Problems with the import of laser scan data

Development Asset Creation
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1

Hello there,

I am failing with the import of laserscan data. The pointclouds are created with a GeoSLAM handheld scanner and exported as .las and .E57 via their software suite.

Upon import of such a .E57 file, RC immediately crashes everytime.

I have tried loading the pointclouds into CloudCompare and exported them as .E57 again:

That way the import process seems to work, but the pointclouds are only visible as weird images in the 2D view:

They are loaded as “Point clouds rig 1”, containing 6 parts for some reason.

Here are the tie-points from the photogrammetry alignment in 3D View. I can’t find the laser-point-clouds anywhere:

Am I doing something wrong here? What do I have to do in order to get those laserscan-pointclouds into my photogrammetry set?

Best regards,

Bodo

2

The console says, that the pointcloud is imported as 6 images. Why is that?

3

Hi Bodo,

did you ask a similar question as “Abanob” or is that a coinsidence?  :slight_smile:

Anyway, as far as I know RC only supports scans that have individual stations. The reason is that RC creates little cubes where all the points are converted to 6 images. If you use a complete scan with no such stations, I guess it gets confused. Also, your points need color information so that the images can be aligned to them.

4

Hello Götz,

thanks for the info -what a shame, I was hoping that this was possible. Now I think I will have to align the pointclouds from RCs photogrammetry with the gray laserscan-cloud in some external software like CloudCompare or Meshlab and see how this will go. I do have a few GCPs for manual alignment, too. The plan would then be to re-import the combined pointcloud into RC for mesh creation etc.

Cheers

5

Hey Bodo,

no problem.

I’d be interested how that will work out. I am also toying with the idea of getting a handheld scanner…

How do you plan to merge the clouds? Is it possible to do that with CC or ML? Aligning yes, but to transform one to match the other?

6

hello Bodo, 

this is the guy who had the same issue as u do, i would like to let u know that i resolved my issue of alignment of handheld scans with images my problem was insufficient data, however once i got the right amount of data it’s aligned the images and the scans .

i think the problem with u is because the point clouds u imported into RC are not coloured with is a problem since RC Transform scan file into images to use them in the undergoing triangulation process( as far as i understand, might be wrong) that’s why u see .LSP files , try to colourise your scans it might fix the issue for you 

7

hi Bodo, have you managed to resolve the issue?