Title :
Research on high resolution & high sensitivity panoramic surveillance system
Author :
Zhenhai Zhang ; Kejie Li ; Bo Hu ; Bo Pu ; Jiyang Li ; Zijie Jiang ; Mengying Liu ; Tao Li ; Xudong Liu
Author_Institution :
Sch. of Mechatron. Eng., Beijing Inst. of Technol., Beijing, China
Abstract :
Catadioptric panoramic vision systems have been widely used in many fields because of their advantages such as a wide field of view, integrated imaging, and rotational symmetry. They also play a very important role in the monitoring of unmanned platforms. However, the resolution of catadioptric panoramic vision systems is not very high, usually less than 5 million pixels at present. Even if the resolution is greater than 5 million pixels, the unwrapping and rectification of these images is carried out off-line. Further, the systems are also deployed in a stationary or near-stationary state. This paper proposes an unwrapping and rectification method for a high-resolution catadioptric panoramic vision system that can be used while moving. It can segment dynamic circular mark regions from panoramic videos accurately, determine the center coordinates of circular images in real time, eliminate the processing of unwanted video regions, and shorten the image processing time. In addition, the center coordinates and radius of the circular mark regions are obtained simultaneously so that the image distortion caused by inaccurate center coordinates is reduced. The method uses radial and decentering distortion parameters and a correction factor for fitting a polynomial to rectify the panoramic video without distortion.
Keywords :
image resolution; polynomials; surveillance; video signal processing; catadioptric panoramic vision systems; center coordinates; circular images; correction factor; distortion parameters; dynamic circular mark regions; image distortion; image processing time; integrated imaging; near-stationary state; panoramic surveillance system; panoramic videos; polynomial fitting; rectification method; rotational symmetry; unmanned platforms; unwanted video regions; unwrapping method; Approximation algorithms; Cameras; Charge coupled devices; Image resolution; Image segmentation; Lenses; Machine vision;
Conference_Titel :
Advanced Video and Signal Based Surveillance (AVSS), 2014 11th IEEE International Conference on
Conference_Location :
Seoul
DOI :
10.1109/AVSS.2014.6918660