tuxiangzengqiang.rar_图像对比度_平均适应度_直方图均衡化 对比度_自适应 图像增强_锐化

%读出图像 I=imread('rice.tif'); %显示图像 subplot(3,4,1);imshow(I); title('原图'); %显示直方图 subplot(3,4,2);imhist(I,64); title('原图直方图'); %原图像f(m,n)的灰度范围[a,b]线形变换为图像g(m,n),灰度范围[a’,b’] %公式：g(m,n)=a’+(b’-a’)* f(m,n)/(b-a) %increase contrast J=imadjust(I,[0.15 0.9],[0 1]); subplot(3,4,3);imshow(J); title('增加对比度'); %显示直方图 subplot(3,4,4);imhist(J); title('增加对比度直方图'); %decrease contrast J=imadjust(I,[0 1],[0.3 0.8]); subplot(3,4,5);imshow(J); title('减弱对比度'); %显示直方图 subplot(3,4,6);imhist(J); title('减弱对比度直方图'); %直方图均衡 J=histeq(I); subplot(3,4,7);imshow(J); title('直方图均衡'); subplot(3,4,8);imhist(J); title('均衡直方图'); %加入salt & pepper噪声 %J=imnoise(I,'salt & pepper',0.02); %加入gauss噪声 %J=imnoise(I,'gauss',0.02); %加入speckle噪声 J = IMNOISE(I,'speckle',0.02); subplot(3,4,9);imshow(J); title('加入speckle噪声后图像'); %3*3中值滤波 MFJ=medfilt2(J,[3 3]); subplot(3,4,10);imshow(MFJ); title('中值滤波后图像'); %平均过滤 AFJ=filter2(fspecial('average',5),J); subplot(3,4,11);imshow(AFJ/255); title('平均滤波后图像');