How to read the data of diagram image

Hi All

I have a diagram , that has the scales , I can read it but to use the data, I was searching for a better method , for example if I scan it, since it is in PDF format, how can I read all the points of the Diagram and export it to Excel ?

Please tell me all the steps

Thank you very much

Best Regards

[farzad]

Has anybody the same Exp ??

Answer 1

[Walter Roberson]

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

http://www.mathworks.com/matlabcentral/fileexchange/30418-graphscannergui