Title :
A simple underwater video system for laser tracking
Author :
Chen, Hsin-Hung ; Lee, Chia-Ju
Author_Institution :
Inst. of Undersea Technol., Nat. Sun Yat-Sen Univ., Kaohsiung, Taiwan
Abstract :
This paper presents a video system for underwater range finding and target tracking. The method depends on geometrical triangulation using a video camera, a laser diode, and an object plane. This system, which is completely controlled by a personal computer, provides excellent capabilities of efficient calibration and accurate range data processing. Through the calculation of the intensity center of the laser spot, we refine the performance of measurement up to subpixel accuracy. This system employs polynomial interpolation to calibrate the measurement error resulting from geometrical distortion and lens aberrations. The results show that the system can produce excellent accuracy for range finding and target tracking both in air and underwater
Keywords :
CCD image sensors; aberrations; calibration; interpolation; laser ranging; optical tracking; remotely operated vehicles; robot vision; target tracking; underwater vehicles; video cameras; video signal processing; 2D image processing; PC controlled system; accurate range data processing; computer vision; efficient calibration; geometrical distortion; geometrical triangulation; laser diode; laser spot intensity center; laser tracking; lens aberrations; linear CCD; measurement error; object plane; polynomial interpolation; robot vision; simple underwater video system; subpixel accuracy; target tracking; underwater rangefinding; underwater vehicles; video camera; video capture card; Calibration; Cameras; Control systems; Data processing; Diode lasers; Distortion measurement; Laser noise; Microcomputers; Target tracking; Underwater tracking;
Conference_Titel :
OCEANS 2000 MTS/IEEE Conference and Exhibition
Conference_Location :
Providence, RI
Print_ISBN :
0-7803-6551-8
DOI :
10.1109/OCEANS.2000.882160
