二維小波分解報告

1、精選優(yōu)質(zhì)文檔-傾情為你奉上對圖像二維信號進行3層小波分解。解：本題二維圖像采用MATLAB自帶的圖片,實現(xiàn)圖片多層小波分解的函數(shù)是：C,S=wavedec2(X,N,wname) , 即使用給定小波wname對二維信號X進行N層小波分解。本題使用bior3.7小波進行分析。重構(gòu)二維小波信號的低頻成分函數(shù)為：A1=wrcoef2('a',C,S,'wname',N);重構(gòu)二維小波信號的水平、垂直和對角線高頻成分函數(shù)為：H1=wrcoef2(h,C,S,wname,N);V1=wrcoef2('v',C,S,wname,N);D1=wrcoef2(&

2、#39;d',C,S,wname,N);實現(xiàn)二維信號3層小波分解的MATLAB代碼如下：clear all;clc;%裝載圖像load woman;%顯示原始圖像image(X);colormap(map);nbcol=size(map,1)%進行3層小波分解C,S=wavedec2(X,3,'bior3.7');%重構(gòu)低頻信號A1=wrcoef2('a',C,S,'bior3.7',1);A2=wrcoef2('a',C,S,'bior3.7',2);A3=wrcoef2('a',C,S,

3、'bior3.7',3);%重構(gòu)高頻信號H1=wrcoef2('h',C,S,'bior3.7',1);V1=wrcoef2('v',C,S,'bior3.7',1);D1=wrcoef2('d',C,S,'bior3.7',1);H2=wrcoef2('h',C,S,'bior3.7',2);V2=wrcoef2('v',C,S,'bior3.7',2);D2=wrcoef2('d',C,S,'

4、bior3.7',2);H3=wrcoef2('h',C,S,'bior3.7',3);V3=wrcoef2('v',C,S,'bior3.7',3);D3=wrcoef2('d',C,S,'bior3.7',3);%顯示3層二維分解結(jié)果figure(3)colormap(map);subplot(4,3,1);image(wcodemat(A1,nbcol);title('低頻A1')subplot(4,3,4);image(wcodemat(H1,nbcol);title

5、('水平高頻H1')subplot(4,3,7);image(wcodemat(V1,nbcol);title('´垂直高頻V1')subplot(4,3,10);image(wcodemat(D1,nbcol);title('對角高頻D1')subplot(4,3,2);image(wcodemat(A2,nbcol);title('低頻A2')subplot(4,3,5);image(wcodemat(H2,nbcol);title('水平高頻H2')subplot(4,3,8);image(wcod

6、emat(V2,nbcol);title('垂直高頻V2')subplot(4,3,11);image(wcodemat(D2,nbcol);title('對角高頻D2')subplot(4,3,3);image(wcodemat(A2,nbcol);title('低頻A3')subplot(4,3,6);image(wcodemat(H2,nbcol);title('水平高頻H3')subplot(4,3,9);image(wcodemat(V2,nbcol);title('垂直高頻V3')subplot(4,3,12);image(wcodemat(D2,nbcol);title('對角高頻D3')%重構(gòu)原始圖像X0=waverec2(C,S, 'bior3.7');%顯示重構(gòu)