Tim Eichholz wrote:
> I'm trying to cut a BMP with 80 adjacent frames down to 40 using the
> Image.copy and .paste functions but I'm getting error "ValueError:
> images do not match" on the paste line.
> newimage.paste(cols[f], (f*framew, 0, (f*framew)+192, 192))
The 4-tuple doesn't match the size of the image you are pasting:
>>> from PIL import Image
>>> image = Image.open("tmp1.png")
>>> image.size
(134, 400)
>>> image.paste(image, (0, 0, 134, 400)) # correct size --> works
>>> image.paste(image, (0, 0, 134, 300)) # wrong size --> raises exception
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/usr/lib/python2.6/dist-packages/PIL/Image.py", line 1077, in paste
self.im.paste(im, box)
ValueError: images do not match
You can add
for index, image in enumerate(cols):
print "image %d --> %s" % (index, image.size)
# image.save("tmp%d.png" % index)
to your code to learn the actual size of your intermediate images.
After you have fixed the size problem and see that the resulting image
doesn't meet your expectations (likely, don't despair) you can uncomment the
image.save(...) statement and have a look at the intermediate images.
A hint about counting loops: instead of
x = 0
while x < n:
...
x = x + 1
it is idiomatic python to write
for x in range(n):
...
and
x = 0
while x < total_width:
# ...
x += single_width
is typically expressed as
for x in range(0, total_width, single_width):
...
Have a look at the tutorial for more basic tips.
Peter
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