Block Adaptive Binarization of Business Card Images Acquired in PDA Using a Modified Quadratic Filter 


Vol. 29,  No. 6, pp. 801-814, Jun.  2004


PDF
  Abstract

In this paper, we propose a block adaptive binarization (BAB) using a modified quadratic filter (MQF) to binarize business cad image acquired by personal digital assistant (PDA) cameras effectively. In the proposed method, a business card image is first partitioned into blocks of 8×8 and the blocks are then classified into character blocks (CBs) and background blocks (BBs). Each classified CB is windowed with a 24×24 rectangular window centering around the CB and the windowed blocks are improved by the pre-processing filter MQF, in which the scheme of threshold selection in QF is modified. The 8×8 center block of the improved block is binarized with the threshold selected in the MQF. A binary image is obtained tiling each binarized block in its original position. Experimental results show that the MQF and the BAB have much better effects on the performance of binarization compared to the QF and the global binarization (GB), respectively, for the test business card images acquired in a PDA. Also the proposed BAB using MQF gives binary images of much better quality, in which the characters appear much better clearly, over the conventional OB using QF. In addition, the binary images by the proposed BAB using MQF yields about 87.7% of character recognition rate so that about 32.0% performance improvement over those by the OB using QF yielding about 55.7% of character recognition rate using a commercial character recognition software.

  Statistics
Cumulative Counts from November, 2022
Multiple requests among the same browser session are counted as one view. If you mouse over a chart, the values of data points will be shown.


  Cite this article

[IEEE Style]

K. Shin, I. Jang, N. Kim, "Block Adaptive Binarization of Business Card Images Acquired in PDA Using a Modified Quadratic Filter," The Journal of Korean Institute of Communications and Information Sciences, vol. 29, no. 6, pp. 801-814, 2004. DOI: .

[ACM Style]

Ki-Taeg Shin, Ick-Hoon Jang, and Nam-Chul Kim. 2004. Block Adaptive Binarization of Business Card Images Acquired in PDA Using a Modified Quadratic Filter. The Journal of Korean Institute of Communications and Information Sciences, 29, 6, (2004), 801-814. DOI: .

[KICS Style]

Ki-Taeg Shin, Ick-Hoon Jang, Nam-Chul Kim, "Block Adaptive Binarization of Business Card Images Acquired in PDA Using a Modified Quadratic Filter," The Journal of Korean Institute of Communications and Information Sciences, vol. 29, no. 6, pp. 801-814, 6. 2004.

Search
(IN TITLE, AUTHOR, ABSTRACT,KEYWORDS)

Advanced Search ▼

POPULAR KEYWORDS
(TOP 10 KEYWORDS)

Recent Publications
(LAST 3 YEARS)






pISSN : 1226 - 4717
eISSN : 2287 - 3880