Scott, I appreciate the quick response, but I need this in a GIF format.
Samuel On Oct 21, 3:46 pm, Scott David Daniels <[EMAIL PROTECTED]> wrote: > [EMAIL PROTECTED] wrote: > > ...I need to scale a TIFF image from 1925x588 px to a GIF of 600xnnn px. > > I've tried the following code, but it leads to a lot of extra odd > > colored pixels being inserted into the resulting image. > > img = "tmp/tmsho20080901.tif" > > im = Image.open("tmp/tmsho20080901.tif") > > w, h = im.size > > im.thumbnail((600, h * 600 / w), Image.ANTIALIAS) > > This line is rather silly, making a result that you drop on the floor.> > newimg = im.resize((600, int(h * (600.0 / w))), Image.ANTIALIAS) > > newimg.save("tmsho20080901.gif") > > ... > > > Using ImageMagick's convert I would do this... > > > convert -colors 256 -resize 600 -colorspace RGB -black-threshold 100 - > > contrast -intent Perceptual tmp/tmsho20080901.tif tmsho20080901.gif > > > I think it may have something to do with the palette or the number of > > colors alotted for the resulting image, but I'm really not a graphics > > guy. > > Yep, you are right. The issue is trying to reduce to a 256-color > pallette. Try using '.png' format (portable network graphics), that > allows a full palette for exact pixel images. > > Try something like this: > im = Image.open("tmp/tmsho20080901.tif") > w, h = im.size > im.thumbnail((600, h * 600 // w), > Image.ANTIALIAS).save("tmp/sho20080901.png") > > --Scott David Daniels > [EMAIL PROTECTED] -- http://mail.python.org/mailman/listinfo/python-list