Loss of scale - Export of Matic .LAS to Cloud Compare

PIX4Dmatic
1

I use Pix4d for vehicle crash reconstruction. I started with Mapper and now use Matic due to its LiDAR integration when processing projects from the ViDOC.

Post processing, I import Pix deliverables in to Virtual Crash. Since Vcrash does not import .LAS/.LAZ I’m trying to import the .LAS file from Matic in to Cloud Compare and the export a .xyz file from Cloud Compare to import to Vcrash. This process works but not without a major issue.

When I measure in Matic after processing is complete, the project is to scale. GCP targets measured on scene and in Matic match and the length/width of the vehicle is accurate.

When I import to Cloud Compare the same measured points are a lot smaller. Ie/; vehicle length is 4 ft vs 15 ft. and same when imported the exported .xyz from Cloud Compare to Vcrash

Does anyone know how I can retain the scale from Matic to Cloud Compare?

2

I’m not sure how to retain the scale from Matic to CloudCompare, but I will look into adding the .xyz export directly in PIX4Dmatic, so that you do not have to do this workaround anymore.

3

That would be amazing and really useful for anyone using Matic and Virtual Crash from vehicle crash reconstruction.

Looking forward to it

4

@Jason_Zier the .xyz export was added in PIX4Dmatic version 1.50: Download PIX4Dmatic photogrammetry software
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