A Description Method of Digital Contour Line Using Three Directional Differences

Takeshi AGUI  Masayuki NAKAJIMA  Yukihiro ARAI  

IEICE TRANSACTIONS (1976-1990)   Vol.E63   No.6   pp.439-440
Publication Date: 1980/06/25
Online ISSN: 
Print ISSN: 0000-0000
Type of Manuscript: LETTER
Category: Data Processing

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Based on appearing frequencies of directional changes in contour line tracing, a chain coding method using three directional differences is described. Smoothed contour lines and 2-3 bit-compression compared with Freeman's chain code are obtained applying the method on 20 contour lines of lakes.