[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
