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.]])