genfig9.m

来自「一种基于压缩感知技术的图像重建程序」· M 代码 · 共 31 行

% Figure 9: Signal `Bumps' and its wavelet analysis


n = 2048;
sig0 = MakeBumps(n);

L = 5;
qmf = MakeONFilter('Symmlet',8);
alpha0 = FWT_PO(sig0, L, qmf);

subplot(3,1,1); plot(sig0); 
axis([0 n -2 6]); title('(a) Signal Bumps, m = 2048');
subplot(3,1,2); PlotWaveCoeff(alpha0, L, 0);  
title('(b) Wavelet analysis');
subplot(3,1,3); 
semilogy(reverse(sort(abs(alpha0)))); 
axis([0 n 10^-20 10^5]); 
title(['(c) Coefficient decay (log scale)']);

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% Copyright (c) 2006. Yaakov Tsaig
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% Part of SparseLab Version:100
% Created Tuesday March 28, 2006
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