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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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Feature Vectors in Radial Basis Function Network

I am trying to use RBFNN for point cloud to surface reconstruction but I couldn't understand what would be my feature vectors in RBFNN. Can any one please help me to understand this one. A goal to get to this: From inputs like this:
jquery404
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Ploting point clouds using Matlab

I am using below code to plot the Kinect point clouds in Matlab: showPointCloud(pcloud, 'VerticalAxis', 'y', 'VerticalAxisDir', 'Down'); xlabel('X (m)'); ylabel('Y (m)'); zlabel('Z (m)'); Which give me this plot : But I wish to plot it up to 1…
CyberMan
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What is the difference between Depth Data and Point Cloud?

I cant figure out the difference between depth data that we get from device like Kinect which contains xyz and depth information and the point cloud data. can someone please explain it to me. thanks in advance.
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Remove Inf and NaN values in a Point Cloud in the fastest way

I am new to MATLAB and just started working on Stereo Vision. After 3D Stereo Reconstruction of a scene, from the point cloud I obtain, I want to ignore all the co-ordinates with values NaN or Inf. To do so, I am following this procedure: For an…
Saania
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warped/curved point clouds

I am working on sparse reconstruction using a calibrated stereo pair. This is the approach I have taken step by step: 1- I Calibrated my stereo cameras using the Stereo Camera Calibrator app in MATLAB. 2- I Took a pair of stereo images and…
CV_passionate
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Checking point coordinates in PCLVisualizer

How can I check specific point coordinates in PCLVisualizer? There are no information regarding this topic in help: | Help: ------- p, P : switch to a point-based representation w, W : switch to a wireframe-based…
Szał Pał
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Eigen::Vector3f alignment

I'm using Eigen to process an unstructured point set (point cloud), represented as an array of Eigen::Vector3f objects. In order to enable SIMD vectorization I've subclassed Vector3f into a class with alignas(16). The objects in the array each start…
tmlen
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Height and width in pclPointCloud

Why do we have height and width in pclPointCloud? The API documentation here says that The point cloud height (if organized as an image-structure). What does "image-structure" mean here? Also, I noticed that it gives exception when the number of…
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How is size used in THREE.PointCloudMaterial?

I am trying to understand how the "size" attribute in the THREE.PointCloudMaterial translates to the size of it's points on the screen. With an orthographic camera set at (-1,1,1-1) and size = 1, the points do not fill half the screen, so…
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convert 3D plane to 2D

I have a set of point cloud forming a plane in 3D, which I've obtained from RANSAC plane fitting. For some specific kind of analysis of the data I need to convert this to a 2D problem so that I can have all the z-values almost same. Suppose the…
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Create 2D range map aligned with the 2D image from a 3D point cloud

I am interested in obtaining a 2D representation of a point cloud mapped from a known view point from which a registered optical image of the scene was taken using a digital camera. I have found an example of this here:…
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Kinfu with PMD Camboard Nano

Problem I wan't to use kinfu with my miniTOF camera (model: PMD Camboard Nano). I set up everything and kinfu works with Kinect. Solution!? Tweak *openni_launch* package to somehow start my camera or remap my camera outputs to the openni's one in…
alap
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Connected components in organized 3d point cloud data

Hy! I have organized point clouds from a Kinect sensor. Let's say I have a organized point cloud of a sofa with a table in front. What I would like the get are two clouds: sofa and table I am searching for some algorithm to get the connected…
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Bounding Box with PCA

I try to crete a Oriented Bounding Box with PCA. In the image you can see my results: Red points: point cloud Blue vectors: PCA components I tried to project the points on the vectors, in order to get the min, max and mean values. But how can I…
user2576458
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Efficient way to change a 3d map to point cloud matlab

I have a 3d map or matrix and I want to construct the point cloud from it. I've already done that using this code: function [pcloud, distance] = depthToCloud(depth, topleft) % depthToCloud.m - Convert depth image into 3D point cloud % Author:…
Tak
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