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extract data from graph ?

From: CdeMills
Subject: extract data from graph ?
Date: Wed, 28 Mar 2018 06:07:27 -0700 (MST)


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.



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