iw.reconstruction

operateur_reconstruction_one_step

iw.reconstruction.operateur_reconstruction_one_step.operateur_reconstruction_one_step()

operateur_reconstruction_one_step function build operator for reconstruction

• Inputs:

Parameters

• L (1d double array) – L is the laplacien matrix

• row_L (1d int_ array) – row array of sparse matrix L

• col_L (1d int_ array) – column array of sparse matrix L

• shape_L (int) – shape of L matrix

• Lbarre (1d double array) – Lbarre matrix

• row_Lbarre (1d int_ array) – row array of sparse matrix Lbarre

• col_Lbarre (1d int_ array) – column array of sparse matrix Lbarre

• shape_Lbarre (int) – shape of Lbarre matrix

• GXbarrebr (1d double array) – GXbarrebr matrix

• row_GXbarrebr (1d int_ array) – row array of sparse matrix GXbarrebr

• col_GXbarrebr (1d int_ array) – column array of sparse matrix GXbarrebr

• shape_GXbarrebr (int) – shape of GXbarrebr matrix

• Xbarre (1d int_ array) – vector of indices corresponding to approximation indices

• qprime (double) – qprime value

• Output:

Returns

tuple of (Rbarre, Rbarre_row, Rbarre_col, Rbarre_shape0, Rbarre_shape1, Rbreve, Rbreve_row, Rbreve_col, Rbreve_shape0, Rbreve_shape1) where Rbarre_matrix are rectangular matrix for approximation operator and Rbreve_matrix for details returned in sparse format

Return type

tuple 9 arrays

tab_reconstruction_multires

iw.reconstruction.tab_reconstruction_multires.tab_reconstruction_multires()

tab_reconstruction_multires function computes the reconstruction of the signal f from their coefficients coeffs

• Inputs:

Parameters

• coeffs (1d array of double) – array of coefficients coefficients

• Struct_Mana_re (1d array of iw.multiresolution.struct_multires_Lbarre.Struct_M_ana_recons) – array of iw.multiresolution.struct_multires_Lbarre.Struct_M_ana_recons class from iw.multiresolution.struct_multires_Lbarre.Tab_Struct_multires_Lbarre.Struct_Mana_re , containing different fields of reconstruction matrix decomposition

• steps (int) – numbers of element present in Struct_Mana_re

• Output:

Returns

double array fbarre reconstruction from the different steps of Struct_Mana_re and coeffs

Return type

1d array of double

tab_compute_multires_coeffs_sparse

iw.reconstruction.tab_compute_multires_coeffs_sparse.tab_compute_multires_coeffs_sparse()

Function tab_compute_multires_coeffs_sparse, computes the sequence of approximation and detail coefficients given the sequence of subgraphs on which the multiresolution is to be computed.

• Inputs:

Parameters

• f (1d double array) – f is the signal vector

• Struct_Mana_re (1d array of iw.multiresolution.struct_multires_Lbarre.Struct_M_ana_recons) – array of iw.multiresolution.struct_multires_Lbarre.Struct_M_ana_recons class containing reconstruction matrix from iw.multiresolution.struct_multires_Lbarre.Tab_Struct_multires_Lbarre.Struct_Mana_re

• steps (int) – number of multiresolution steps

• Output:

Returns

tuple of (coeffs, suite_taille) where coeffs are the coefficients array decomposition of the signal

Return type

tuple of one 1d array of double and one 1d array of int