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how to display two colours in one graph?

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Seba.V
Seba.V on 26 Apr 2020
Answered: Image Analyst on 26 Apr 2020
Hello everyone,
I first use cat() to define the color from RGB values and then I am trying to plot the colors of two differnet pixel one next to the other using image().
Any suggestions on how I can do that?
this is working for me but i would like to have them showing in the same graph and figure
Thank you in advance
figure
image(truecolor_image)
figure
image(truecolor_image1)
axis equal

  2 Comments

Image Analyst
Image Analyst on 26 Apr 2020
I have no idea what you want to do. cat() does not define colors. And image() does not plot color values - it displays images. So I have no idea what you want as a "graph". Please mock up a picture and post it so we can figure out what you want.
Seba.V
Seba.V on 26 Apr 2020
Sorry I hope the picture makes a bit more sense.
I have the color of two pixels and i want to show them one next to the other instead of in two separate images.

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Accepted Answer

Image Analyst
Image Analyst on 26 Apr 2020
See Steve's blog:
Or else just do this:
imageHeight = 300;
% Create an image of all 1's.
blank = ones(imageHeight, 'uint8');
% Assign (or get) the two RGB values into a vector.
rgb1 = [0, 255, 255];
rgb2 = [255, 146, 0];
% Create two images. One image for each color.
color1 = cat(3, rgb1(1) * blank, rgb1(2) * blank, rgb1(3) * blank);
color2 = cat(3, rgb2(1) * blank, rgb2(2) * blank, rgb2(3) * blank);
% Stitch them together into one image.
twoPixels = [color1, color2];
% Display that image.
imshow(twoPixels);

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