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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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MemoryError in numpy.append despite enough RAM

I've been trying to append a list of points of a pointcloud read with laspy to another list of points, basically merging two pointclouds. When merging multiple pointclouds I have been appending all points to the same np.ndarray in order to save it…
viddie
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Using RGB images and PointCloud, how to generate depth map from the PointClouds? (python)

I am working on fusing Lidar and Camera images in order to perform a classification object algorithm using CNN. I want to use the KITTI Dataset which provide synchronized lidar and rgb image data. Lidar are 3D-scanners, so the output is a 3D Point…
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I want to generate a mesh from a point cloud in Python

I have a point cloud from different parts of the human body, like an eye and I want to do a mesh. I tried to use Mayavi and Delaunay but I don't get a good mesh. The points of the cloud are in total disorder. I have my point cloud in .npz…
Joel_Developer
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PCL: Failed to find match for field 'rgba'

I am using the tutorial codes of two projects from the PCL page. One is to save a pointcloud, the other is to visualize (it's frustrating that both don't exist in a simple project, unbelievable). This is how I save the cloud: #include…
Schütze
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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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3d cloud viewer?

I have a file which contains a bunch of points with their x,y, z locations.I am looking for a simple viewer where in I can load this point data and view it .Rotation is essential for me to check the depth of the cloud being generated .Can someone…
Manish
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Collouring Android Sceneform PointCloud by confidence value

I want to collourize the PointCloud by it's confidence value. First I create three FloatBuffer, where I put single Points based on a threshold. private FloatBuffer makeFLoatBuffer(ArrayList conf) { FloatBuffer confFB =…
Sceada
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Convertion of .ply format to .pcd format

I've a .ply format model and trying to create a .pcd file one. After checking how .pcd format should look like and writing some code to convert it to .pcd format, my results are that the model is black colored only, instead of multi-colored like the…
Ilan Aizelman WS
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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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update live pointcloud data in vtk python

I have a basic question as i am new to VTK. I have to draw live point cloud data in VTK. I have modified the code given in How to display point cloud in vtk in different colors?. The pointcloud should update for number of times given in…
Shubham Singh
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How to measure average distance between neighbors for a point cloud in MeshLab

I am trying to mesh a point cloud, and calculate Gaussian and Mean curvature. I am using Meshlab. I am trying to measure the average point cloud density, to be used in measuring curvature (APSS). The function "Radius from density" of a point cloud…
Nakul
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GLSL truncated signed distance representation (TSDF) implementation

I am looking forward to implement a model reconstruction of RGB-D images. Preferred on mobile phones. For that I read, it is all done with an TSDF-representation. I read a lot of papers now over hierarchical structures and other ideas to speed this…
Dominick
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Finding nearest neighbors within a distance and taking the average of those neighbors using cKDTree

I'm using python scripting to read in two large (millions of points) point clouds as arrays ("A" and "B"). I need to find the nearest "B" neighbors of the points in "A", but within 5 cm of each point in "A". I also want to average the neighbors…
brainier7
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Allocate CUDA device memory for a point cloud with increasing dimension (number of point)

I'm writing a program in which I need to: make a test on each pixel of an image if test result is TRUE I have to add a point to a point cloud if test result is FALSE, make nothing I've already wrote a working code on CPU side C++. Now I need to…
dbovo89
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Corner detection in an array of points

I get a pointcloud from my lidar which is basically an numpy array of points in 2D cartesian coordinates. Is there any efficient way to detect corners formed by such 2D points? What I tried until now was to detect clusters, then apply RANSAC on each…
Mehdi
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