灰度图像转彩色图像代码

clc; clear all; close all;

I = imread('q.jpg');

I1 = I; I2 = I; I3 = I;

I1(I1>60 & I1<120) = 255;

I2(I2>20 & I2<50) = 255;

I3(I3>80 & I3<160) = 255;

J = cat(3, I1, I2, I3);

figure;

subplot(1, 2, 1); imshow(I, []); title('By lyqmath 原图', 'FontWeight', 'Bold', 'Color', 'r');

subplot(1, 2, 2); imshow(J, []); title('By lyqmath 彩色图', 'FontWeight', 'Bold', 'Color', 'r');

二.

I = imread('q.jpg');

GS8=grayslice(I,8);

GS64=grayslice(I,64);

subplot(1,3,1), imshow(I), title('原始灰度图像');

subplot(1,3,2), subimage(GS8,hot(8)), title('分成8层伪彩色');

subplot(1,3,3), subimage(GS64,hot(64)), title('分成64层伪彩色');

k=imread('q.jpg');

[x y z]=size(k);

% z should be one for the input image k=double(k);

for i=1:x

for j=1:y

if k(i,j)>=0 & k(i,j)<50

m(i,j,1)=k(i,j,1)+5;

m(i,j,2)=k(i,j)+10;

m(i,j,3)=k(i,j)+10;

end

if k(i,j)>=50 & k(i,j)<100

m(i,j,1)=k(i,j)+35;

m(i,j,2)=k(i,j)+28;

m(i,j,3)=k(i,j)+10;

end

if k(i,j)>=100 & k(i,j)<150

m(i,j,1)=k(i,j)+52;

m(i,j,2)=k(i,j)+30;

m(i,j,3)=k(i,j)+15;

end

if k(i,j)>=150 & k(i,j)<200

m(i,j,1)=k(i,j)+50;

m(i,j,2)=k(i,j)+40;

m(i,j,3)=k(i,j)+25;

end

if k(i,j)>=200 & k(i,j)<=256 m(i,j,1)=k(i,j)+120;

m(i,j,2)=k(i,j)+60;

m(i,j,3)=k(i,j)+45;

end

end

end

figure,imshow(uint8(k),[]);

figure,imshow(uint8(m),[]);