How to Place an image over existing plots?

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Ashley
Ashley 2014-12-18
回答： DGM 2023-3-22
Hello, I have some graphs in Matlab over which I want to insert a small image. I do not want to cover the graphs completely, and want to know how to specify the exact position for overlaying this image onto the existing plots. I have used imread to read the file, but cannot seem to figure out imshow to display the image properly where I would like it to be.

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Chad Greene
Chad Greene 2014-12-18
Hi Ashley,
Run this:
figure
plot((1:10).^2)
axes('pos',[.1 .6 .5 .3])
imshow('coins.png')
The axes command sets up a new set of axes on top of the x^2 plot, with the position of those axes as follows:
[bottomleftcornerXposition bottomleftcornerYposition width height]
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JACQUES SPILLMANN
JACQUES SPILLMANN 2020-4-25
How would I go about rotating that picture on the plot, let's say, by 10 degrees clockwise?
Dardag
Dardag 2020-7-29
I am inserting a particular image in my figure but the resolution of the inserted image gets distorted if I create a smaller box for that, why would that be?
This is what I am using but I don't see any resolution options.
[img, map, alphachannel] = imread(fileName,'png');
image(img, 'AlphaData', alphachannel);

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DGM
DGM 2023-3-22
This doesn't necessarily require creating another axes object. This can be done directly by setting xdata/ydata for image/imagesc/imshow.
See the example:
https://www.mathworks.com/matlabcentral/answers/305543-how-to-insert-image-in-matlab#answer_1175570

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