How to generate image matrix Red Green Blue Yellow Green

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Generate the following image by defining image matrix:
Red Green Blue Yellow Green.
B(1:100,1:100,1:100,1:00,1:3)=0;
imshow (B)
B(1:50,1:50,1) =1;
B(51:100,51:100,2)=1;
imshow(B)
I am trying to get a 3x3 with the specified colors; Red Green Blue Yellow Green. It's not working, it gives error.

Answers (2)

Image Analyst
Image Analyst on 19 Nov 2012
Is this what you're looking for:
redChannel = zeros(100, 100, 'uint8');
greenChannel = zeros(100, 100, 'uint8');
blueChannel = zeros(100, 100, 'uint8');
redChannel(1:50,:) = 255;
greenChannel(:, 1:50) = 255;
blueChannel(51:100, 51:100) = 255;
coloredImage = cat(3, redChannel, greenChannel, blueChannel);
imshow(coloredImage)
  6 Comments
Cesar
Cesar on 2 Feb 2013
Edited: Walter Roberson on 2 Feb 2013
Can you please complete it to create the 3 X 3 image:
Red Yellow
Green
Green Blue
Image Analyst
Image Analyst on 2 Feb 2013
Cesar, you can see my solution and the modifications to it to do what you want should be straightforward. Just change the row and column ranges.

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Walter Roberson
Walter Roberson on 19 Nov 2012
B(1:100,1:100,1:100,1:00,1:3)=0 tries to define a 5 dimensional array in which the fourth dimension is empty. 1:00 is empty. Perhaps you meant 1:100 .
RGB matrices are 3 dimensional.
You may wish to use zeros() to initialize the matrix.

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