bpdq_fft_subsample_t : Transpose of operation bpdq_fft_subsample r=bpdq_fft_subsample_t(x,ind,dim) Computes transpose of fft_subsample Inputs: x - input signal (complex vector same size as ind) ind - indices of desired Fourier coefficients dim - image size Outputs: r - returned transpose, will be vector of size prod(dim) x 1 This file is part of BPDQ Toolbox (Basis Pursuit DeQuantizer) Copyright (C) 2009, the BPDQ Team (see the file AUTHORS distributed with this library) (See the notice at the end of the file.)
0001 % bpdq_fft_subsample_t : Transpose of operation bpdq_fft_subsample 0002 % 0003 % r=bpdq_fft_subsample_t(x,ind,dim) 0004 % Computes transpose of fft_subsample 0005 % 0006 % Inputs: 0007 % x - input signal (complex vector same size as ind) 0008 % ind - indices of desired Fourier coefficients 0009 % dim - image size 0010 % 0011 % Outputs: 0012 % r - returned transpose, will be vector of size prod(dim) x 1 0013 % 0014 % This file is part of BPDQ Toolbox (Basis Pursuit DeQuantizer) 0015 % Copyright (C) 2009, the BPDQ Team (see the file AUTHORS distributed with 0016 % this library) (See the notice at the end of the file.) 0017 0018 function r=bpdq_fft_subsample_t(x,ind,dim) 0019 N=length(x); 0020 rdft=zeros(dim); 0021 rdft(ind)=x; 0022 r=ifft2(ifftshift(rdft)); 0023 r=r*prod(dim); % fft normalization 0024 r=r(:); 0025 0026 % The BPDQ Toolbox is free software: you can redistribute it and/or modify 0027 % it under the terms of the GNU General Public License as published by 0028 % the Free Software Foundation, either version 3 of the License, or 0029 % (at your option) any later version. 0030 % 0031 % The BPDQ Toolbox is distributed in the hope that it will be useful, 0032 % but WITHOUT ANY WARRANTY; without even the implied warranty of 0033 % MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 0034 % GNU General Public License for more details. 0035 % 0036 % You should have received a copy of the GNU General Public License 0037 % along with The BPDQ Toolbox. If not, see <http://www.gnu.org/licenses/>.