Custom axis scale and colorbar form imagesc

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Raphaël
Raphaël 2018-11-23
回答： Raphaël 2018-11-23
Hi,
I have an image I'm displaying with imagesc. By default, Matlab gives you the x and y axis of the pixel number. So if I have a 500x400 image, the y and x scale will go frim 1 to 500 and 1 to 400.
Instead, I would like that those axis show me the position in mm. My 500x400 image represent a real image of 10mm x 8mm. I would like my axis to show me values ranging from 0 to 10mm and 0 to 8mm. Is it possible in Matlab?
Furthermore, is is possible to have a log scale colorbar? I display the log10(image) values instead of image values and it would be nice to have the colorbar showing the real values.
Thank you for the help.
RMT

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Raphaël
Raphaël 2018-11-23
imagesc(x,y,image)
where
-image is a 2D matrix cointaining the data
-x is a two value vector corresponding to the start and end of the scaling, x = [0 8]
-y is a two value vector corresponding to the start and end of the scaling, y = [0 10]

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