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Fix broken test case, which used black image

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This commit is contained in:
Johannes Schönberger
2014-07-08 22:16:10 -04:00
parent fd16d9a3fc
commit 5e3d805cf0
1 changed files with 8 additions and 7 deletions
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skimage/transform/tests/test_warps.py
+8 -7
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@@ -99,9 +99,9 @@ def test_homography():
assert_array_almost_equal(x90, np.rot90(x))
def test_fast_homography():
img = rgb2gray(data.astronaut()).astype(np.uint8)
img = img[:, :100]
def fast_homography():
img = img_as_float(rgb2gray(data.lena()))
img = img[:100, :100]
theta = np.deg2rad(30)
scale = 0.5
@@ -115,19 +115,20 @@ def test_fast_homography():
H[:2, 2] = [tx, ty]
tform = ProjectiveTransform(H)
coords = warp_coords(tform.inverse, (img.shape[0], img.shape[1]))
coords = warp_coords(tform, (img.shape[0], img.shape[1]))
for order in range(6):
for mode in ('constant', 'reflect', 'wrap', 'nearest'):
p0 = map_coordinates(img, coords, mode=mode, order=order)
p1 = warp(img, tform, mode=mode, order=order)
p0 = map_coordinates(img, coords, mode=mode, order=order,
prefilter=False, cval=0)
p1 = warp(img, tform, mode=mode, order=order, cval=0)
# import matplotlib.pyplot as plt
# f, (ax0, ax1, ax2, ax3) = plt.subplots(1, 4)
# ax0.imshow(img)
# ax1.imshow(p0, cmap=plt.cm.gray)
# ax2.imshow(p1, cmap=plt.cm.gray)
# ax3.imshow(np.abs(p0 - p1), cmap=plt.cm.gray)
# f.colorbar(ax3.imshow(np.abs(p0 - p1), cmap=plt.cm.gray))
# plt.show()
assert_array_equal(p0, p1)