000			03451nas|a2200445 i 4500
005			20260818165914.0
008			030926s2002 th u m rtt 00| a1eng d
035			_a.b11900192
099		9	_aAIT Thesis no.TC-02-05
100	0		_aJeerakit Fangtham
245	1	2	_aA new approach to reduce encoding time in EBCOT algorithm for JPEG2000
260			_aBangkok : _bAsian Institute of Technology, _c2002
300			_a65 leaves
490	1		_aThesis ; _vno. TC-02-05
500			_aA thesis submitted in pa1tial fulfillment of the requirements for the degree of Master of Engineering, School of Engineering and Technology
502			_aThesis (M.Eng.) - Asian Institute of Technology, 2002
520			_aThe JPEG2000 is a new image compression standard that provides better performances over the previous standards. One of the major parts of JPEG2000 is EBCOT (Embedded Block Coding with Optimized Truncation) algorithm, which is needed to encode all bitplanes of every codeblock into compressed passes. Then some compressed passes are truncated to achieve a particular desired bit-rate by using rate-distortion optimization. Obviously, there is no need to encode all bitplanes of every codeblock as in JPEG2000. The new algorithm is proposed based on the predefined path scanning method due to the need to reduce encoding time of JPEG2000. The key concept of the proposed algorithm is to encode bandplanes (every codeblock of each subband at arbitrary bitplane) according to the predefined path (significant order of bandplanes) until it reaches the desired bit-rate. And the proposed algorithm continually encodes some bandplanes in order to make more choices for truncation which produces the better quality of compressed image. Then rate-distortion optimization is carried out to truncate some compressed passes in order to achieve the desired bit-rate. The experimental results show that encoding time of the proposed algorithm outperforms JPEG2000, especially at low bit-rate, while PSNR has been maintained at almost the same level. Furthermore, the quality of compressed image and encoding time can be adjusted by the number of extended scanning bandplanes.
650		0	_aJPEG (Image coding standard)
650		0	_aImage compression
650		0	_aCoding theory
700	0		_aTeerapat Sanguankotchakorn, _eChairperson
700	1		_aAhmed, Kazi Mohiuddin, _eExamination Committee
700	1		_aFernando, W.A.C., _eExamination Committee
710	2		_aRoyal Thai Govenunent Fellowship, _eScholarship donor
810	2		_aAsian Institute of Technology. _tThesis ; _vno. TC-02-05
856			_3Full-Text _uhttp://203.159.5.9/ait-thesis/detail.php?q=B07495
907			_a.b11900192 _bmnait _cu
902			_a240329
998			_b0 _c030926 _dm _ea _fu _g2
945			_lmnait
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945			_lmnarc
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909			_aBarcode : 30050120809750 _bCREATED : 2014-10-04 _cRECORD # : i12789392 _dLPATRON : 0 _eLCHKIN : - _f# RENEWALS : 0 _g# OVERDUE : 0 _hIUSE3 : 0 _iTOT CHKOUT : 0 _jTOT RENEW : 0
909			_aBarcode : 30050160045059 _bCREATED : 2016-03-03 _cRECORD # : i12888813 _dLPATRON : 0 _eLCHKIN : - _f# RENEWALS : 0 _g# OVERDUE : 0 _hIUSE3 : 0 _iTOT CHKOUT : 0 _jTOT RENEW : 0
909			_aBarcode : 30050211033567 _bCREATED : 2021-05-05 _cRECORD # : i13344717 _dLPATRON : 0 _eLCHKIN : - _f# RENEWALS : 0 _g# OVERDUE : 0 _hIUSE3 : 0 _iTOT CHKOUT : 0 _jTOT RENEW : 0
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