spyrit.misc.walsh_hadamard

Walsh-ordered Hadamard tranforms.

Longer description of this module.

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>.

Functions

b2_to_b10(l)	Convert a list of numbers in base 2 to base 10
bit_reverse_traverse(a)
bit_reversed_list(n)
bit_reversed_matrix(n)
fwalsh2_S(X[, ind])	Fast Walsh S-transform of X in "2D"
fwalsh2_S_torch(X[, ind])	Fast Walsh S-transform of X in "2D"
fwalsh_G(x[, ind])	Fast Walsh G-transform of x
fwalsh_G_torch(x[, ind])	Fast Walsh G-transform of x
fwalsh_S(x[, ind])	Fast Walsh S-transform of x
fwalsh_S_torch(x[, ind])	Fast Walsh S-transform of x
fwht(x[, order])	Fast Walsh-Hadamard transform of x.
fwht_torch(x[, order])	Fast Walsh-Hadamard transform of x
get_bit_reversed_list(l)
gray_code_list(n)
gray_code_permutation(n)
ifwalsh2_S(Y[, ind])	Inverse Fast Walsh S-transform of Y in "2D"
ifwalsh_S(s[, ind])	Inverse fast Walsh S-transform of s
iwalsh2(X[, H])	Return 2D inverse Walsh-ordered Hadamard transform of an image
iwalsh2_S(Y[, T])	Inverse Fast Walsh S-transform of Y in "2D"
iwalsh_S(s[, T])	Return the inverse Walsh S-transform of s
iwalsh_S_matrix(n[, H])	Return inverse Walsh S-matrix of order n
perm_matrix_from_ind(l)
sequency_perm(X[, ind])	Permute the rows of a matrix to get sequency order
sequency_perm_ind(n)	Return permutation indices to get sequency from the natural order
sequency_perm_matrix(n)	Return permutation matrix to get sequency from the natural order
sequency_perm_torch(X[, ind])	Permute the last dimension of a tensor to get sequency order
walsh2(X[, H])	Return 2D Walsh-ordered Hadamard transform of an image \(H^\top X H\)
walsh2_S(X[, S])	Fast Walsh S-transform of X in "2D"
walsh2_S_fold(x)	Fold a signal to get a "2d" s-transformed representation
walsh2_S_fold_torch(x)	Fold a signal to get a "2d" s-transformed representation
walsh2_S_matrix(n)	Return Walsh S-matrix in "2d"
walsh2_S_unfold(X)	Unfold a signal from a "2d" s-transformed representation
walsh2_S_unfold_torch(X)	Unfold a signal from a "2d" s-transformed representation
walsh2_matrix(n)	Return Walsh-ordered Hadamard matrix in 2D
walsh2_torch(im[, H])	Return 2D Walsh-ordered Hadamard transform of an image
walsh_G(x[, G])	Return the Walsh S-transform of x
walsh_G_matrix(n[, H])	Return Walsh-ordered Hadamard S-matrix of order n
walsh_S(x[, S])	Return the Walsh S-transform of x
walsh_S_matrix(n[, H])	Return Walsh S-matrix of order n
walsh_matrix(n)	Return 1D Walsh-ordered Hadamard transform matrix
walsh_torch(x[, H])	Return 1D Walsh-ordered Hadamard transform of a signal.