imshow() extent issues with svn and 0.98.0

Hi (Eric?),

Re-running an older script of mine today, I notice a change of behavior
with imshow(). The script below produces the attached 2 figures for MPL
0.91.3 and svn from today (labeled "0.98.0"). I believe that the
behavior of 0.91.3 was correct -- the image is not cropped, its aspect
ratio is maintained, and the data coordinates correspond to the pixel
coordinates. I am also including the original image used in this example.

import matplotlib, pylab
import Image

im = Image.open('eye_map.gif')
im_extent = (0, im.size[0], 0, im.size[1])
pylab.imshow(im,origin='lower',
             extent=im_extent,
             aspect='equal')
fname = 'extent_bug_%s.png'%matplotlib.__version__
pylab.savefig(fname)

Please let me know if I can do more. Note that I have shifted the image
mode to an 8-bit palette for the .pngs with GIMP to save space in this
email, but otherwise the images are exactly as emitted by MPL.

Thanks,
Andrew

eye_map.gif

extent_bug_0.91.3.png

extent_bug_0.98.0.png

Andrew,

Yes, and it looks like there is more to it: the draw() method doesn't seem to be working (or getting called at the right time) in interactive mode, but no exception is being raised, either. I will look into it.

Eric

Andrew Straw wrote:

···

Hi (Eric?),

Re-running an older script of mine today, I notice a change of behavior
with imshow(). The script below produces the attached 2 figures for MPL
0.91.3 and svn from today (labeled "0.98.0"). I believe that the
behavior of 0.91.3 was correct -- the image is not cropped, its aspect
ratio is maintained, and the data coordinates correspond to the pixel
coordinates. I am also including the original image used in this example.

import matplotlib, pylab
import Image

im = Image.open('eye_map.gif')
im_extent = (0, im.size[0], 0, im.size[1])
pylab.imshow(im,origin='lower',
             extent=im_extent,
             aspect='equal')
fname = 'extent_bug_%s.png'%matplotlib.__version__
pylab.savefig(fname)

Please let me know if I can do more. Note that I have shifted the image
mode to an 8-bit palette for the .pngs with GIMP to save space in this
email, but otherwise the images are exactly as emitted by MPL.

Thanks,
Andrew

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