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Questions tagged [point-clouds]

A point cloud is a set of vertices in three-dimensional space, and is commonly the data set output by 3D scanners.

Point clouds are applicable to a variety of 3D imaging scenarios, including terrain mapping, CAD modeling, animation and metrology. A point cloud is a raw data set that typically needs to be converted into a useful data set, a process known as surface reconstruction. There are a variety of known algorithms that make this conversion.

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Metric to compare two point clouds similarity

What are some metrics or methods that are used widely to compare similarity of two point clouds objects ? ( Ex. It could be PCD file or PLY file). I have searched in PCL library's document but not found. Googled it, found some research but they talk…
Chayanin
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Meshlab nan coords and degenerated faces

In my point cloud I can't execute "normal" commands and "filters" because they do not have triangulation faces, so a message appears "Meshlab nan coords and degenerate faces". How do I solve this problem? Can I generate faces in my cloud when I have…
Alexandre Lc
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Alternative to PCL on Python for Processing and Visualization

I am using rospy to receive pointclouds. For processing these pointclouds, there is a package called python-pcl, I was unable to get it running, since it was extremely buggy and non-functional, tons of issues on Github, etc. I wish to know if there…
Schütze
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Pointcloud and RGB Image alignment on RealSense ROS

I am working on a dog detection system using deep learning (Tensorflow object detection) and Real Sense D425 camera. I am using the Intel(R) RealSense(TM) ROS Wrapper in order to get images from the camera. I am executing "roslaunch rs_rgbd.launch"…
Aitul
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How to update a scatter3 plot (in a loop) in Matlab

Quite a simple question but just couldn't find the answer online... I want to visualise a point cloud gathered from a lidar. I can plot the individual frames but wanted to loop them to create a "animation". I know how to do it for normal plots with…
Jack Hayton
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Fast search algorithm for point cloud data

I am working on Zed-mini camera with Nvidia Jetson TX2. I want to get the indices(row/column) of a set of points (with known X,Y,Z tuple values) from the point cloud. Is there any fast search algorithm instead of checking each of the points in the…
Leo
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Create ARReferenceObject manually from a point cloud

My idea is to take a point cloud (e.g. a xyz file) and create a ARReferenceObject out of it and use that to do object detection. So instead of scanning the object first and use the created object reference I want use my own point cloud to do object…
Kristof
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Fast method to remove redundant points in Matlab

I merge two pointCloud objects in Matlab, let's say pc1 and pc2. pc1 is the reference cloud, i.e. all points from pc2 which are equal or very close to points from pc1 need to be removed before the clouds are combined. Clarifications: I know the…
Brokie
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ARCore how to set point cloud in Unity

Sorry i am new at ARCore and augmented reality. I have a general question about PointCloud class in Unity. My question is: Would it be possible to import a point cloud of a room which is scanned by kinect or etc, to Unity to use as PointCloud in an…
Ali Kanat
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Downsampling point clouds to specific number of points while retaining shape

Environment: Python-PCL, WIndows 10, Python 3.6 I need to downsample point clouds to a specific number of points. These point clouds vary in size and hence I am stuck. From going through documentation, I understand there are only VoxelGrid,…
kav
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GICP usage in PCL

I have looked for how to implement Generalized ICP(GICP) with PCL. I found a sample code in test/registration/test_registration.cpp in PCL repository on github. The sample code uses GICP as following. Could you tell me following procedure is correct…
graziegrazie
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The training labels in kitti dataset

I want to know what are the 14 values for each object in the kitti training labels. When I label the objects in matlab, i get 4 values for each object viz (x,y,width,height). What's the difference between the two?
pmdav
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How to set the point of view in pcshow Matlab?

I was wondering if there is any way to set the point of view when visualizing point cloud in Matlab. To show a point cloud I know you can do and use the mouse to move the 3D object: pc = pointCloud(rand(100,3,'single')); pcshow(pc); But how do you…
Tuco
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Plot sphere containing a 3d point cloud in Matlab

I have a three-dimensional point cloud saved in a PLY file. Taking a point (x, y, z) as the center of the sphere, I want to plot the whole point cloud, but with a sphere of radius R which contains several points of the point cloud, but not all the…
Javier de la Rica
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How to display RGB point cloud using opencv?

I am trying to implement region growing algorithm for segmentation using the code given in PCL(1.8.1) tutorial, but I am using Opencv(3.3.0) for displaying. however when I try to simply use a widget and mat to display I don't get any of the colors.…
Giant Cloud
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