Function WAVELET_LAYER_2D_PYRAMID

Package

Short description

Usage

   [U_phi, U_psi] = wavelet_layer_2d_pyramid(U, filters, options) 

Input

   U (struct): a scattering layer
   filters (struct): a 2d filter bank
   options (struct): same as for WAVELET_2D

Output

   U_Phi (struct): low pass convolutions of all signal of U
   U_Psi (struct): high pass convolutions of all signal of U

Description

   This function computes the 2d wavelet transform of each signal of the
   input layer U. Convolutions with low pass filter are stored in U_phi
   while convolutions with high pass filters are stored in U_psi.
   It is similar to WAVELET_LAYER_2D but uses a WAVELET_2D_PYRAMID, a
   pyramid implementation of the 2d wavelet transform which is faster and
   better deals with boundary effect.

See also

• scat
• wavelet_factory_2d_pyramid
• wavelet_2d_pyramid