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M3C2 limit of detection

Posted: Mon Oct 24, 2022 12:07 pm
by boocaj
Hi,

According to what I understand of figure 10 in Lague et. al (2013) (*see ref below), 3 scalar fields should result of the M3C2 pluggin output : level of change detection (LOD) at 95%, significant change and measured change (see attach picture). But in reality, my outputs are: M3C2 distance, distance uncertainty and significant change. So I am wondering if there is any way to add the "Level of change detection at 95%" in my M3C2 outputs (like on the attach figure)? If not, is my "significant change" scalar field based on a local LOD of 95% (like on the attach figure)?

Thank you!

*Lague, D., Brodu, N., et Leroux, J. 2013. Accurate 3D comparison of complex topography with terrestrial laser scanner: Application to the Rangitikei canyon (N-Z). ISPRS Journal of Photogrammetry and Remote Sensing, 82(February 2013): 10‑26.

Re: M3C2 limit of detection

Posted: Wed Oct 26, 2022 9:21 pm
by daniel
Yes, the distance uncertainty is based on LOD95%:
https://github.com/CloudCompare/CloudCo ... s.cpp#L385

And the 'significant change' scalar value is also derived from it.