MATLAB: How to superpose several pcolor plots on same image

Image Processing Toolboxsuperpose pcolor

Hi, I'm trying to superpose several pcolor plots but cannot find the right way. Hold on doesn't seem to work.

Also I would like each pcolor plot to have only one colour for all points instead of using a colormap, is that possible?

Thanks for your help !

Max

Best Answer

Maybe you're having a problem because pcolor doesn't have the same number of "pixels" as what you passed in. See this code:

pcolor(rand(3,5)); % Show 3 by 5 grid of pixels - NOT!

Try these links to see how to overlay an image on another image.

Steve's Image Processing Blog

Another link

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MATLAB: Can I plot a dot at a specified pixel location

if ndims(yourImage == 1)
    % Grayscale image.
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else
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end

MATLAB: Nothing show up when plotting with pcolor in 2D

The syntax is fine, so it should work. Possibly OpenGL issues? Try:

figure;
pcolor(X,Y,Z);
set(gcf, 'renderer', 'zbuffer');

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MATLAB: Can I plot a dot at a specified pixel location

MATLAB: Nothing show up when plotting with pcolor in 2D

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