Method of tracing contour and a system therefor

Details Method of tracing contour and a system therefor Method of tracing contour and a system therefor

1988-02-10

1990-09-11

Moore, David K.

Image analysis

Histogram processing

For setting a threshold

382 21, 382 26, 382 60, G06K 948

Patent

active

049568698

ABSTRACT:
A system for tracing contour to prepare contour coordinates by tracing contour lines of a figure from an image that consists of a set of a plurality of lines, comprising a memory stored in advance from a basic pattern related to figure contour lines of positions of image transistion points between the neighboring two lines. An image transition point of a line is detected and another image transition point of a line that precedes the above line is detected, too. A pattern of image transistion points of the above two lines is extracted based upon the basic pattern. The thus extracted basic patterns are then integrated and are converted into contour coordinates.

REFERENCES:
patent: 3713098 (1973-01-01), Muenchhausen et al.
patent: 3968475 (1976-07-01), McMahon
Komatsu et al, Apparatus for Encoding Image Data, European Patent Application No. 0164 825, Dec. 18, 1985.
James A Tidd, Photocomposition System Employing Electronic Character Generation from Magnetically Stored Data, Great Britian Application No. 2038598, Jul. 23, 1980.

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