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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.

366 questions
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Getting depth map

I can't get normal depth map from disparity. Here is my code: #include "opencv2/core/core.hpp" #include "opencv2/calib3d/calib3d.hpp" #include #include #include…
Aram Gevorgyan
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Depth Error Vs baseline

Depth Error Vs baseline How is depth error related with baseline? In another way why short baseline leads to large depth error and long baseline leads to small depth error.
user3624303
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Essential Matrix from Fundamental Matrix in OpenCV

I've already computed the Fundamental Matrix of a stereo pair through corresponding points, found using SURF. According to Hartley and Zisserman, the Essential Matrix is computed doing: E = K.t() * F * K How I get K? Is there another way to compute…
JuaniL
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Removing the Water Tight-ness property from the mesh constructed by poisson reconstruction using Point Cloud Library

I would like to generate visually appealing surface reconstruction from the the point clouds. I am using point cloud library. I tried creating a mesh using poisson reconstruction method but later found that it gives a water tight reconstruction. For…
Sai
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transforming projection matrices computed from trifocal tensor to estimate 3D points

I am using this legacy code: http://fossies.org/dox/opencv-2.4.8/trifocal_8cpp_source.html for estimating 3D points from the given corresponding 2D points from 3 different views. The problem I faced is same as stated here:…
magarwal
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3d reconstruction from calibrated camera images

I am working on 3d reconstruction. And now when I consider a pair of images. I have a set of corresponding points . and I have my camera details. For example I have focus details,Rotation and Translation matrix(4*4). and I want to project my points…
user1771732
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Reconstruct 3D-Coordinates in Camera Coordinate System from 2D - Pixels with side condition

I am trying to reconstruct 3D-Coordinates from the 2D-Pixel-Coordinates in a Camera Picture using a side condition (in MatLab). I do have extrinsic and intrinsic camera parameters. Using homogenous transformation I can transform 3D-Coordinates from…
EliteTUM
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How to create a 3D image with series of 2D Image

I have series of 2D tiff images of a sample, I want to create or reproduce 3D image/volume using those 2d image for 3D visualization. I found this link Reconstructing 3D image from 2D image have similar question but It discussed about CT…
akshahi17
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principle point in camera matrix ( programming issue)

In a 3x3 camera matrix what does the principle point do? how its location is formed? can we visualize that? It is told that the principle point is the intersection of optical axis with the image plane. but why it is not always in the center of…
C graphics
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Issues calculating circumcenter of a tetrahedron

I'm trying to calculate the circumcenter of a tetrahedron using C# and I'm using the formula supplied on Wikipedia to accomplish this. Here's what I tried in C#. It seems that the calculated point is always significantly misaligned. I checked my…
Renge
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Optimizing the stereo calibration process on multiple cameras

Background: For simplicity, I have 3 Cameras. Each one of them is calibrated by its own (its interstice parameters are known and accurate enough) They all share almost the same view. I want to use this system of 3 Cameras for 3D reconstruction. I…
Humam Helfawi
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How do ARCore or ARKit produce real-time augmentations of live video?

So a while back about a year ago I was interested in building my own barebones augmented reality (AR) library. My goal was to be able to take a video of something (anything really) and then be able to place augmentations (3D objects that weren't…
smeeb
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Depth from stereo camera with different focal length

I am working on stereo camera depth estimation. However, for particular purpose, I need to use two camera with different FOV and focal length. After a lot of Google research, I know that I can still calibrate the two camera and rectify them to…
王福恩
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OpenNI Intrinsic and Extrinsic calibration

How would one extract the components of the intrinsic and extrinsic calibration parameters from OpenNI for a device such as the PrimeSense? After some searching I only seem to find how to do it through ROS, but it is not clear how it would be done…
Jack H
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Structure from Motion with Optical Flow

Let say I have a video from a drive recorder. I want to construct the recorded scene's points cloud using structure from motion technique. First I need to track some points. Which algorithm can yield a better result? By using the sparse optical flow…
Hafiz Hilman Mohammad Sofian
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