Filters








1,268 Hits in 10.8 sec

ATIP: A Tool for 3D Navigation inside a Single Image with Automatic Camera Calibration [article]

Kevin Boulanger, Kadi Bouatouch, Sumanta Pattanaik
2006 Computer Graphics and Visual Computing  
The goal of this paper is to present a framework providing fully automatic and fast camera calibration for any view orientation without using a calibration target.  ...  a box textured using the input image data.  ...  Acknowledgements The authors are grateful to Eric Marchand and Murat Balci for their pertinent remarks on this work.  ... 
doi:10.2312/localchapterevents/tpcg/tpcg06/071-079 dblp:conf/tpcg/BoulangerBP06 fatcat:oxlep4fubnfzbfc42hjlgk5emi

New Techniques for Automated Architectural Reconstruction from Photographs [chapter]

Tomas Werner, Andrew Zisserman
2002 Lecture Notes in Computer Science  
We investigate a strategy for reconstructing of buildings from multiple (uncalibrated) images.  ...  In a similar manner to the Facade approach we first generate a coarse piecewise planar model of the principal scene planes and their delineations, and then use these facets to guide the search for indentations  ...  Acknowledgements We are very grateful to Frederick Schaffalitzky for computing the projective reconstructions for the triplets. Funding was provided by a Marie Curie fellowship and EC project Vibes.  ... 
doi:10.1007/3-540-47967-8_36 fatcat:uaa6ahwe35ei5kq2ladoq52ina

Practical camera auto-calibration based on object appearance and motion for traffic scene visual surveillance

Zhaoxiang Zhang, Min Li, Kaigi Huang, Tieniu Tan
2008 2008 IEEE Conference on Computer Vision and Pattern Recognition  
In addition, with calibrated cameras, we can make use of prior information of 3D models to estimate 3D pose of objects and make object detection or tracking more robust to noise and occlusions.  ...  Secondly, calibrated camera makes it possible to recover metrics from images which are robust to scene or view angle changes.  ...  and the CASIA Innovation Fund for Young Scientists.  ... 
doi:10.1109/cvpr.2008.4587780 dblp:conf/cvpr/ZhangLHT08 fatcat:rh62bzbggffpveq7uty7hubeku

Automatic registration of aerial imagery with untextured 3D LiDAR models

Min Ding, Kristian Lyngbaek, Avideh Zakhor
2008 2008 IEEE Conference on Computer Vision and Pattern Recognition  
In the first step, we combine vanishing points and global positioning system aided inertial system readings to roughly estimate the extrinsic parameters of a calibrated camera.  ...  In this paper, we develop an automated algorithm for texture mapping oblique aerial images onto a 3D model generated from airborne Light Detection and Ranging (LiDAR) data.  ...  Lee and Nevatia et al. use vanishing points and random sample consensus (RANSAC) based 3D-2D line pair match to find single view camera pose [10] .  ... 
doi:10.1109/cvpr.2008.4587661 dblp:conf/cvpr/DingLZ08 fatcat:22dj2pvmyzbzfmu5qbmwjue3ey

Key Issues in Modeling of Complex 3D Structures from Video Sequences

Shengyong Chen, Yuehui Wang, Carlo Cattani
2012 Mathematical Problems in Engineering  
Reconstruction of a scene object from video sequences often takes the basic principle of structure from motion with an uncalibrated camera.  ...  Construction of three-dimensional structures from video sequences has wide applications for intelligent video analysis.  ...  , 2010C33095 , and Zhejiang Provincial Natural Science Foundation R1110679 .  ... 
doi:10.1155/2012/856523 fatcat:2tcnq4tllvf4rpgurxuli2vci4

Multistage SFM: Revisiting Incremental Structure from Motion

Rajvi Shah, Aditya Deshpande, P. J. Narayanan
2014 2014 2nd International Conference on 3D Vision  
In this paper, we present a new multistage approach for SfM reconstruction of a single component. Our method begins with building a coarse 3D reconstruction using highscale features of given images.  ...  Our algorithm can reconstruct a 1000 images dataset in 15 hours using a single core, in about 2 hours using 8 cores and in a few minutes by utilizing full parallelism of about 200 cores.  ...  Upon obtaining sufficient number of 3D-2D matches, RANSAC based camera calibration is performed. The coarse model M 0 has fewer 3D points and can be directly used for localization.  ... 
doi:10.1109/3dv.2014.95 dblp:conf/3dim/ShahDN14 fatcat:kbl2szpkv5aqhfhusxo3cu7h4a

Computational rephotography

Soonmin Bae, Aseem Agarwala, Frédo Durand
2010 ACM Transactions on Graphics  
The input to our technique is a reference image taken from the desired viewpoint. The user moves through the scene with a camera and follows our visualization to reach the desired viewpoint.  ...  We guide 3D movement using two 2D arrows. We demonstrate the success of our technique by rephotographing historical images and conducting user studies.  ...  This work was supported by grants from Quanta, Shell, and Adobe. Thanks to the publishers of the rephotography books for their images.  ... 
doi:10.1145/1805964.1805968 fatcat:xmzv2oi565e35mus4e7behvfdq

Vanishing Point Extraction and Refinement for Robust Camera Calibration

Huan Chang, Fuan Tsai
2017 Sensors  
This paper describes a flexible camera calibration method using refined vanishing points without prior information.  ...  The experiment results indicate that the vanishing point refinement process can significantly improve camera calibration parameters and the root mean square error (RMSE) of the constructed 3D model can  ...  (a) A video frame calibrated using straight line segments; (b) Extracted lines and feature points for vanishing point estimation and 3D modeling.  ... 
doi:10.3390/s18010063 pmid:29280966 pmcid:PMC5795906 fatcat:kw7q3pe75fhtbgzhm5hfhkjstq

