fastslantstack_pre.m

来自「beamlet变化的工具箱」· M 代码 · 共 33 行

function S = FastSlantStack_pre(X)
% FastSlantStack: Radon Transform for Discrete Data
%  Usage:
%     S = FastSlantStack(X)
%  Inputs:
%    X      n*n matrix (x,y)
%  Outputs:
%    S      2n*2n matrix (t,theta)
%  Description:
%    Sums array along lines.
%
	Pre = 2; % No preconditioning
	P = PseudopolarFFT(X,Pre).';
	P = fftshift1d(P);
	S = fftshift1d(ifft(P));
%
%	Copyright (c) 2000. Amir Averbuch and David Donoho
%

%
% Part of BeamLab Version:200
% Built:Friday,23-Aug-2002 00:00:00
% This is Copyrighted Material
% For Copying permissions see COPYING.m
% Comments? e-mail [e-mail]
%
%
% Part of BeamLab Version:200
% Built:Saturday,14-Sep-2002 00:00:00
% This is Copyrighted Material
% For Copying permissions see COPYING.m
% Comments? e-mail [e-mail]
%