Matlab底层算法实现图像亮度的增减

公式

Matlab底层源码

%%%%%%%%%%%%%%%%%%%%%%%%图像的亮度增减
clc;
image = imread('C:\Users\MI\Desktop\1.png');
image_matrix=image(:,:,1);
BrightNumber=100;   %增加的亮度
[height,width,channels]=size(image);
GrayImage_matrix=zeros(height,width);
for i=1:heightfor j=1:widthif(int16(image_matrix(i,j))+BrightNumber>255)GrayImage_matrix(i,j)=255;elseif(int16(image_matrix(i,j))+BrightNumber<0)GrayImage_matrix(i,j)=0;elseGrayImage_matrix(i,j)=int16(image_matrix(i,j))+BrightNumber;endend
end
iamge_out = uint8(GrayImage_matrix);
%显示
subplot(1,2,1);
imshow(image);
subplot(1,2,2);
imshow(iamge_out);

效果图