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Estimating the Location of a Camera with Respect to a 3D Model

Gehua Yang Gehua Yang, Jacob Becker, Charles V. Stewart
2007 3-D Digital Imaging and Modeling  
An algorithm is presented to estimate the position of a hand-held camera with respect to a 3d world model constructed from range data and color imagery.  ...  The overall algorithm is shown to effectively determine the location of the camera over a 100m x 100m area of our campus.  ...  through the NSF Engineering Research Centers Program under Award EEC-9986821, in part by the US Army Intelligence and Security Command.  ... 
doi:10.1109/3dim.2007.23 dblp:conf/3dim/YangBS07 fatcat:4gpc2r2zgbaudibo5rkf4oxh6q

3D human pose estimation model using location-maps for distorted and disconnected images by a wearable omnidirectional camera

Teppei Miura, Shinji Sako
2020 IPSJ Transactions on Computer Vision and Applications  
We focus on a characteristic of the location-maps that can extend 2D joint locations to 3D positions with respect to 2D-3D consistency without considering kinematic model restrictions and optical properties  ...  We propose a new location-maps-based model by replacing the backbone network with a state-of-the-art 2D human pose estimation model (HRNet).  ...  The location-maps for 3D human pose estimation location-maps method is one of the methods for extending 2D joint locations to 3D positions with respect to 2D-3D consistency on an image plane.  ... 
doi:10.1186/s41074-020-00066-8 fatcat:hdowsxnywnacbmatzyombnqd4i

Single View Camera Calibration for Augmented Virtual Environments

Lu Wang, Suya You, Ulrich Neumann
2007 2007 IEEE Virtual Reality Conference  
One of the key issues in creating such systems is to estimate the parameters of each camera including the intrinsic parameters and its pose relative to the 3D model.  ...  Moreover, due to noise, the estimated camera location may be far from the expectation of the users when the number of correspondences is small.  ...  The corresponding 3D lines of l 1 and l 4 cannot be located in the 3D model but we know that they are parallel to L 1 and L 2 respectively.  ... 
doi:10.1109/vr.2007.352494 dblp:conf/vr/WangYN07 fatcat:bp2rf7ltg5dp7kt3au3p2xrd4u

Calibration of Non-overlapping Cameras Using an External SLAM System

Esra Ataer-Cansizoglu, Yuichi Taguchi, Srikumar Ramalingam, Yohei Miki
2014 2014 2nd International Conference on 3D Vision  
We reduce the problem of calibrating the non-overlapping cameras to the problem of localizing the cameras with respect to a global 3D model reconstructed with a simultaneous localization and mapping (SLAM  ...  We reduce the problem of calibrating the non-overlapping cameras to the problem of localizing the cameras with respect to a global 3D model reconstructed with a simultaneous localization and mapping (SLAM  ...  Camera Localization Given the 3D model of the scene, our goal is to compute the pose of each camera with respect to the 3D model.  ... 
doi:10.1109/3dv.2014.106 dblp:conf/3dim/CansizogluTRM14 fatcat:linoyerozzhvppj77tadcjns2e

Beyond Weak Perspective for Monocular 3D Human Pose Estimation [article]

Imry Kissos, Lior Fritz, Matan Goldman, Omer Meir, Eduard Oks, Mark Kliger
2020 arXiv   pre-print
We consider the task of 3D joints location and orientation prediction from a monocular video with the skinned multi-person linear (SMPL) model.  ...  We use the SPIN algorithm and estimate initial predictions of body pose, shape and camera parameters from a deep regression neural network.  ...  Acknowledgements We thank the anonymous reviewers whose comments and suggestions helped improve and clarify this manuscript. We also thank our colleagues from Amazon Lab 126, Dr.  ... 
arXiv:2009.06549v1 fatcat:zi6zxbzfuvfinozj6vklgwdymq

Place Recognition via 3D Modeling for Personal Activity Lifelog Using Wearable Camera [chapter]

Hazem Wannous, Vladislavs Dovgalecs, Rémi Mégret, Mohamed Daoudi
2012 Lecture Notes in Computer Science  
It relies on 3D models of the places of interest that are built thanks to a lightweight semi-supervised approach.  ...  It takes advantage of a camera mounted on the shoulder, which is primarily designed for the behavioral analysis of Instrumental Activities of Daily Living (IADL).  ...  This work is partly supported by a grant from the ANR (Agence Nationale de la Recherche) with reference ANR-09-BLAN-0165-02, within the IMMED project. It was initiated during the stay of M.  ... 
doi:10.1007/978-3-642-27355-1_24 fatcat:hwpjb4lfcngg3oafgk2gwvxqka

Human Body Orientation Estimation in Multiview Scenarios [chapter]

Lili Chen, Giorgio Panin, Alois Knoll
2012 Lecture Notes in Computer Science  
In this paper, we propose an approach to simultaneously estimate the body orientation of multiple people in multi-view scenarios, which combines a 3D human body shape and appearance model with a 2D template  ...  In particular, the 3D model is composed of a generic shape made up of elliptic cylinders, and a 3D colored point cloud (appearance model), obtained by back-projecting pixels from foreground images onto  ...  To this aim, a 3D appearance model is reconstructed by back-projecting pixels from each 2D image onto the respective surfaces, at the estimated location.  ... 
doi:10.1007/978-3-642-33191-6_49 fatcat:vkcphlzfbfftvogjixnr3lfzte

