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Questions tagged [3d-reconstruction]

In computer vision and computer graphics, 3D reconstruction is the process of capturing the shape and appearance of real objects.

This tag should be used for programming issues related to 3D reconstruction in the field of computer vision.

3D reconstruction consists in creating a 3-dimensional model of an object or scene from several 2-dimensional images of it.

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3D face reconstruction using MATLAB

I am doing a 3D face modeling project. I have currently developed an algorithm which maps texture from 3 input images of a face (front and 2 sides) to a base model using MATLAB. I would like to improve my algorithm so that it will deform the generic…
Hasitha Ediriweera
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3d reconstruction from 2 views

I'm doing some study on the 3d reconstruction from two views and fixed known camera focal length. Something that is unclear to me is does triangulation gives us the real world scale of an object or the scale of the result is different to the actual…
Ali Ghazi
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Camera orientation(for volume carving) using Ground Plane Homography and Height

I am trying to implement 3D reconstruction technique used in this paper i.e. Volume Carving I am using the terrace dataset which has videos from four different views. I have extracted foreground from these videos. For using volume carving now I…
Rahul Sankhwar
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Calculate 2D-3D correspondences using opencv

I work on 2d image point and 3d model point correspondences. Firstly, I use below code : cv::Mat cameraMatrix(3, 3, cv::DataType::type); cv::setIdentity(cameraMatrix); std::cout << "Initial cameraMatrix: " << cameraMatrix <<…
zakjma
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Calculate new PixelCoordinates Point with R and t

I know for a 3d reconstruction you can get everything except the scale factor from two images. But can you calculate where one Point from the first images sits in the second images. The scale factor shouldn't be interesting here?! sensorCheckPoint.x…
user3077796
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Mesh to mesh. Mesh fitting (averaging). Mesh comparison.

I have 3 sets of point cloud that represent one surface. I want to use these point clouds to construct triangular mesh, then use the mesh to represent the surface. Each set of point cloud is collected in different ways so their representation to…
Aaron
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Matlab Programming: 3D radon transform using iradon.m function

I'm doing a piece of Matlab code for reconstruction of radial 3D NMR data. However, since the radon functions built into Matlab are only 2D, I will have to apply them twice. After the first iradon transform in my code I get out projections of the…
Chris88
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Scene reconstruction under rotation and little camera movement

I'm trying to implement some kind of object detection with depth measurement using a mono-camera which is mounted near by the center of rotation of a door. The basic idea is to detect objects in front of the door (when swinging up) and create a…
Matthias Preu
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Interferences while using two ToF cameras

Im using a DS325 from SoftKinetic and a Creative Senz3D at the same time with the DepthSense-SDK and the Point-Cloud-Library (on Ubuntu 15.04). But I got strong interferences. Is there a possibility to control the laser (software side) either to…
Nico R.
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Slight changes in rotation matrix completely destroying stereo reconstruction

I am trying to reconstruct a scene in 3D based on iamge features and projection matrices (computed through feature matching and essential matrix computation) of two cameras, all of this in OpenCV. I am encountering a strange problem with…
HighVoltage
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OpenCV - things to do between stereoCalibrate and collecting 2x2D coordinates

I've calibrated a pair of cameras, I have a loop where markings on a person's legs are being tracked and their positions saved. What now? Do I have to cv::undistort the images before saving the pixel coordinates? Is there anything else that has to…
Petersaber
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Camera and projector calibration

I have a question about camera calibration. I've followed approach shown in a book Learning OpenCV for camera calibration process. But the calibrated(undistorted) image is worse than the original one. Is it possible that my camera don't need…
J3nc3k
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Surface Reconstruction from Cocone algorithms

I have a 3D point cloud that I attained from tracing out the outline of a shape with sensors attached to my fingertips. The resulting data has non-uniform density with large gaps between some of the points. What are some good surface reconstruction…
Mike Petersen
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Serialization error during parfor

I am working on a project that involves 2D projections of a specimen and i am require to transform it into cross-sectional image and then stack each cross sections to get a 3D image. I using Matlab for my simulations but as it involves huge data…
Tushar Anchan
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How can I calculate the Focal Length of my rendered image in a ray tracer (Let's say PBRT)?

Actually, I have rendered 3 input images of a sphere with different light directions in PBRT. As the next step of the process, I am going to compute surface normals of this sphere, so I need to put the Focal length value in my formula. All that I…
Ali Sharifi B.
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