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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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Can you recommend a source of reference data for Fundamental matrix calculation

Specifically I'd ideally want images with point correspondences and a 'Gold Standard' calculated value of F and left and right epipoles. I could work with an Essential matrix and intrinsic and extrinsic camera properties too. I know that I can…
Dave Durbin
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Image-based reconstruction using triangulation

I'm currently trying to implement the triangulation algorithm proposed by Hartley and Sturm (here) and I'm having some difficulties. I think I understand the idea behind it, but I'm not sure how to parameterize the pencil of epipolar lines. Given…
zync
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Structure from Motion (SfM) in a tunnel-like structure?

I have a very specific application in which I would like to try structure from motion to get a 3D representation. For now, all the software/code samples I have found for structure from motion are like this: "A fixed object that is photographed from…
Jean-François Côté
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Issue with cvReprojectImageTo3D and CV_32FC3

I need your help. I have implemented stereo calibration, rectification using my stereo pair. I have got a disparity image which is quite reasonable. The problem that I face is with cvReprojectImageTo3D.I have used stereobM. And rectified in a…
nbsrujan
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Conjugate gradient 2D image reconstruction Matlab

I'm working on a project where I should use the conjugate gradient method to reconstruct an SPECT image given the sinogram of the image with the help of matlab. I have realized that the linear equation Ax=b needs to be solved, where b is an…
shizzle
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Visual SLAM on Android Device using single-frame Pointclouds

I have developed a Python application that uses the Intel RealSense D455 camera and the library open3d to perform realtime and, later, slower high definition 3d reconstruction. The algorithm used to achieve this is SLAM. Now, I'm looking everywhere…
vittoema96
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Questions about the parameters T and t in the stereoCalibrate function and recoverPose function in Opnecv

I want to verify the rotation matrix and translation vector of the intrinsic matrix factorization calculated by SFM with the rotation matrix and translation vector calculated in the binocular calibration with two cameras. ` …
JunWen Si
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Can not squeeze dim[4], expected a dimension of 1, got 3

I am working with project where model take 3D cuboid as input, and reconstruct 3D cuboid. I am getting error: ValueError: Can not squeeze dim[4], expected a dimension of 1, got 3 for '{{node Squeeze}} = Squeeze[T=DT_FLOAT,…
Abhay Sardhara
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Raycasting render 2d chest CT scans to 3d using OPENGL/C++

I am going to split this question in 3 parts First, I've been given this problem, and I don't know where to start, if you have been solving related problem, would you give me some hints and keywords to help me do some more research? I have done some…
Ade
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Python and OpenCV: -215:Assertion failed error when trying to call calibrateCamera

I am new to OpenCV and trying to follow an online tutorial on 3D reconstruction of a chessboard image. I am using the following code for the process: import glob import cv2 import numpy as np chessboard_size = (7,5) criteria =…
saadurr
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How can I convert cordinates from rectified stereo to original coordinates in opencv?

I am using this code to rectify stereo pair of images: stereoRectify(cm, Mat(), cm, Mat(),imageSize, RT_d,tt,R1,R2,P1,P2,Q,CALIB_ZERO_DISPARITY, 0.9, imageSize, &validROI[0], &validROI[1]); initUndistortRectifyMap(cm, Mat(), R1, P1,…
Stepan Yakovenko
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3D Scan interior room and map with equirectangular image

I'm currently looking at the best way for me to scan an interior room using equipment that isn't too expensive. There's a system out there that takes the picture and scans the room but cost is about $4500. I came across another device called…
FabricioG
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Computing depthmap from 3D reconstruction model

I'm using VisualSfM to build the 3D reconstruction of a scene. Now I want to estimate the depthmap and reproject the image. Any idea on how to do it?
Hercules
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Wrong rectification in MATLAB

The rectification function in Matlab seems to be responding wrong. Can anyone let me know if I am getting the right output? Left Image Right Image Anaglyph of unrectified images Anaglyph of rectified images Here is my code: leftImageSnapshot =…
Aakaash Jois
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3-dimension construction with programming language

Ihave images (pictures) taken with computerized axial tomography' (CAT) scan,and i want to release a construction 3d from these pictures, first of all i want to know which programming language is the best open cv or open gL? tkanks for your answer
jumar
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