matlab小波变换clear all
clc
tic
load a;
for i=1:8
[cA1,cH1,cV1,cD1]=dwt2(a{i},'db1'); %第一次分解
dec1d=[cA1,cH1;cV1,cD1];
[cA2,cH2,cV2,cD2]=dwt2(cA1,'db1'); %第二次分解
dec2d=[cA2,cH2;cV2,cD2];
data_save(1,i)={cA2};
data_save(2,i)={cH2};
data_save(3,i)={cV2};
data_save(4,i)={cD2};
data_save(5,i)={cA1};
data_save(6,i)={cH1};
data_save(7,i)={cV1};
data_save(8,i)={cD1};
end
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