clc,clear all,close all;

load woman;

[cA,cH,cV,cD]=swt2(X,2,'haar');%用haar小波基进行2尺度平稳小波分解

Y=iswt2(cA,cH,cV,cD,'haar');

figure;

subplot(1,2,1),imshow(uint8(X)),title('原图');

subplot(1,2,2),imshow(uint8(Y)),title('重构');