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replaced gradient operation with np.diff

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Brian Holt
2011-09-17 18:55:41 +01:00
parent 207f8661f1
commit 55c77b54df
1 changed files with 2 additions and 8 deletions
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scikits/image/feature/hog.py
+2 -8
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@@ -86,14 +86,8 @@ def hog(image, n_orientations=9, pixels_per_cell=(8, 8),
gx = np.zeros(image.shape)
gy = np.zeros(image.shape)
gx[:-1, :-1] = image[:-1,:-1]-image[:-1,1:]
gy[:-1, :-1] = image[:-1,:-1]-image[1:,:-1]
#gx[:-1, :-1] = np.diff(image, n=1, axis=0)
#gy[:-1, :-1] = np.diff(image, n=1, axis=1)
#import Image
#Image.fromarray(gx).show()
#Image.fromarray(gy).show()
gx[:, :-1] = np.diff(image, n=1, axis=1)
gy[:-1, :] = np.diff(image, n=1, axis=0)
"""
The third stage aims to produce an encoding that is sensitive to