.华东师大学电子工程系2021.6实验1：图像灰度级修正【实验目的】掌握常用的图像灰度级修正方法灰度变换法和直方图均衡化，加深对直方图的理解。观察图像的增强效果，对灰度级修正前后的图像加以比较。【实验容】1编程实现图像的灰度变换，改变图像的输入、输出映射参数围线性拉伸和反比；2修改参数gamma值大于、小于、等于1，观察处理结果；3对图像直方图作均衡化处理，显示均衡前后的图像及其直方图。【实验代码】original=imread(lena.bmp);linstr=imadjust(original,0.3 0.7,0 1);%线性拉伸opposite=imadjust(original,0 1,1 0); %反比above=imadjust(original,0 1,0 1,2); %gamma1equal=imadjust(original,0 1,0 1,1); %gamma=1below=imadjust(original,0 1,0 1,0.5); %gamma1);subplot(3,3,5);imshow(equal);title(gamma=1);subplot(3,3,6);imshow(below);title(gamma1时图像整体变暗，灰度级整体变小；gammawinbuf(k+1) temp=winbuf(k); winbuf(k)=winbuf(k+1); winbuf(k+1)=temp;