structure-tensor-eigvals

structure_tensor_eigvals

skimage.feature.structure_tensor_eigvals(Axx, Axy, Ayy) [source]

Compute Eigen values of structure tensor.

Parameters:

Axx : ndarray

Element of the structure tensor for each pixel in the input image.

Axy : ndarray

Element of the structure tensor for each pixel in the input image.

Ayy : ndarray

Element of the structure tensor for each pixel in the input image.

Returns:

l1 : ndarray

Larger eigen value for each input matrix.

l2 : ndarray

Smaller eigen value for each input matrix.

Examples

>>> from skimage.feature import structure_tensor, structure_tensor_eigvals
>>> square = np.zeros((5, 5))
>>> square[2, 2] = 1
>>> Axx, Axy, Ayy = structure_tensor(square, sigma=0.1)
>>> structure_tensor_eigvals(Axx, Axy, Ayy)[0]
array([[ 0.,  0.,  0.,  0.,  0.],
       [ 0.,  2.,  4.,  2.,  0.],
       [ 0.,  4.,  0.,  4.,  0.],
       [ 0.,  2.,  4.,  2.,  0.],
       [ 0.,  0.,  0.,  0.,  0.]])
doc_scikit_image
2017-01-12 17:23:38
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