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Catadioptric projectors
2009
2009 IEEE Conference on Computer Vision and Pattern Recognition
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We demonstrate the practical uses of catadioptric projectors in panoramic and omni-directional projections. ...
Furthermore, we present a projection defocus analysis for reflector and thin refractor based catadioptric projectors. ...
To model projection geometry, a projector is commonly treated as a virtual pinhole camera and classical perspective geometry can then be directly applied to analyze the projection process [20] . ...
doi:10.1109/cvprw.2009.5206622
fatcat:exvcubbf7vestifw6cyhjtdsa4
Catadioptric projectors
2009
2009 IEEE Conference on Computer Vision and Pattern Recognition
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We demonstrate the practical uses of catadioptric projectors in panoramic and omni-directional projections. ...
Furthermore, we present a projection defocus analysis for reflector and thin refractor based catadioptric projectors. ...
To model projection geometry, a projector is commonly treated as a virtual pinhole camera and classical perspective geometry can then be directly applied to analyze the projection process [20] . ...
doi:10.1109/cvpr.2009.5206622
dblp:conf/cvpr/DingXTY09
fatcat:s6cymqu44bcxvebtwc4xztyg3i
Automatic calibration of a single-projector catadioptric display system
2008
2008 IEEE Conference on Computer Vision and Pattern Recognition
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We describe the calibration of a catadioptric omnidirectional video-projection system that adjusts its projection to the geometry of any scene by means of a rotating camera. ...
Simulation is used to validate estimated values of parameters and distance between the 3D reconstruction of the projection room and its expected geometry. ...
Acknowledgements This work is funded by the Audiovisual and Multimedia Program of the French National Agency for Research (Catopsys project). ...
doi:10.1109/cvpr.2008.4587788
dblp:conf/cvpr/AstreSLZ08
fatcat:f7fsf74lkzal3e3h7ojlub77ke
Automatic 3D Reconstruction from a Single Catadioptric Omnidirectional Image
2010
International Journal of Virtual Reality
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According to the classification results, we recover the geometry based on the catadioptric projection model. ...
Firstly, we classify the catadioptric omnidirectional image to horizontal ground, vertical building surface and vertical background surface through the registration between catadioptric omnidirectional ...
We next recovered the geometry according to the catadioptric projection model. The whole processing is fully automatic. ...
doi:10.20870/ijvr.2010.9.3.2779
fatcat:sugdcr34xbe5nn73n3pu6u3u3e
HOPIS: Hybrid Omnidirectional and Perspective Imaging System for Mobile Robots
2014
Sensors
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It is then used to rectify the hybrid image pair using the perspective projection model. ...
Based on the hybrid imaging geometry, a generalized stereo approach is developed via the construction of virtual cameras. ...
For central catadioptric cameras with a single viewpoint, the most popular imaging geometry is represented by a two-step projection via a unit sphere [25] . ...
doi:10.3390/s140916508
pmid:25192317
pmcid:PMC4208185
fatcat:pgi5jwhnfvdmjnn66myhhtpxm4
Hybrid homographies and fundamental matrices mixing uncalibrated omnidirectional and conventional cameras
2012
Machine Vision and Applications
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The first and simplest one is designed to deal with para-catadioptric systems, the second one and more complex, considers the combination of a perspective camera and any central catadioptric system. ...
The first is the successful matching between perspective images and hyper-catadioptric images using SIFT descriptors. ...
Svoboda and Pajdla [21] study the epipolar geometry for central catadioptric systems. ...
doi:10.1007/s00138-012-0424-6
fatcat:omvwt3ppubhp3izabtr6dm2wva
Omnidirectional Camera
[chapter]
2014
Computer Vision
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Synonyms -Panoramic camera, spherical camera, catadioptric camera, fisheye camera, wide-angle camera Related Concepts camera calibration pinhole camera radial distortion omnidirectional vision camera parameter ...
(intrinsic, extrinsic) -intrinsic parameter matrix structure from motion epipolar geometry Definition An omnidirectional camera (from omni, meaning all) is a camera with a 360degree field of view in the ...
However, there are projection systems whose geometry cannot be described using the conventional pinhole model because of the very high distortion introduced by the imaging device. ...
doi:10.1007/978-0-387-31439-6_488
fatcat:qe72im7wnrgybh4luuge3nc7pu
A theory of multi-perspective defocusing
2011
CVPR 2011
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We apply our method for predicting defocus blurs on commonly used catadioptric cameras and for reducing defocus blurs in catadioptric projections. ...
Our approach studies how multi-perspective ray geometry transforms under the thin lens. ...
