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BUG: Fix OTSU thresholding tests with matplotlib IO plugin.

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The matplotlib IO returns float arrays from [0, 1], which gives difference
results than a ubyte array.  Explicitly convert to a ubyte array in the tests.
This commit is contained in:
Matt McCormick
2012-07-20 16:34:07 -04:00
parent c9bef5e06f
commit 4b53c92c14
1 changed files with 6 additions and 3 deletions
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skimage/filter/tests/test_thresholding.py
+6 -3
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@@ -73,11 +73,13 @@ class TestSimpleImage():
def test_otsu_camera_image():
assert threshold_otsu(data.camera()) == 87
camera = skimage.img_as_ubyte(data.camera())
assert threshold_otsu(camera) == 87
def test_otsu_coins_image():
assert threshold_otsu(data.coins()) == 107
coins = skimage.img_as_ubyte(data.coins())
assert threshold_otsu(coins) == 107
def test_otsu_coins_image_as_float():
@@ -86,7 +88,8 @@ def test_otsu_coins_image_as_float():
def test_otsu_lena_image():
assert threshold_otsu(data.lena()) == 141
lena = skimage.img_as_ubyte(data.lena())
assert threshold_otsu(lena) == 141
if __name__ == '__main__':