Contours from "Compute geometric features"

[woody]

Hi,

Firstly, thank you for the great work in providing and updating this awesome software.

I am just playing with the new Compute Geometric Features tool, and was wondering if there is any way to output, or generate polylines based on the results?

IE, I am looking for an edge/contour polyline/spline detection or generating approach.

So, for any corners (say for example the corner of a building's window) an averaged line is drawn.

I hope that makes sense?

Thanks in advance for any replies.

[daniel]

Hum, there's no such tool (yet)!

[woody]

Hum, there's no such tool (yet)!

Hi Daniel, thanks for the reply.

Is this something that could be on the road-map potentially?

What i managed to do quite successfully was use the geometric features tool to split out different vertical and horizontal planes, along with curvature and a few others, using this data split into separate clouds, I would then like to either get a curve that just follows the boundary of each "plane" or, using the curvature option which pretty much defines the edges anyway, use this data to get a line through the average of the remaining cloud points.

I think it could be quite a handy tool if for example you need to scan a room or object and need to make a quick low resolution CAD model of the point-cloud based on corner angles or planes etc.

Hope this might be possible and not too difficult to do!

Thanks again for your dedication to this awesome set of tools!

[daniel]

Well, frankly this is a difficult task!

I clearly understand the need, but I doubt anyone in the team has time/money to undertake such a work. As always, the ideal option would be to find a motivated developer that could actually do this work (PhD student, etc.).

[woody]

Yep, quite understand - easy to have ideas, not always so easy to implement them! Thanks again!

[JWallace]

Hi Daniel,
I have no idea regarding programming, so disregard this if it is ridiculous.
But I just read an article about this.
Could their algorithm be used in CloudCompare?

https://pdfs.semanticscholar.org/c6a2/9 ... cdf4ea.pdf

[daniel]

It's clearly not straightforward, but it's not impossible for someone motivated and with some good algorithm/programming skills (ideally that would have to be implemented in a plugin ;)