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Merged
merged 9 commits into from
May 24, 2013
Merged

Svg rasterize (rebased) #2044

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c39d9dc
fixed: compare_images for older numpy versions. added: backend_pdf al…
Aug 26, 2012
4aa8a58
fix: dpi setting should work now for rasterization in svg backend
Aug 26, 2012
ea5ac65
update for my patch
Oct 3, 2012
1fe4f41
update for my patch
Oct 3, 2012
c5d9b06
api change
May 4, 2013
fb704ec
added test result images
May 17, 2013
dfc1af8
added note to whats_new.rst
May 17, 2013
ea74001
added a note to changelog
May 17, 2013
f288b4e
Update test images
mdboom May 21, 2013
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fixed: compare_images for older numpy versions. added: backend_pdf al… 
…lows numpy.float32 in pdfRepr
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@mdboom
Michael Welter authored and mdboom committed May 24, 2013
commit c39d9dc0932eaaa271225a611d48780a14391dcc
30 changes: 30 additions & 0 deletions lib/matplotlib/testing/compare.py
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Expand Up @@ -306,6 +306,36 @@ def compare_images( expected, actual, tol, in_decorator=False ):
expectedImage = expectedImage.astype(np.int16)
actualImage = actualImage.astype(np.int16)

# compare the resulting image histogram functions
expected_version = version.LooseVersion("1.6")
found_version = version.LooseVersion(np.__version__)

# On Numpy 1.6, we can use bincount with minlength, which is much faster than
# using histogram
if found_version >= expected_version:
rms = 0

for i in xrange(0, 3):
h1p = expectedImage[:,:,i]
h2p = actualImage[:,:,i]

h1h = np.bincount(h1p.ravel(), minlength=256)
h2h = np.bincount(h2p.ravel(), minlength=256)

rms += np.sum(np.power((h1h-h2h), 2))
else:
rms = 0
ns = np.arange(257)

for i in xrange(0, 3):
h1p = expectedImage[:,:,i]
h2p = actualImage[:,:,i]

h1h = np.histogram(h1p, bins=ns)[0]
h2h = np.histogram(h2p, bins=ns)[0]

rms += np.sum(np.power((h1h-h2h), 2))

rms = calculate_rms(expectedImage, actualImage)

diff_image = make_test_filename(actual, 'failed-diff')
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