Results 311 to 320 of about 918,039 (380)

Visual Servo Application Using Model Predictive Control (MPC) Method on Pan-tilt Camera Platform

International Conference on Agents, 2019
Visual servoing is a technique which use feedback information extracted from a visual sensor to control the motion of a robot. Combined with an image processing algorithm, visual information from a camera becomes a visual sensor which provides feedback ...
Christ Freben Dommaris Saragih, F. M. Kinasih, C. Machbub, P. Rusmin, A. S. Rohman   +4 more
semanticscholar   +1 more source

Integrated Visual Servoing Solution to Quadrotor Stabilization and Attitude Estimation Using a Pan and Tilt Camera

IEEE Transactions on Control Systems Technology, 2019
This paper presents an integrated visual servoing solution to the problem of quadrotor attitude estimation and stabilization based solely on image feedback from a pan and tilt camera and biased rate gyros.
David Cabecinhas, Sérgio Brás, R. Cunha, C. Silvestre, P. Oliveira   +4 more
semanticscholar   +1 more source

Cone beam SPECT reconstruction with camera tilt

Physics in Medicine and Biology, 1989
The authors modified the cone beam filtered backprojection algorithm of L.A. Feldkamp et al. (1984) and applied it to the symmetric tilt-angle case. Both the modifications of the algorithm and a single preliminary test are reported.
Kim L. Greer, S H Manglos, Ronald J. Jaszczak   +2 more
openaire   +3 more sources

Automatic Pan–Tilt Camera Control for Learning Dirichlet Process Gaussian Process (DPGP) Mixture Models of Multiple Moving Targets

IEEE Transactions on Automatic Control, 2019
Information value functions based on the Kullback–Leibler (KL) divergence have been shown the most effective for planning sensor measurements by means of greedy strategies.
Hongchuan Wei, Pingping Zhu, Miao Liu, J. How, S. Ferrari   +4 more
semanticscholar   +1 more source

Cascaded Control Design for a Stabilized Pan-Tilt Camera Platform on a Quadrotor UAV

Cyber .., 2018
This paper presents a new cascaded control design for a pan-tilt camera platform. The camera platform can be mounted on a quadrotor unmanned aerial vehicle (UAV) to achieve a fixed target or moving target detection and tracking.
Baolu Liu, Jianchuan Guo, Jiahui Rong, Baoquan Li   +3 more
semanticscholar   +1 more source

Keeping a Pan-Tilt-Zoom Camera Calibrated

IEEE Transactions on Pattern Analysis and Machine Intelligence, 2013
Pan-tilt-zoom (PTZ) cameras are pervasive in modern surveillance systems. However, we demonstrate that the (pan, tilt) coordinates reported by PTZ cameras become inaccurate after many hours of operation, endangering tracking and 3D localization algorithms that rely on the accuracy of such values. To solve this problem, we propose a complete model for a
Richard J. Radke, Ziyan Wu
openaire   +2 more sources

Stereoscopic System with the Tight Tilted Cameras

Applied Mechanics and Materials, 2013
Thispaper describes a stereoscopic camera system based on a pair of separate cameras.The cameras are stationary and tilted together. The value of their tiltingangle is derived in regards to their maximal possible utilization of the chiparea with the minimalizing unused parts. It can increase the size of the croppedimage of both left and right images as
Tomáš Kot, Petr Novac, Václav Krys, Vladimír Mostýn   +3 more
openaire   +2 more sources

Method for pan-tilt camera calibration using single control point.

Journal of The Optical Society of America A-optics Image Science and Vision, 2015
The pan-tilt (PT) camera is widely used in video surveillance systems due to its rotatable property and low cost. The rough output of a PT camera may not satisfy the demand of practical applications; hence an accurate calibration method of a PT camera is
Yunting Li, Jun Zhang, Wenwen Hu, J. Tian   +3 more
semanticscholar   +1 more source

Neural Background Subtraction for Pan-Tilt-Zoom Cameras

IEEE Transactions on Systems, Man, and Cybernetics: Systems, 2014
We propose an extension of a neural-based background subtraction approach to moving object detection to the case of image sequences taken from pan-tilt-zoom (PTZ) cameras. The background model automatically adapts in a self-organizing way to changes in the scene background.
FERONE, Alessio, MADDALENA, LUCIA
openaire   +3 more sources

Active camera calibration using pan, tilt and roll

Proceedings of 1995 IEEE International Conference on Robotics and Automation, 1997
Three dimensional vision applications, such as robot vision, require modeling of the relationship between the two-dimensional images and the three-dimensional world. Camera calibration is a process which accurately models this relationship. The calibration procedure determines the geometric parameters of the camera, such as focal length and center of ...
Anup Basu, K. Ravi
openaire   +3 more sources