How can I change a pixel image from black and white to red & blue
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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)
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/806264/image.png)
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);
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回答(1 个)
Robert U
2021-11-19
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 个评论
yanqi liu
2021-12-1
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;
另请参阅
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