Extract X, Y and Z data from contour plot in JPEG format.

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FNU Dhanraj
FNU Dhanraj 2021-11-8
回答： yanqi liu 2021-11-9
Hello,
I am trying to extract X, Y, Z data from an engine BSFC contour plot. Is there any function or tool that can help me in extracting the data? I have attached an example of BSFC contour plot which I am trying to extract the data from.
Thanks
Dhanraj

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回答（2 个）

DGM
DGM 2021-11-8
This is a routine question, it seems. This is the answer as I see it.
https://www.mathworks.com/matlabcentral/answers/1460034-how-can-i-extract-the-data-from-this-jpeg-file-any-suggestion
The extra-tiny JPG is a nice point of emphasis.
yanqi liu
yanqi liu 2021-11-9
sir，use image file to extract data，or use figure plot？
if use figure，i thinke may be use graphic handle to extract xdata and ydata

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