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001-es BibID:	BIBFORM043120
Első szerző:	Fazekas Attila (matematikus, informatikus)
Cím:	An algorithm using Walsh transformation for compressing typeset documents / Attila Fazekas, András Hajdu
Dátum:	1999
Megjegyzések:	In this paper the authors present an algorithm which can be used for compressing text documents, principally. The algorithm allows some loss of infor- mation, but the original digital image is compressed in a rather e±cient way, so the result compressed data structure is suitable to be transmitted through some kind of telecommunication channel. The original document is assumed not to contain sophis- ticated typographical details, but text, and some simple graphics. The compression algorithm tries to recognize the text parts of the document and the result of a char- acter recognition process is stored, instead of the graphic representation of the text. This character recognition part is based on Walsh transformation. The algorithm was tested in several cases, and proved itself to be pretty e±cient and reliable for simple documents.
Tárgyszavak:	Természettudományok Matematika- és számítástudományok idegen nyelvű folyóiratközlemény hazai lapban
Megjelenés:	Acta Mathematica Academiae Paedagogicae Nyíregyháziensis. - 15 (1999), p. 61-68. -
További szerzők:	Hajdu András (1973-) (matematikus, informatikus)
Internet cím:	Intézményi repozitóriumban (DEA) tárolt változat
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001-es BibID:	BIBFORM038891
Első szerző:	Fazekas Attila (matematikus, informatikus)
Cím:	Fingerprint identification based on dermatological features / A. Fazekas, G. Fazekas
Dátum:	2002
Megjegyzések:	One of the long-standing problems of practice is the personal identification, namely ascertaining personal identification. Several methods have been adapted for solving this problem during history, from seal ring, through signature to photo. Fingerprint, as a possibility for identification is widely known from the last century. From the sixties when computers became widely used, the possibility of computerizing of identification was brought up.In this paper we explain a fingerprint identifying system used in automatic personal identifying systems. The identification is based on dermatological characteristics, namely the unique pattern of ridges of fingers. Usually two levels of pattern are distinguished, global and local patterns In this system we improved both the global and the local characteristics using a identification. We use the direction matrix representing orientation of ridges as global characteristics and the method of identification of bifurcations as local characteristics.
Tárgyszavak:	Műszaki tudományok Informatikai tudományok idegen nyelvű folyóiratközlemény hazai lapban
Megjelenés:	Acta Mathematica Academiae Paedagogicae Nyíregyháziensis. - 18 (2002), p. 85-94. -
További szerzők:	Fazekas Gábor (1952-) (informatikus, matematikus)
Internet cím:	Szerző által megadott URL Intézményi repozitóriumban (DEA) tárolt változat
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