How do I digitize an external image file using ginput command?

Hi all

I have a force displacement graph in pdf image and need to have the true stress strain curve.

Many digitizer apps work not so great.

Is there a way to write a code to do this digitizing in MATLAB?

[Stephen23]

https://www.mathworks.com/matlabcentral/fileexchange/7173-grabit

https://www.mathworks.com/matlabcentral/fileexchange/41313-graph-picker

https://www.mathworks.com/matlabcentral/fileexchange/4316-reverseplot

etc.