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Image reading and processing

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How do I generate just the red channel, from the colourful image that I have attached below?

  3 Comments

Jon
Jon on 11 Sep 2019
Sorry I don't see your image. Did you attach it? Also it would be good if you could please provide the actual data that you are plotting not just the image
Usha Silwal
Usha Silwal on 11 Sep 2019
try.jpg
This is the image I am working on and I just need to display the blue channel of the image.
Jon
Jon on 12 Sep 2019
How is the image encoded? Please provide the matrix you are plotting

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Accepted Answer

Sourav Bairagya
Sourav Bairagya on 16 Sep 2019
After reading the image properly, you can separate the channels using this code segment.
a=imread('test.jpg');
a_red=a(:,:,1); %RED channel
a_green=a(:,:,2); %GREEN channel
a_blue=a(:,:,3); %BLUE channel
figure;imshow(a);title('Color Image');
figure;imshow(a_red);title('Red Channel');
figure;imshow(a_green);title('Green Channel');
figure;imshow(a_blue);title('Blue Channel');
Now, you can also save each channel as separate image using ‘imwrite’ function. Hope this will help.

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