s102.m

来自「简单的数字图像处理程序」· M 代码 · 共 30 行

% 灰度图像空域函数变换伪彩色显示  s102
clear;
I103=imread('2.jpg');
Gray=rgb2gray(I103);
F=im2double(Gray);
[m,n]=size(F);
for i=1:m
    for j=1:n
        if F(i,j)<0.25
            a(i,j,1)=1;
            a(i,j,2)=F(i,j)*4;
            a(i,j,3)=0;
        elseif F(i,j)<0.5
            a(i,j,1)=(0.5-F(i,j)*4;
            a(i,j,2)=1;
            a(i,j,3)=0;
           elseif F(i,j)<0.75
            a(i,j,1)=0;
            a(i,j,2)=1;
            a(i,j,3)=(F(i,j-0.5)*4;   
           else   
            a(i,j,1)=0;
            a(i,j,2)=(1-F(i,j)*4;
            a(i,j,3)=1;
        end
    end
end
a1=im2uint8(a);
imshow(a1)