Calibrating Head Pose Estimation in Videos for Meeting Room Event Analysis

Jilin Tu, Thomas Huang, Yingen Xiong, Travis Rose, Francis Quek
2006 2006 International Conference on Image Processing  
The 3D head pose is estimated in one of the camera coordinate system, we develop a procedure to accurately convert the estimated 3D pose in the camera coordinate system to that in the world coordinate  ...  As each subject in the meeting room can be observed by a pair of stereo cameras, we do 2D head tracking for the subject in each camera, and the 3D coordinate of the head can be obtained by triangulation  ...  Acknowledgement This research has been supported by the Advanced Research and Development Activity ARDA VACEII grant 665661: From Video to Information: Cross-Model Analysis of Planning Meetings.  ... 
doi:10.1109/icip.2006.313066 dblp:conf/icip/TuHXRQ06 fatcat:pplfzj72ajgfzd3tqjgrv3l6k4

MODELLING UNCERTAINTY OF SINGLE IMAGE INDOOR LOCALISATION USING A 3D MODEL AND DEEP LEARNING

D. Acharya, S. Singha Roy, K. Khoshelham, S. Winter
2019 ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences  
A deep Bayesian convolutional neural network is fine-tuned with synthetic images generated from a 3D model to estimate the camera pose of real images.  ...  The uncertainty of the estimated camera poses is modelled by sampling the outputs of the Bayesian network fine-tuned with synthetic images.  ...  This 3D model is used to generate synthetic images with known camera poses.  ... 
doi:10.5194/isprs-annals-iv-2-w5-247-2019 fatcat:jfvftyz4xbbo3b3nmqhmqiqoye

Ray3D: ray-based 3D human pose estimation for monocular absolute 3D localization [article]

Yu Zhan, Fenghai Li, Renliang Weng, Wongun Choi
2022 arXiv   pre-print
In this paper, we propose a novel monocular ray-based 3D (Ray3D) absolute human pose estimation with calibrated camera.  ...  To deal with the in-the-wild camera extrinsic parameter variations, Ray3D explicitly takes the camera extrinsic parameters as an input and jointly models the distribution between the 3D pose rays and camera  ...  Thus, naively learning a model to map from 2D pixel locations to 3D world locations is arguably prone to failure.  ... 
arXiv:2203.11471v2 fatcat:nertcfo265agvepebvzlhyeh54

Pix2Face: Direct 3D Face Model Estimation

Daniel Crispell, Maxim Bazik
2017 2017 IEEE International Conference on Computer Vision Workshops (ICCVW)  
Additionally, we propose a method for directly estimating a set of 3D Morphable Model (3DMM) parameters, using the estimated 3D landmarks and geometry as constraints in a simple linear system.  ...  The proposed method jointly estimates a dense set of 3D landmarks and facial geometry using a single pass of a modified version of the popular "U-Net" neural network architecture.  ...  The U.S. Government is authorized to reproduce and distribute reprints for Governmental purpose notwithstanding any copyright annotation thereon.  ... 
doi:10.1109/iccvw.2017.295 dblp:conf/iccvw/CrispellB17 fatcat:aaupabopqbdhreu5bmkje27wq4

Full 6DOF Pose Estimation from Geo-Located Images [chapter]

Clemens Arth, Gerhard Reitmayr, Dieter Schmalstieg
2013 Lecture Notes in Computer Science  
Estimating the external calibration -the pose -of a camera with respect to its environment is a fundamental task in Computer Vision (CV).  ...  Epipolar geometry inherently contains information about the relative positioning of the query camera with respect to each of the reference cameras, giving rise to a set of relative pose estimates.  ...  Thanks to Christian Pirchheim for valuable comments, Manfred Klopschitz for helping with data collection and preparation and to Albert Walzer for his efforts in video editing.  ... 
doi:10.1007/978-3-642-37431-9_54 fatcat:ttnjufc7yjfijkxzpqthy5n6sm

Pix2face: Direct 3D Face Model Estimation [article]

Daniel Crispell, Maxim Bazik
2017 arXiv   pre-print
Additionally, we propose a method for directly estimating a set of 3D Morphable Model (3DMM) parameters, using the estimated 3D landmarks and geometry as constraints in a simple linear system.  ...  The proposed method jointly estimates a dense set of 3D landmarks and facial geometry using a single pass of a modified version of the popular "U-Net" neural network architecture.  ...  The U.S. Government is authorized to reproduce and distribute reprints for Governmental purpose notwithstanding any copyright annotation thereon.  ... 
arXiv:1708.09006v1 fatcat:mkiy7zes4ve33epcqmudzu3gxm

Two-hand Global 3D Pose Estimation Using Monocular RGB [article]

Fanqing Lin, Connor Wilhelm, Tony Martinez
2020 arXiv   pre-print
Global joint locations with respect to the camera origin are computed using the hand pose estimations and the actual length of the key bone with a novel projection algorithm.  ...  We tackle the challenging task of estimating global 3D joint locations for both hands via only monocular RGB input images.  ...  In this paper, we present the first algorithm that simultaneously estimates the 3D global joint locations of both hands with respect to the camera origin using monocular RGB inputs (Fig. 1) , which is  ... 
arXiv:2006.01320v4 fatcat:axg2q7zwqjdw5ku47km3kyu4hm

A Master-Slave Calibration Algorithm with Fish-Eye Correction

J. C. Neves, J. C. Moreno, H. Proença
2015 Mathematical Problems in Engineering  
single static camera disposed on an arbitrary location of the scene.  ...  The use of fish-eye lenses allows the master camera to maximize the coverage area while the PTZ acts as a foveal sensor, providing high-resolution images of regions of interest.  ...  Conflict of Interests The authors declare that there is no conflict of interests regarding the publication of this paper.  ... 
doi:10.1155/2015/427270 fatcat:w4gbypyavrgs5ijwte276ivqam
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