Image thickening processing method and apparatus

Image analysis – Image enhancement or restoration – Object boundary expansion or contraction

Patent

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Details

382195, G06K 942, G06T 520

Patent

active

061545759

ABSTRACT:
In an image thickening processing method, a thickening processing is carried out on a binary image made up of black picture elements and white picture elements, which are adjacent to one another along vertical and horizontal directions. Each of the black picture elements is set as a black picture element of interest. A vertically adjacent picture element, which is adjacent to the black picture element of interest along a single vertical direction, and a horizontally adjacent picture element, which is adjacent to the black picture element of interest along a single horizontal direction, are detected. Also, an obliquely adjacent picture element, which is adjacent to all of the black picture element of interest, the vertically adjacent picture element, and the horizontally adjacent picture element, is detected. Each of the thus detected three adjacent picture elements is set as a black picture element only in cases where each of the thus detected three adjacent picture elements does not belong to a region, which is surrounded by a plurality of black picture elements and is to be recorded as a blank.

REFERENCES:
patent: 5054099 (1991-10-01), Wakabayashi et al.
patent: 5748798 (1998-05-01), Nakai et al.
patent: 5799113 (1998-08-01), Lee
patent: 5887081 (1999-03-01), Bantum

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