Facsimile signal processing for Chinese characters

F. K. Lam, Chi Kin Leung, S. T. Chow

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review


A facsimile (FAX) signal processing system designed for filtering documents with printed Chinese characters is described. Filtering algorithms are applied to remove noise corrupting the image scanned by the FAX machine and to preserve the edges. A total of six filtering algorithms have been chosen for investigation, namely, weighted average filter, separable median filter, median with checking filter, Lee's filter, gradient inverse filter, and rotating variance filter. Documents containing Chinese characters are scanned and then stored in the RAM of a personal computer. Random noise is then added, and filtering performed. Experimental results show that all of the six algorithms are capable of removing some of the noise. However, the median filter demonstrated the best noise-removing and edge-preserving capabilities, speed of operation, and ease of implementation for both small- and large-size Chinese characters.
Original languageEnglish
Title of host publication90 IEEE Reg 10 Conf Comput Commun Syst IEEE TENCON 91
PublisherPubl by IEEE
Number of pages5
ISBN (Print)0879425563
Publication statusPublished - 1 Jan 1991
Externally publishedYes
Event1990 IEEE Region 10 Conference on Computer and Communication Systems - IEEE TENCON '90 - , Hong Kong
Duration: 24 Sep 199027 Sep 1990


Conference1990 IEEE Region 10 Conference on Computer and Communication Systems - IEEE TENCON '90
Country/TerritoryHong Kong

ASJC Scopus subject areas

  • Engineering(all)

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