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Re: extract data from graph ?

From: Tatsuro MATSUOKA
Subject: Re: extract data from graph ?
Date: Wed, 28 Mar 2018 22:18:24 +0900 (JST)

--- Pascal.Dupuis
> Hello,
> I need to correct a paper containing graphs saved as bitmap images. Those
> images were generated by a scope, and I can't redo the experiment. Is there
> some way to "undo" the graph and get back the curves ?
> I can take the image, apply a differentiator, check for regions of high
> contrast, and map that region back to values. But if some automatic tool
> could do it quickly and without error, it would be better.
> Regards
> Pascal

l found the below:


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