Re: extract data from graph ?

[Dr.-Ing. Dieter Jurzitza]

Hello CdeMills,

on top of all the suggestions you might consider "PlotDigitzer". It is java based and runs on every operating system; it is specifically suited for x-y data and allows you to enter both a x and a y - scaling before determining the values from the bitmap graphs.

You get scaled values as x-y ascii data - I like it much and have used it very often until now.

Hope this helps,

regards

 

Dieter

Am Mittwoch, 28. März 2018, 15:51:12 CEST schrieb Przemek Klosowski:

> On 03/28/2018 09:07 AM, CdeMills wrote:

> > 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.

>

> There's Engauge http://markummitchell.github.io/engauge-digitizer/

> as well as some excellent web based ones (Tatsuro's email)

 

 

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Dr.-Ing. Dieter Jurzitza 76131 Karlsruhe