Modeling and calibration of automated zoom lenses
Modeling and calibration of automated zoom lenses
Self-Calibration of Stationary Cameras
International Journal of Computer Vision
International Journal of Computer Vision
Multiple view geometry in computer visiond
Multiple view geometry in computer visiond
Scalable Extrinsic Calibration of Omni-Directional Image Networks
International Journal of Computer Vision
True Multi-Image Alignment and its Application to Mosaicing and Lens Distortion Correction
CVPR '97 Proceedings of the 1997 Conference on Computer Vision and Pattern Recognition (CVPR '97)
Violating Rotating Camera Geometry: The Effect of Radial Distortion on Self-Calibration
ICPR '00 Proceedings of the International Conference on Pattern Recognition - Volume 1
Calibrating pan-tilt cameras in wide-area surveillance networks
ICCV '03 Proceedings of the Ninth IEEE International Conference on Computer Vision - Volume 2
ICCV '03 Proceedings of the Ninth IEEE International Conference on Computer Vision - Volume 2
Practical Pan-Tilt-Zoom-Focus Camera Calibration for Augmented Reality
ICVS '09 Proceedings of the 7th International Conference on Computer Vision Systems: Computer Vision Systems
PTZ camera calibration for augmented virtual environments
ICME'09 Proceedings of the 2009 IEEE international conference on Multimedia and Expo
Sparse non-linear least squares optimization for geometric vision
ECCV'10 Proceedings of the 11th European conference on Computer vision: Part II
PTZ camera modeling and panoramic view generation via focal plane mapping
ACCV'10 Proceedings of the 10th Asian conference on Computer vision - Volume Part II
Self-localizing smart camera networks
ACM Transactions on Sensor Networks (TOSN)
Self-calibration of hybrid central catadioptric and perspective cameras
Computer Vision and Image Understanding
Towards unsupervised semantic segmentation of street scenes from motion cues
Proceedings of the 27th Conference on Image and Vision Computing New Zealand
Self-calibration of a PTZ camera using new LMI constraints
ACCV'12 Proceedings of the 11th Asian conference on Computer Vision - Volume Part IV
Cooperative augmentation of mobile smart objects with projected displays
ACM Transactions on Interactive Intelligent Systems (TiiS) - Special issue on interaction with smart objects, Special section on eye gaze and conversation
Automatic unconstrained online configuration of a master-slave camera system
ICVS'13 Proceedings of the 9th international conference on Computer Vision Systems
Hi-index | 0.00 |
In this paper, we discuss the problem of estimating parameters of a calibration model for active pan-tilt-zoom cameras. The variation of the intrinsic parameters of each camera over its full range of zoom settings is estimated through a two step procedure. We first determine the intrinsic parameters at the camera's lowest zoom setting very accurately by capturing an extended panorama. The camera intrinsics and radial distortion parameters are then determined at discrete steps in a monotonically increasing zoom sequence that spans the full zoom range of the camera. Our model incorporates the variation of radial distortion with camera zoom. Both calibration phases are fully automatic and do not assume any knowledge of the scene structure. High-resolution calibrated panoramic mosaics are also computed during this process. These fully calibrated panoramas are represented as multi-resolution pyramids of cube-maps. We describe a hierarchical approach for building multiple levels of detail in panoramas, by aligning hundreds of images captured within a 1-12× zoom range. Results are shown from datasets captured from two types of pan-tilt-zoom cameras placed in an uncontrolled outdoor environment. The estimated camera intrinsics model along with the cube-maps provides a calibration reference for images captured on the fly by the active pan-tilt-zoom camera under operation making our approach promising for active camera network calibration.