Combination of laser scans and UAV images

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blaho

• July 09, 2018 08:53

 Hello,

I have a problem to combine this two cloudpoints. I have photos and registred pointcloud from scanner. After alignment there are allways two (and more) components and I have to use control points to join it together. But after joinment there are visible differences between cloudpoints in one common cloudpoint (two walls for example). Is it depend on number of control points? 

If I use georeferenced data (pointclouds) will it be better? Or I have to use some other alignment settings? Are there some general settings or it is different for each project?

Thank you for the answer,

 

Ondrej

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  Götz Echtenacher

  • July 09, 2018 16:00

  Hi Ondrej,

  I'm afraid there are no magical settings - the standard is sufficient for most cases.

  Did you import the scans a s ordered clouds?

  It also depends on how the scans relate to the UAV footage. A few screenshots and/or sample images would help.

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  blaho

  • July 27, 2018 13:30

  Yes, they were orderered.

  I solved this problem using tie points. But when I exported the point cloud, it was changed. There were different distances between points, but not on the whole model. In some parts of model were correct distances, in other not.

  Can it be caused, because I used existing orientation of images?

  What is the main pointcloud for combination? Images or scans?

  Thanks

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  Götz Echtenacher

  • July 29, 2018 12:15

  Hi blaho,

  the problems you encounter are not uncommon and have been discussed in the forum.

  Have you read around yet?

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