Block adaptive binarization of business card images in PDA using modified quadratic filter

KI TAEG, SHIN ; ICK HOON, JANG ; et al.

In: Document recognition and retrieval XI (San Jose CA, 21-22 January 2004)SPIE proceedings series 5296:92-101

Konferenz - print; 10; 11 ref

In this paper, we propose a block adaptive binarization (BAB) using a modified quadratic filter (MQF) to binarize business card images of ill conditions acquired by personal digital assistant (PDA) cameras. In the proposed method, a business card image is first partitioned into blocks of 8x8 and the blocks are then classified into character blocks (CBs) and background blocks (BBs) for locally adaptive processing. Each CB is windowed with 24x24 rectangular window centering around the CB and the windowed blocks are improved by the preprocessing filter MQF, in which the scheme of threshold selection in QF is modified. The 8x8 center block of the improved block is binarized with the threshold. A binary image is obtained tiling each binarized block in its original position. Experimental results show that the quality of binary images obtained by the proposed method is much better than that by the conventional global binarization (GB) using QF. In addition, the proposed method yields about 43% improvement of character recognition rate over the GB using QF.

Titel:	Block adaptive binarization of business card images in PDA using modified quadratic filter
Autor/in / Beteiligte Person:	KI TAEG, SHIN ; ICK HOON, JANG ; NAM CHUL, KIM ; CHONG HEUN, KIM ; TAE SIK, KIM ; Barney Smith, Elisa H ; Hu, Jianying ; Allan, James ; Document recognition and retrieval. Conference(11 ; San Jose CA, ; 2003-01-21) ; International Society for Optical Engineering
Link:	View record from FRANCIS Archive
Quelle:	Document recognition and retrieval XI (San Jose CA, 21-22 January 2004)SPIE proceedings series 5296:92-101
Veröffentlichung:	Bellingham WA: SPIE, 2004
Medientyp:	Konferenz
Umfang:	print; 10; 11 ref
ISBN:	978-0-8194-5199-6 (print) ; 0-8194-5199-1 (print)
Schlagwort:	Assistant numérique personnel Personal digital assistant Auxiliar personal digital Code bloc Block code Código bloque Filtre non linéaire Non linear filter Filtro no lineal Image binaire Binary image Imagen binaria Méthode adaptative Adaptive method Método adaptativo Pavage Tiling Qualité image Image quality Calidad imagen Recherche information Information retrieval Búsqueda información Reconnaissance caractère Character recognition Reconocimiento carácter Reconnaissance forme Pattern recognition Reconocimiento patrón Traitement image Image processing Procesamiento imagen Sciences exactes et technologie Exact sciences and technology Sciences appliquees Applied sciences Informatique automatique theorique systemes Computer science control theory systems Intelligence artificielle Artificial intelligence Reconnaissance des formes. Traitement numérique des images. Géométrie algorithmique Pattern recognition. Digital image processing. Computational geometry Documentation Electronics Electronique Optics Optique Physics Physique Telecommunications Télécommunications
Sonstiges:	Nachgewiesen in: FRANCIS Archive Sprachen: English Original Material: INIST-CNRS Document Type: Conference Paper File Description: text Language: English Author Affiliations: Dept. of Electronic Engineering, Kyungpook National Univ., Daegu 702-701, Korea, Republic of ; Dept. of Electronic Engineering, Kyungwoon Univ., Gumi 730-850, Korea, Republic of Rights: Copyright 2004 INIST-CNRS ; CC BY 4.0 ; Sauf mention contraire ci-dessus, le contenu de cette notice bibliographique peut être utilisé dans le cadre d’une licence CC BY 4.0 Inist-CNRS / Unless otherwise stated above, the content of this bibliographic record may be used under a CC BY 4.0 licence by Inist-CNRS / A menos que se haya señalado antes, el contenido de este registro bibliográfico puede ser utilizado al amparo de una licencia CC BY 4.0 Inist-CNRS

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