clc,clear all,close all;load woman;%单尺度二维离散小波分解。分解小波函数haar[cA,cH,cV,cD]=dwt2(X,‘haar‘);%单尺度二维离散小波重构(逆变换)Y=idwt2(cA,cH,cV,cD,‘haar‘);figure;subplot(1,2,1),imshow(X,map),title(‘原始图像‘);subplot(1,2,2),imshow(Y,map),title(‘重构图像‘);