spyrit.misc.walsh_hadamard.walsh2_S_unfold_torch

spyrit.misc.walsh_hadamard.walsh2_S_unfold_torch(X)

Unfold a signal from a “2d” s-transformed representation

Note: Return a view of X

Args:

X (torch.tensor): input image with shape (*, n,n).

Returns:

output signal with shape (*, n*n-1)

Example 1:

>>> import spyrit.misc.walsh_hadamard as wh
>>> import torch
>>> X = torch.tensor([[1, 3, 0, 8],[7, 5, 1, 2]])
>>> x = wh.walsh2_S_unfold_torch(X)
>>> print(X)
>>> print(x)

Example 2:

>>> import spyrit.misc.walsh_hadamard as wh
>>> import torch
>>> X = torch.randint(10,(3,4,4))
>>> x = wh.walsh2_S_unfold_torch(X)
>>> print(X)
>>> print(x)