Newbie Menu greyed out question

[ARad]

I am attempting to apply smoothing - either a Gaussian Filter or a LaPlacian smooth - to a point cloud.

But the menus to do so are greyed out.

Have tried:
- Saving as .bin and opening that .bin file.
- Making sure I've selected the point cloud in the DB tree to which I want to apply the operation.
- find a way to select a given subset of points - segment didn't seem to do.
-

Is it something simple I'm not doing?
Do I need a "Plugin?"

Thanks,
Andy

[daniel]

These methods are to be applied on scalar fields. So your cloud needs an active scalar field.

[ARad]

Ah, I see.

So this is not something that would smooth a physically rough or noisy scan of a geometry, but rather the secondary values associated with the points?

Is there a tool or method that could be applied to take a raw, noisy scan as input, and perform a geometrical gaussian operation with a new set of point cloud locations as an output?

Thanks,
A

[daniel]

Indeed, these tools smooth any scalar information held by points (intensity, temperature, etc.) taking the points position into account.

For your matter, there are two tools that may interested you:
- the 'Clean > Noise' filter that will try to remove the outilers
- the 'MLS' filter (from the PCL library) that is accessible from the qPCL plugin. I believe it actually generates a smoothed version of a cloud.

[ARad]

Thanks very much - that appears to be a good path for my needs and is working in the tool.

Much appreciation for all you've done and for your help today.

A