One of the latest ways of making curves from 
lines.https://hackaday.com/2020/11/03/this-gcode-post-processor-squeezes-lines-into-arcs/


    On Thursday, November 12, 2020, 03:16:43 AM MST, bruno schwander 
<[email protected]> wrote:  
 
 Not true. Vectorizers do that, convert from non vector formats (bitmaps) or
simple vector (just lines)  into vector format including curves and lines.
Look into the algos used in Autotrace (OSS) for example.

Bruno

Date: Wed, 11 Nov 2020 18:20:48 -0800
> From: Chris Albertson <[email protected]>
>
> The information is gone.  There is no way to automatically reconstruct a
> curve from a sequence of straight lines.  A human can do this because he
> can see what was intended.  
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