Search found 7 matches

by boocaj
Mon Oct 24, 2022 12:08 pm
Forum: Questions
Topic: Color scale editor acting different in negative and positive
Replies: 2
Views: 638

Re: Color scale editor acting different in negative and positive

Hi, I found why it was doing this. I extended the color scale editor window too big so it kind of shrinked the scale. If I down size it a bit, it is all good.
Thanks!
by boocaj
Mon Oct 24, 2022 12:07 pm
Forum: Questions
Topic: M3C2 limit of detection
Replies: 1
Views: 683

M3C2 limit of detection

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, dist...
by boocaj
Wed Oct 19, 2022 7:42 pm
Forum: Questions
Topic: Color scale editor acting different in negative and positive
Replies: 2
Views: 638

Color scale editor acting different in negative and positive

It may seems like a stupid question, but I've been working on this for more than an hour now and I can't figure out how to solve it. I want to create a color scale that colors the points in white between -0.05(m) to 0.05 and than gradually evolve from blue to purple between -0.05 to -5 and from yell...
by boocaj
Wed Oct 19, 2022 12:17 pm
Forum: Questions
Topic: How to delete single points that can't be isolated with segmentation tool
Replies: 1
Views: 606

How to delete single points that can't be isolated with segmentation tool

I have to clean a rockwall dense cloud to remove the vegetation and the noise. I already did the big job with the segmentation (scisor) and the SOR tools, but there a few random points off the wall that I am not able to isolate (find an angle of view with no other points at the back) to be able to s...
by boocaj
Wed Sep 21, 2022 1:39 am
Forum: Questions
Topic: Compute normals parameters
Replies: 3
Views: 880

Re: Compute normals parameters

Thanks for the quick reply! I also tested the K nearest neighbours instead of specifying a prefered orientation and it seems to give good results for the entire study site (no matter if it is facing north or west). I however don't really find some detailed documentation on how to chose the good radi...
by boocaj
Tue Sep 20, 2022 3:23 pm
Forum: Questions
Topic: Compute normals parameters
Replies: 3
Views: 880

Compute normals parameters

I want to use the M3C2 pluggin to do some change analysis between two rockwalls in time. Instead of using the Normals parameters directly in the pluggin, I want to compute them before and then "Use cloud #1 normals" in M3C2. This should allow me to compute better normal considering there a...
by boocaj
Wed Aug 24, 2022 6:10 pm
Forum: Questions
Topic: Distinguish rockwall from vegetation
Replies: 1
Views: 681

Distinguish rockwall from vegetation

Hello, I have two Lidar dataset of the same Rockwall (one of 2018 and another of 2022). I need to filter the point clouds in order to keep only the rockwalls (remove vegetation) to compare them and analyse if there has been rockfalls in the las years. I however only have access to a pre-processed da...