直方图MATLAB yanguo

[qq_39215987]

clc clear rgb=imread('lena.bmp'); gray1=rgb2gray(rgb); % 色彩转换成灰度 a=0.5; b=150; % 可根据实际需要进行改变 gray2=a*gray1+b; figure(1) subplot(1,2,1),imshow(gray1,[]),title('原图'); subplot(1,2,2),imshow(gray2,[]),title('线性变换'); figure(2) imhist(gray1); title('灰度直方图的图像') figure(3) imhist(gray1,15); title('15个小区间的灰度直方图的图像') [counts,x]=imhist(gray1,15) %%获取直方图信息 [J,T]=histeq(gray1,15) %%直方图均衡化 figure(4) imshow(J) title('直方图均衡化');