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Ransac: Quantifying error

Posted: Mon Jun 17, 2019 1:59 pm
by Pimax18
Hello,

I was wondering if there is a simple way to determine the error Ransac is doing when fitting planes ?

An indice for each plane generated, based on the position of the points (distances from the plane) used for example

Thank you,

Pierre

Re: Ransac: Quantifying error

Posted: Mon Jun 17, 2019 5:33 pm
by daniel
The RansacSD plugin generates the subsets of points corresponding to each plane fitted, as well as the planes themselves (as 'plane' entities, below the cloud).

Just highlight the two entities (cloud and plane) and compute the distances (with the 'Cloud to Mesh distances' tool). You'll get in the console the corresponding RMS I believe (or you can fit a Normal distribution and read the standard deviation for instance).

It would be possible to automate this process relatively easily if you have some programming skills.

Re: Ransac: Quantifying error

Posted: Fri Jun 21, 2019 9:27 am
by Pimax18
This what I was looking for, thank you !

Pierre