Ransac: Quantifying error

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Pimax18
Posts: 2
Joined: Mon Jun 17, 2019 1:50 pm

Ransac: Quantifying error

Post 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
daniel
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Re: Ransac: Quantifying error

Post 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.
Daniel, CloudCompare admin
Pimax18
Posts: 2
Joined: Mon Jun 17, 2019 1:50 pm

Re: Ransac: Quantifying error

Post by Pimax18 »

This what I was looking for, thank you !

Pierre
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