Method and apparatus for detecting a closed-loop area of an imag

Details Method and apparatus for detecting a closed-loop area of an imag Method and apparatus for detecting a closed-loop area of an imag

1993-05-26

1995-08-22

Reinhart, Mark J.

Facsimile and static presentation processing

Facsimile

Recording apparatus

H04N 121

Patent

active

054445434

ABSTRACT:
A closed-loop area detecting method includes the steps of: reading a dot matrix from bi-level image data, the dot matrix comprising a target dot and two or more contiguous dots contiguous to the target dot; performing a first pattern matching to detect whether a dot matrix coincides with one of a plurality of first patterns so as to set a first flag for each dot; performing a second pattern matching to detect whether a dot matrix coincides with one of a plurality of second patterns so as to set a second flag for each dot; repeating the above mentioned first and second flag setting so that the second flags for all the dots of the image data are set; and detecting a dot of the image data as lying in the inside of a closed-loop area when the second flag is set to a first value, and detecting a dot of the image data as lying on the outside of the closed-loop area when the second flag is set to a second value. An image processing apparatus utilizing the closed-loop area detecting method is also provided.

REFERENCES:
patent: 4912487 (1990-03-01), Porter et al.

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