Acknowledgement This project was partially supported by the National Science Foundation under grants IIS-CAREER-0845268 and IIS-RI-1016395, and by the Air Force Office of Scientific Research under the ...
doi:10.1109/cvpr.2011.5995617
dblp:conf/cvpr/DingXY11a
fatcat:xksj7m5atneyzbr5sdudgm7luq
Subpixel Catadioptric Modeling of High Resolution Corneal Reflections
2019
Proceedings of the 14th International Joint Conference on Computer Vision, Imaging and Computer Graphics Theory and Applications
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We present a calibration procedure that achieves a sub-pixel accurate model of the catadioptric imaging system defined by two corneal spheres and a camera. ...
We demonstrate the calibration of the catadioptric system in the context of sparse, feature-based, and dense, pixel-based reconstruction of several 3D scenes from corneal reflections. ...
Figure 3 : 3 Corneal catadioptric imaging system.
Figure 4 : 4 Epipolar geometry of corneal catadioptric system.
Figure 5 : 5 System pipeline overview. ...
doi:10.5220/0007308506730683
dblp:conf/visapp/LinP19
fatcat:vqc6emw3cjad7fiaasonris35e
Scale space for central catadioptric systems: Towards a generic camera feature extractor
2011
2011 International Conference on Computer Vision
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In this paper we propose a new approach to compute the scale space of any omnidirectional image acquired with a central catadioptric system. ...
We perform experiments with synthetic and real images to validate the generalization of our approach to any central catadioptric system. ...
Then this point is projected from the unitary sphere to the image plane through a variable projection point, which is determined by the geometry of the mirror (parameter ξ). ...
doi:10.1109/iccv.2011.6126420
dblp:conf/iccv/PuigG11
fatcat:nrczk52bwjgjfjp5khqlp3puci
Conformal Rectification of Omnidirectional Stereo Pairs
2003
2003 Conference on Computer Vision and Pattern Recognition Workshop
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Such systems consist of a parabolic mirror and an orthographically projecting lens. ...
In this paper we consider the rectification of two omnidirectional cameras, specifically two parabolic catadioptric cameras. ...
The rectification proposed in this paper is motivated by an observation of the geometry induced by such catadiop-tric cameras. It can be shown that the parabolic catadioptric projection is conformal. ...
doi:10.1109/cvprw.2003.10082
dblp:conf/cvpr/GeyerD03
fatcat:4q3pby5mabdwjohhpcaurkadum
An omnidirectional stereoscopic system for mobile robot navigation
2008
2008 International Workshop on Robotic and Sensors Environments
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After justification of the chosen model, a calibration method to obtain the model parameters and the relative pose of the two catadioptric sensors is presented. ...
We first introduce the advantages of a catadioptric stereovision sensor for autonomous navigation and how we have designed it with respect to the Single Viewpoint constraint. ...
Epipolar geometry of catadioptric sensors is more complicated because of the complex shape of the mirror. ...
doi:10.1109/rose.2008.4669195
dblp:conf/rose/BoutteauSEM08
fatcat:w4be5icmevbi7jombrtglnqdsm
Self-calibration of hybrid central catadioptric and perspective cameras
2012
Computer Vision and Image Understanding
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Firstly, with the epipolar geometry between the perspective and rectified catadioptric images, the distortion parameters of the polynomial model can be estimated linearly. ...
Then a new method is proposed to estimate the intrinsic parameters of a central catadioptric camera with the parameters in the polynomial model, and hence the catadioptric cameras can be calibrated. ...
For a central catadioptric camera, we use the rectified image points with Eq. (30) for projective reconstruction. ...
doi:10.1016/j.cviu.2012.02.003
fatcat:lnd4grrilvckrf5ntqrp6vgsvq
New contributions on line-projections in omnidirectional vision
2016
ELCVIA Electronic Letters on Computer Vision and Image Analysis
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This thesis * is focused on the geometry of line projections (line-images) in omnidirectional systems. ...
However, in omnidirectional cameras line projections are distorted by the projection mapping becoming complex curves. ...
The particularization for conical catadioptric systems allows us to recover the geometry of the mirror and the geometry of the 3D line from five points of the line-image. ...
doi:10.5565/rev/elcvia.948
fatcat:d6tqyixbhfapde6enff4zwrdoe
EGT for multiple view geometry and visual servoing - Robotics and vision with pinhole and panoramics cameras
2005
IEEE robotics & automation magazine
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visual information and the geometry between them. ...
Functions provided, for both pinhole and panoramic vision sensors, include camera placement and visualization, computation, estimation of epipolar geometry entities, and many others. ...
In [11] , a unified projection model for central catadioptric camera systems has been proposed. ...
doi:10.1109/mra.2005.1577022
fatcat:i2km2oecwvdwfjow5wjrhme32q
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