3D Trajectories from a Single Viewpoint using Shadows

I. Reid, A. North
1998 Procedings of the British Machine Vision Conference 1998  
We consider the problem of obtaining the 3D trajectory of a ball from a sequence of images taken with a camera which is possibly rotating and zooming (but not translating).  ...  Techniques are developed to compute the component of image motion of the ball due to camera rotation and zoom, using optic flow.  ...  into a distinguished plane using the image locations of the point and its shadow in a single view (section 3.1); We determine a full 3D reconstruction of the point using this construction and one devised  ... 
doi:10.5244/c.12.86 dblp:conf/bmvc/ReidN98 fatcat:r52nykl2lzhydgf7tuep3jtogq

Ball Position and Motion Reconstruction from Blur in a Single Perspective Image

Giacomo Boracchi, Vincenzo Caglioti, Alessandro Giusti
2007 14th International Conference on Image Analysis and Processing (ICIAP 2007)  
We consider the problem of localizing a moving ball from a single calibrated perspective image; after showing that ordinary algorithms fail in analyzing motion blurred scenes, we describe a theoretically-sound  ...  model for the blurred image of a ball.  ...  Introduction Basic projective geometry allows to reconstruct the 3D position of a sphere from a single perspective image, provided that the camera parameters and the sphere radius are known.  ... 
doi:10.1109/iciap.2007.4362762 dblp:conf/iciap/BoracchiCG07 fatcat:t4hxzkax6zbndgoui32zc3tnv4

Interactive images

Youyi Zheng, Xiang Chen, Ming-Ming Cheng, Kun Zhou, Shi-Min Hu, Niloy J. Mitra
2012 ACM Transactions on Graphics  
⇒ Figure 1 : Starting from single images with segmented interest regions, we generate cuboid proxies for partial scene modeling enabling a range of smart image manipulations.  ...  We demonstrate our system on a range of real-world images and validate the plausibility of the results using a user study.  ...  We thank the anonymous reviewers, Danny Cohen-Or, and Peter Wonka for their many useful comments and feedback; Duygu Ceylan, Hung-Kuo Chu, and Yongliang Yang for proof-reading the paper draft; and Sawsan  ... 
doi:10.1145/2185520.2335450 fatcat:wlhnczp7i5b6la4b7jsaegkms4

Interactive images

Youyi Zheng, Xiang Chen, Ming-Ming Cheng, Kun Zhou, Shi-Min Hu, Niloy J. Mitra
2012 ACM Transactions on Graphics  
⇒ Figure 1 : Starting from single images with segmented interest regions, we generate cuboid proxies for partial scene modeling enabling a range of smart image manipulations.  ...  We demonstrate our system on a range of real-world images and validate the plausibility of the results using a user study.  ...  We thank the anonymous reviewers, Danny Cohen-Or, and Peter Wonka for their many useful comments and feedback; Duygu Ceylan, Hung-Kuo Chu, and Yongliang Yang for proof-reading the paper draft; and Sawsan  ... 
doi:10.1145/2185520.2185595 fatcat:dup3uvugarexllurdbs4prbeai

Robust and Accurate Line- and/or Point-Based Pose Estimation without Manhattan Assumptions [chapter]

Yohann Salaün, Renaud Marlet, Pascal Monasse
2016 Lecture Notes in Computer Science  
We also define a parameterless (a contrario) RANSAC-like method to discard calibration outliers and provide more robust pose estimations, possibly using points as well when available.  ...  Usual Structure from Motion techniques based on feature points have a hard time on scenes with little texture or presenting a single plane, as in indoor environments.  ...  Introduction Structure from Motion (SfM) techniques are now able to reliably recover the relative pose of cameras (external calibration) in many common settings, enabling 3D reconstruction from images  ... 
doi:10.1007/978-3-319-46478-7_49 fatcat:6dkp426hwbdajh55mcrbmt4cdm

Interactive 3D architectural modeling from unordered photo collections

Sudipta N. Sinha, Drew Steedly, Richard Szeliski, Maneesh Agrawala, Marc Pollefeys
2008 ACM SIGGRAPH Asia 2008 papers on - SIGGRAPH Asia '08  
Our approach enables us to accurately model polygonal faces from 2D interactions in a single image. Our system also supports useful operations such as edge snapping and extrusions.  ...  We utilize vanishing point constraints at multiple stages during the reconstruction, which is particularly useful for architectural scenes where parallel lines are abundant.  ...  Vanishing points have been extensively studied along with the geometry of image formation and have been found useful for camera calibration and 3D reconstruction from a single uncalibrated image [Criminisi  ... 
doi:10.1145/1457515.1409112 fatcat:vrtx4xi3rrgmpljxi4f5e2mp5e

Self-calibration from turn-table sequences in presence of zoom and focus

Xiaochun Cao, Jiangjian Xiao, Hassan Foroosh, Mubarak Shah
2006 Computer Vision and Image Understanding  
This paper proposes a novel method, using constant inter-frame motion, for self-calibration from an image sequence of an object rotating around a single axis with varying camera internal parameters.  ...  The results are refined by enforcing the global constraints that the projected trajectory of any 3D point should be a conic after compensating for the focusing and zooming effects.  ...  Using our twostage non-linear optimization, the results are refined from a coarse starting point to a fine level for both f and u 0 .  ... 
doi:10.1016/j.cviu.2006.01.004 fatcat:q22rilnppranzegy5ok3s2cojq
« Previous Showing results 1 — 15 out of 1,268 results