Stack Overflow
Stack Overflow

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
1
vote
0 answers

How can 3D structure of scene be determined from video frames?

This is an exam question, related to 3D reconstruction from images. The figure below shows a frame from a video sequence obtained by a single video camera moving through a static indoor scene. The sequence of images is to be used to generate 3D…
korujzade
  • 400
  • 4
  • 23
1
vote
0 answers

How to solve Kruppa's Equations for self calibration for images

I have a set of uncalibrated images (4 or 5 images). In each of those images, I have detected 60 feature points and have matched them in each image. It can be assured that this is accurate upto a very good scale. Now , a need a method to calibrate…
Anant Simran Singh
  • 627
  • 6
  • 14
1
vote
0 answers

Estimating the relative pose from 2D-2D correspondances within RANSAC

From the essential matrix decomposition, we obtain rotation and translation in pairs of reflected matrices. This leads to 4 possible (Rc,c', tc,c') pairs for each feature triangulation. I'm using the essential matrix estimation within RANSAC to…
Sinem
  • 63
  • 1
  • 10
1
vote
1 answer

3D reconstruction using inbuilt functions in matlab (radon and iradon )

Can we use radon and iradon for CT scanned images and produce 3D slices. Surely radon,iradon works well with phantom, will it work with real CT projections? I have CT images taken from different angles of an object . Can i use inbuilt radon-iradon…
Amjad N
  • 13
  • 5
1
vote
1 answer

Why opencv's triangulatePoints return false results?

I'm working on opencv's triangulatepoints and have some problems. Here is my work: STEP 1. I generate seven 3D points by function generate3DPoints() [0.5, 0.5, -0.5] [0.5, 0.5, 0.5] [-0.5, 0.5, 0.5] [-0.5, 0.5, -0.5] [0.5, -0.5, -0.5] [-0.5, -0.5,…
Roger
  • 11
  • 2
1
vote
1 answer

Rotation Estimation between two images

I want to get the rotation between two images taken from the same camera (known intrinsic). I have a nearly perfect pure rotation! I use findhomography but if there is a little translation movement I get four results. Is there a way to force the…
user3077796
  • 192
  • 1
  • 19
1
vote
2 answers

Struggling with steps for 3D reconstruction (Matlab)

We've been asked to do 3D reconstruction (masters module for PhD), and I'm pulling my hair out. I'm not sure if I'm missing any steps, or if I've done them wrong. I've tried to google the code, and replace their functions with mine, just to see if I…
Gentatsu
  • 696
  • 1
  • 6
  • 26
1
vote
1 answer

Independent rotation of stereoscopic cameras

I have two cameras pointing at the same scene. When they are parallel to each other, I can convert from a real location to each screen coordinate and from two screen coordinates to a real location. From a real location to each screen coordinate…
gregoiregentil
  • 1,793
  • 1
  • 26
  • 56
1
vote
0 answers

Recovering pose from essential matrix gives inconsistent sign of translation vector

I have three views with point correspondences and I want to compute the pose of the camera at the second and the third view. I therefore generate a random dataset (no noise) containing points in the different views with known rotation and…
takahashi
  • 2,081
  • 3
  • 14
  • 24
1
vote
1 answer

Augmented reality 3D reconstruction

I want to develop an android augmented reality application, in which app should have a function to reconstruct a destructed objects(ex : buildings/statues) as shown in the following video link https://www.youtube.com/watch?v=WOVjISxlhpU I have gone…
Mayuran Ramanathan
  • 11
  • 2
1
vote
1 answer

opencv sgbm produces outliers on object edges

I am using opencv sgmb for stereo disparity computation in order to reconstruct some simple object put on the table. Everything works more or less well, except that on the edges of the object I find some outliers stuck it with the color of the…
user3847160
  • 98
  • 11
1
vote
3 answers

Project Tango strange rotation visualisation

I am working on 3D reconstruction with tango. Our system is quite similar to KinectFusion, which uses voxel representation, but use Tango as tracker. Left image (in video linked below) is rendered by Raycast at current pose (given by tango) in real…
Egoist_sx
  • 329
  • 5
  • 13
1
vote
0 answers

Stereopairs datasaet with calibration information

Can you give me stereo pairs dataset with camera calibration information? That has Q matrix that I need for OpenCV reprojectImageTo3D function or has such information that I can construct Q matrix. Or at least dataset with focal length in mm and…
Aram Gevorgyan
  • 2,175
  • 7
  • 37
  • 57
1
vote
1 answer

MATLAB 3D sparse reconstruction issues. Somehow I can't get the final scatter plot of the points to work

I'm trying to reconstruct the shape of a sail. I'm using the 3D sparse reconstruction method. I'm using two cameras with which I took two pictures. I managed to do the calibration of such cameras too. In the pictures it is possible to see the…
Riccardo Camin
  • 11
  • 1
1
vote
1 answer

Creating a 3D map with 2D depth images in PROCESSING

I'm creating a 3D map with 2D depth images in Processing. I have captured the images using saveFrame(), however I am having difficulty in converting those saved frames into 3D. Is there any website or code I could look through for help? Any help…
user3532819
  • 21
  • 1
  • 2
1 2 3
…
24 25