Santorini1010 于 2017.09.12 10:58 提问

matlab实现小波降噪，求解 10C

2个回答

Santorini1010   2017.09.12 11:00

Santorini1010   2017.09.12 11:03

sa = zeros(length(lst) - 1,5);
for ii = 1 : length(lst) - 1;
fprintf('%s\n',lst{ii});
current = data(:,2);
[c,l] = wavedec(current,3,'db4');
[THR,SORH,KEEPAPP,CRIT]=ddencmp('den','wp',current);
[XC,CXC,LXC,PERF0,PERFL2]=wdencmp('gbl',current,'db4',3,THR,SORH,KEEPAPP);
subplot(2,1,1);plot(current);title('原始信号');
subplot(2,1,2);plot(XC);title('使用分层阈值降噪后信号');
per = norm(XC)/norm(current);
err = norm(XC-current);
figure; plot(current,'r');
hold on;
plot(XC,'b');
end

<br />m = imread('C://sdk//t.jpg');<br />colormap('default');<br />subplot(2,2,1), image(m);<br />title('original image');<br />axis('square');<br />[thr, sorh, keepapp] = ddencmp('den', 'wv', m);<br />[xc, cxc, lxc, perf0, perf2] = wdencmp('gbl', m, 'sym4
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