CloudCompare forum

There are targets placed in both scans that are stationary and are always in the same location. I use these to estimate the error. Most errors are around .004m. I believe the GPS is rather accurate on the scanner we use. It is fairly new. Like I mentioned before, I have other scans that are missing ...

Daniel, I use pts files. The issue I am running into is that all of my other comparisons maintain proper heights throughout the entire process listed below. I use the same method for each comparison. Do you think that this issue with the incorrect heights, or perhaps missing GPS information from the...

I use a program called SCENE that is associated with the terrestrial LIDAR scanner. I have about 80 comparisons dealing with bank erosion and deposition. Once I have processed the images in SCENE I then use CloudCompare to run the M3C2 algorithm that is needed to see changes. After running the algor...

Hello, I am trying to upload some ATLS scans and the first line that appears is highlighted in pink and has strange symbols for column attributes. If I click "apply" an error message occurs reading, "at lease 2 vertex coordinates must be defined." About a week ago, these images w...

Daniel,

I have sent you a link to some of my scans. I tried to run the M3C2 again last night and it would not work. Let me know what you think of the parameters I attached.

Thank you.
Carly

Daniel,

The files I am working with are very large. A billion points some of them. And our scans are in meters. Is this why the M3C2 is not working?

Daniel,

What would you recommend this number to be? And what does registration error mean in cc?

Thank you.

Daniel,

When you say 'units of the cloud' could you be specific? Are the parameters I have set (listed in the previous post) reasonable for running comparisons? Would you suggest changing any? Our goal is to detect small changes in erosion/deposition along bank shores.

Thank you.

What is the registration error box under the M3C2 parameters actually doing? And what happens to the output if you change the numbers? I have been changing it from .01 to .05 depending on my error from another program. Should I being leaving it set at 1.0?

Thank you,
Carly

The M3C2 algorithm will not run. I am comparing two river banks. I set the parameters to: diameter: 1.0, projection: .2, max depth: .5 and then use the multi scale tab under the normals tab, Min: .4, Step: .4, Max: 1.6. I set the registration error to usually between .01-.05. depending on what my er...