clc,clear all,close all;I=imread(‘C:\Users\Jv\Desktop\wenli2.jpg‘);gray=rgb2gray(I);X=double(gray);% 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)，升低频降高频Y=idwt2(1.2*cA,0.6*cH,0.6*cV,0.6*cD,‘haar‘);figure;subplot(1,2,1),imshow(uint8(X)),title(‘原始图像‘);subplot(1,2,2),imshow(uint8(Y)),title(‘增强图像‘);