Graphic display area classification

Details Graphic display area classification Graphic display area classification

1980-03-19

1983-01-11

Waring, Alvin H.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340720, G06K 920

Patent

active

043684637

ABSTRACT:
A method and apparatus are provided for classifying areas on a raster-type display unit. The problem is to identify areas defined by a closed boundary--e.g. for filling in such areas. Boundary data are entered into a first "polygon" store which has a plurality of memory locations each corresponding to a respective dot position of the display field, and at least one seed point is identified. Each dot position is then examined to see whether there exists a connected path, not including a boundary position, from it to a seed point, and if there is, this fact is recorded. The criterion for deciding whether or not a path is connected depends on the definition of what constitutes a closed boundary.

REFERENCES:
patent: 3701988 (1972-10-01), Allaart
patent: 3902160 (1975-08-01), Kawa
patent: 3967241 (1976-06-01), Kawa
patent: 4205389 (1980-05-01), Heartz
Article "A Parallel Picture Processing Machine" by Bjorn Kruse from IEEE Transactions on Computers, vol. C-22, No. 12, Dec. 1973, pp. 1075-1087.
Article "Taschenbuch der Informatik" by K. Steinbuch and W. Weber, Spring-Verlag, 1974, pp. 466-479.
"Digital Pattern Recognition", Edited by K. S. Fu, Spring-Verlag, 1976, pp. 162-163.

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