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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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Python: solvePnP( ) not enough values to unpack?

I'm having problem with a function called cv2.solvePnP from OpenCV. This function is used to get a pose estimation of a chess board. After the following code I get an error: for fname in glob.glob('Images/Calibragem/img1*.jpg'): img =…
Mateus Arruda
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why the points I reconstructed are not in a same coordinate?

I use binocular camera to reconstruct points in 3d from 2d picture,I took many pictures by binocular camera and reconstructed points(feature points have been found already),but I found that the 3d models I reconstructed are not in a same…
Wang.J
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Why iradon returns negative pixel values?

I took 200 projections at a step angle of 1.8 degrees using LabVIEW software. The size of the image is 2748 x 2748 pixels, uint16. Then using Matlab, I load the projection images, do the flat field correction, resize the image by 1/3 and save the…
user8443638
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Structure from motion vs Structure and motion

I would like to know the main difference between "structure from motion" and "structure and motion". I think it is the same thing because the result is same and the methods are also same as it is to reconstruct in 3D the environment. But in some…
user7249049
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Cython, Complex values, and BM3D algorithm

I am working on a image reconstruction algorithm and I found this repo online that would work great with my code, but unfortunately it doesnt seem to support complex valued calculations. I've read up on cython the past couple of days, but I'm…
paggers
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Real Time pose estimation of a textured object

I'm working on an AR application where the marker is a 3d object with a complex shape, so I'm trying to make a cad-based recognition system as a first step. as far as I found the main steps for building a 3d model from a set of images is: 1-to loop…
Lisa.s
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Unable to run programs of SFM module in OpenCV

I am getting an error when I am trying to execute a sample code in SFM module. Initially SFM was not present in my contrib directory. So i downloaded the latest contrib and pasted the sfm folder in my contrib directory. I used the CMakeLists.txt…
Shubham Lohakare
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3D face reconstruction from single image

I want to make 3d face reconstruction from single image.I googled around and found https://github.com/mkorunoski/3D-Face-Reconstruction/ .This link uses below values for 3D reconstruction: const cv::Point3f modelPointsArr[] = { …
user1368271
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How to animate 3d Reconstructed face models

I'm making an app that is based on unity3d game engine and targeted to IOS and Android platform. The core function of this app is that : users needs to input a 2d frontal face photo and the app will produce a 3d reconstructed face model which looks…
Yulong Frank Zhang
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C++ library to obtain regular meshes from a 3D file format such as STL

It seems there are some libraries including CGAL to generate meshes from a 2D or 3D model. Question: In C++ environment, what is the best way to obtain a set of regular nodes to represent an object that is given by a 3d file format such as the…
K.Epf
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Marching Cubes Reconstruction - Vector subscript out of range

I am trying to generate mesh from a point cloud using Marching Cubes algorithm implemented in PCL. I am adapting the code given at https://github.com/atduskgreg/pcl-marching-squares-example/blob/master/marching_cubes.cpp to my point cloud (my code…
mozendi
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iphone 6s camera calibration parameters

How can I get camera calibration parameters for iphone 6s? I need the following intrinsic parameters: Cam_fx: normalized focal length in x Cam_fy: normalized focal length in y Cam_cx: normalized camera center in x Cam_cy: normalized camera center in…
vacky
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Questions after ICP for point clouds when mesh

I am having problems with mesh for the merged point clouds using ICP algorithm. Firstly, I have several point clouds of different view points for the same scene. And I register them using ICP(Iterative closest point). Then I use the software such…
Mike_Peng
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From 3D Sparse to dense reconstruction

What are the possible ways to reconstruct a 3D dense model from a 3D sparse set of points. I tried interpolation but The 3D scene includes different objects in different groups of depths. What can I do to distinguish the objects?
Elena Stamatelou
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Same 3D coordinate during generating point cloud from stereo vision using Opencv and Python

I am really new to OpenCV and 3D reconstruction. I tried to generate point clouds from 2 images taken by a camera. I calibrated the camera using this library. Here I got the intrinsic parameters of the camera. I used ORB feature detector and…
Bashima
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