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Creating a color image

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PenguinForce
PenguinForce 2016-10-1
评论： PenguinForce 2016-10-2
I am trying to create a 256X256 image that starts out blue on the left hand side and scales down by one index every column so that it is black on the right side, kinda like in this picture but opposite direction but I cannot get this code to preform. How can I achieve this? Is there also a way to do this vertically as well, ie, blue on top scaling down to black on the bottom?
image(:,:,1)= zeros(256,256,1);
image(:,:,2)= zeros(256,256);
for i=1:256
image(i,:,3)= [255:-1:0];
end
image=image/255;
imagesc(image)

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Walter Roberson
Walter Roberson 2016-10-2
Blue_image = zeros(256, 256, 3, 'uint8');
Blue_image(:, :, 3) = repmat(255:-1:0, 256, 1);
Please avoid using image as a variable name, as it is the name of an important MATLAB routine to display images.
  1 个评论
PenguinForce
PenguinForce 2016-10-2
Thank you! I did not know that about the image variable name but thank you for letting me know! I appreciate your time

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