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Questions tagged [lidar]

LIDAR (Light Detection And Ranging) is an optical remote sensing technology that measures properties of scattered light to find range and/or other information of a distant target.

If the question is not solely about programming it might be suitable on gis.stackexchange.com

Programming questions related to lidar geospatial data are also welcome on GIS SE.

429 questions
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Can we develop LiDAR apps using ARKit with SceneKit?

I have read on many forums that if we want to develop a LiDAR application, we need to use RealityKit, instead of SceneKit. I am in the middle of development of Apple LiDAR Tutorial. But instead of using RealityKit, I used SceneKit. But now I got a…
Randi
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Convert XYZ point cloud to grayscale image

Everyone I'm trying to convert point cloud (X, Y, Z) to the grayscale image using python. I learned that the grayscale image could be generated by a Numpy array. But what I have now is a set of points which contains X, Y and height. I wanna generate…
Yun Zhao
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How to convert las file to ply file?

I want to open my 3D point cloud in MATLAB. But they are in .las files. How can I display them in MATLAB??? I heard about .ply file can open 3D point data on MATLAB. So I want to know how to convert las files to ply files.
Gethmini Senevirathna
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Can see topic in rostopic list but cannot echo

I am working on a tele-operation mode of a mobile robot, from a control station(my laptop). Both the control station and the mobile robot is using Ubuntu 14.04, ROS Indigo. The control station and the robot is connected to the same WIFI network and…
Azhar.92
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How to import liblas module in Python?

I am using liblas for python to read .las file. When I enter: from liblas import file It gives me: No module named liblas. I already set up las library path in system, lasinfo is working fine. Can anyone tell me how to import las library in…
Saddy
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mesh package in R

I am looking for an R package which could provide a framework to interact with Airborne-Laster-Scanning (ALS)-data and polygon-meshes. I guess it is pretty straightforward to use RCPP for…
michelk
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How to read many lidar files (.las) at once and combine them into one dataframe in R

I have folder where many lidar(.las) files. It looks like library(rgdal) library(raster) library(tmaptools) library(tmap) library(lidR) library(RStoolbox) las=readLAS("C:/1/078-638.las") las1=readLAS("C:/1/082-628.las") las2=.... so if more than…
psysky
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ARKit cannot visualize ARObjects at distance, which is 10 meters away

I place a virtual model on the wall 10m away with RealityKit. I can not see the virtual model, though I can see the wall clearly. And when I enable debugoption.showSceneUnderstanding in RealityKit, the virtual model shows up. Or when I come closer…
Bob
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ARKit + SceneKit: Using reconstructed scene for physics?

I'm using ARKit with SceneKit and would like to let my 3D objects physically interact with the reconstructed scene created by devices with LiDAR sensors (config.sceneReconstruction = .mesh). For example, having a virtual ball bounce off of the…
Matt Bierner
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How to get a vertex position in ARKit's reconstructed mesh?

Recently, I make it about lidar scan project. It is very difficult. And I need to manipulate vertex data. So I tried by this code guard let meshAnchors = arView.session.currentFrame?.anchors.compactMap { $0 as? ARMeshAnchor } else { return…
You.Brighton
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How to export a 3D coloured model file from LiDAR Meshes from sceneUnderstanding iOS14?

I was trying to export the mesh file visible by sceneUnderstanding and thanks to stackoverflow i was succeed. But the output is white and it is not that much clear and understand easily. So i started my try for coloured file export for the sample…
AnilG
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Real time point cloud processing and latency

Our project is to integrate Lidar system into virtual reality (unity). I could achieve that integration with ROS-bridge. Next step is to process the point cloud data before we send it to unity system. Lidar sensor velodyne VLP-16 Ubuntu 18.4 IDE:…
Seong Su Byeon
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ARKit 3.5 body tracking by LIDAR

As you definitely know iPad Pro has LIDAR to track 3D space around and it is capable to measure space around. Does anyone have any experience or tip how to measure body parts using ARKit 3(using iPhone X ...) / 3.5 with LIDAR? I checked…
Milan Rada
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How can I detect the corner from 2D point cloud or Lidar scanned data?

I want to measure the room surface area( in meter square) and want to find out the floor plan using 2D-Lidar. How can I achieve this? In the picture, you can see lots of dots. Each dots represent angle and distance with respect to the Lidar…
Kazi
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How to avoid using nested loops in cpp?

I am working on digital sampling for sensor. I have following code to compute the highest amplitude and the corresponding time. struct LidarPoints{ float timeStamp; float Power; } std::vector measurement; // To store Lidar points…
Skanda
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