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

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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.

Answers (2)

DGM on 8 Nov 2021
This is a routine question, it seems. This is the answer as I see it.
The extra-tiny JPG is a nice point of emphasis.

yanqi liu
yanqi liu on 9 Nov 2021
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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