KB test01-dst-invert: 659 KB I can think that PIL optimize the compression, but that difference are really big. Isn't it suspicious? I expect that saving an image in a new file without modifications produces a file very similar to the original, isn't it? The original images was not produced by me so the author can have used low compression. I cannot make tests since i haven't a program that can save in CMYK (Gimp seems not able). Regards. Cesare. _______________________________________________ Image-SIG maillist - Image-SIG@python.org http://mail.python.org/mailman/listinfo/image-sig
