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Description of Gray Level Picture Using a Collection of Density Contour Lines
Takeshi AGUI Masayuki NAKAJIMA Kiyotaka MATSUBARA
IEICE TRANSACTIONS (1976-1990)
Publication Date: 1982/01/25
Print ISSN: 0000-0000
Type of Manuscript: PAPER
Category: Data Processing
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An extraction method of density contour lines of gray level pictures is described. Two kinds of quads composed of four image pixels and non-image pixels are defined for making the density contour lines simple closed paths. From the resultant density contour lines of simple closed paths, a tree graph is made for executing the recognition of a house included in a monochromatic aerial photo of an urban area.