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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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How to export a reconstructed 3D model with texture using insight3d

I am using the open-source structure-from-motion program: insight3D to reconstruct a 3D model from a set of 2D images. I was able to export the resulting model as an VRML (.wrl) file but the texture and texture coordinates were not included when I…
Ken Toh
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3d surface reconstruction using openCV examples

I am trying to perform a 3D surface reconstruction from a stereo configuration with OpenCV example files. I have created a stereo camera from 2 web cams. I have obtained the calibration parameters using stereo_calib.cpp (…
Fobi
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Stereo Calibration and 3D Reconstruction Issue

I am trying to perform stereo camera calibration and 3D reprojection of a calculated disparity image. For the sake of simplicity I made this example in Matlab but getting the same result in Python and OpenCV. I use this piece of code for the…
schurist
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Homogeneous transform of point clouds in camera coordinates to world coordinates using OpenCV

I have camera calibration intrinsics and extrinsics (including rotations and translations, i.e. rvecs and tvecs, for a set of N camera poses, relative to a fixed ChArUco target. Additionally, for every camera pose, I have a set of 3D coordinates…
legel
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Triangulation of encoded points from Structured Light Scanning produces warped point cloud

I've been trying to code a 3D scanner that uses structured light (one camera and projector only). I'm using Taubin and Moreno's software (at their site that is somehow down right now, use wayback machine to check it out.) to obtain the projector…
YayaPapaya
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PointCloud from array of disparity map

I have to reconstruction a 3d object from a set of image. Suppose i have already done the camera calibration for all the images (form example 10 images, all of them display the subject in different angles). I create an array of disparity map (for…
Maurizio Terreni
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How to calculate translation matrix?

I have 2D image data with respective camera location in latitude and longitude. I want to translate pixel co-ordinates to 3D world co-ordinates. I have access to intrinsic calibration parameters and Yaw, pitch and roll. Using Yaw, pitch and roll I…
Kamble Tanaji
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Image to ECEF Transformation Matrix from Roll,Yaw,Pitch and GPS+Altitude

I am trying to estimate initial camera pose with respect to ECEF system using EXIF metadata. I have the a DJI Drone's gimbal Roll, Pitch and Yaw readings along with the Latitude, Longitude and Altitude. Assuming these values are fairly accurate, I…
Raunaq Trivedi
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How to increase aruco detection accuracy?

I have filmed an object on aruco board from two positions with the same camera. I've undistorted images and calibrated camera before work. I take one red point on one shot and calculate 3d line, which corresponds to this point 3D space, and then…
Stepan Yakovenko
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3D Recontruction from only two 2D images w/ iPhone 7 camera

The Main Problem: Reconstruct an object from only 2 images (at least what can be perceived from the 2 images). About Camera: I'm using an iPhone 7 camera and I'm taking my own pictures meaning I can calibrate my camera. I can obtain the focal length…
maxmine11
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Need help understanding the Perspective-Three-Point

I'm following this explanation on the P3P problem and have a few questions. In the heading labeled Section 1 they project the image plane points onto a unit sphere. I'm not sure why they do this, is this to simulate a camera lens? I know in OpenCV,…
Carpetfizz
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Projective or Euclidean 3D- Reconstruction?

I have problems understanding if I get an euclidean reconstruction result or just a projective one. So at first let me tell you what I've done: I have two stereo images. The images are SEM images and are eucentrically tilted. The difference of tilt…
Miau
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How is a Line Represented in Epipolar Geometry?

The 3D reconstruction literature all mentions the following relationship: Given a point m1 in the first image, the homogeneous coordinates of the epipolar line l2 in the second image corresponding to m1 are l2 = Fm1. However, I can't get my head…
Jabberwock
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3D Reconstruction and SfM Camera Intrinsic Parameters

I am trying to understand the basic principles of 3D reconstruction, and have chosen to play around with OpenMVG. However, I have seen evidence that the following concepts I'm asking about apply to all/most SfM/MVS tools, not just OpenMVG. As such,…
smeeb
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Scene reconstruction after dense SIFT

I am using vl_dsift in MATLAB to compute dense SIFT features in a pair of stereo images. The feature correspondences seem to be correct more or less, but when I triangulate my 3D cloud is flat, that is all points have the same depth, which is not…
Controller
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