How can I change a pixel image from black and white to red & blue
4 views (last 30 days)
Show older comments
How can I change a pixel image from black and white to red & blue? The image present a letter 'H' with black and white but I want to change the colour into red & blue. ( testmap is my martix name)
0.2143 0.3395 0.4173 0.3642 0.4025 0.5045
0.4403 1.0000 0.2445 0.2729 1.0000 0.4498
0.4804 1.0000 0.2292 0.2102 1.0000 0.4223
0.3724 1.0000 1.0000 1.0000 1.0000 0.3090
0.4783 1.0000 0.5504 0.3024 0.5916 0.3535
0.5192 1.0000 0.2271 0.3599 1.0000 0.4186
0.3193 0.2616 0.4490 0.2360 0.3270 0.5178
imshow(testmap(:,:,1), 'InitialMagnification' ,2000);
0 Comments
Answers (1)
Robert U
on 19 Nov 2021
Hi Yik lok Chan,
corn_gray = imread('corn.tif',3);
imshow(corn_gray)
map = [linspace(1,0,256)', zeros(256,1), linspace(0,1,256)'];
figure;
imshow(corn_gray,'Colormap',map)
Kind regards,
Robert
1 Comment
yanqi liu
on 1 Dec 2021
clc; clear all; close all;
testmap=[0.2143 0.3395 0.4173 0.3642 0.4025 0.5045
0.4403 1.0000 0.2445 0.2729 1.0000 0.4498
0.4804 1.0000 0.2292 0.2102 1.0000 0.4223
0.3724 1.0000 1.0000 1.0000 1.0000 0.3090
0.4783 1.0000 0.5504 0.3024 0.5916 0.3535
0.5192 1.0000 0.2271 0.3599 1.0000 0.4186
0.3193 0.2616 0.4490 0.2360 0.3270 0.5178];
imagesc(testmap(:,:,1));
% red & blue
map=[linspace(1,0,256)', zeros(256,1), linspace(0,1,256)'];
colormap(map); axis equal; axis off;
See Also
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!