000			03023cam a2200397 i 4500
005			20260817162505.0
008			241198s1992 th r 0000|00eng d
035			_a.b10082906
099		9	_aAIT Thesis no.GT-91-36
100	0		_aViroat Srisurapanon
245	1	0	_aAnalysis of traffic data using the image processing approach
260			_aBangkok : _bAsian Institute of Technology, _c1992
300			_a131 p. : _bill.
490	1		_aThesis ; _vno. GT-91-36
502			_aThesis (M.Eng.) - Asian Institute of Technology
500			_aA thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Engineering and Technology
520			_aThis research concentrates on traffic data collection , headway, vehicle speed, lane changing and vehicle classification by video recording using image processing to extract these data automatically. This developed algorithm is applicable to moving vehicles. The overall procedure is separated into two major parts: image extraction and traffic characteristics extraction. The former employed the interframe technique modified from Vieren ' s method (1991 ) to obtain a binary image. The latter part is developed to extract traffic data from the former procedure. Two detection lines are set across a lane to detect brightness along the lines and data from these two lines were matched by the developed algorithm . Thanks to grouping and group matching techniques in this part , they can reduce many errors before finding the vehicle speeds . The result is good for speed study on expressway in Bangkok, the error of average travel speed about ±3 % while comparing with manual extraction. This algorithm was implemented as nonreal time. Time required by a personal computer to process a sequence of images was 25 times slower than real time. The detection rate is 5 frames per second by this machine, which can cause misdetecting. However, a grouping technique and a matching technique are proposed to reduce the error satisfactorily.
650		0	_aTraffic flow
650		0	_aImage processing
700	1		_aMori, Hiroshi, _eChairperson
700	0		_aYordphol Tanaboriboon, _eExamination committee
700	1		_aShimazaki, Toshikazu, _eExamination committee
710	2		_aAustralian Government, _eScholarship donor
810	2		_aAsian Institute of Technology. _tThesis ; _vno. GT-91-36
856			_3Full-Text _uhttp://203.159.5.9/ait-thesis/detail.php?q=B16918
907			_a.b10082906 _bmnait _cs
902			_a240410
998			_b2 _c951012 _dm _ea _fs _g0
945			_lmnait
945			_lmnarc
942			_c22
942			_c40
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