Code pattern-image processing apparatus

Details Code pattern-image processing apparatus Code pattern-image processing apparatus

1996-04-03

1998-11-10

Chang, Jon

Image analysis

Image segmentation

382203, G06K 934

Patent

active

058356290

ABSTRACT:
A code-pattern processing apparatus wherein a streak processor extracts a binary data string as a streak constituting a part of a marker only when the run length in the raster direction of input binary image data is within a predetermined range. An adjacency determination unit and Xmin and Xmax comparators compare the streak with attribute data of the immediately preceding line supplied from an attribute data memory. An attribute data generator generates attribute data corresponding to the comparison result. This attribute data is newly written or overwritten on old data in the attribute data memory. If it is determined that there is no streak of a line of interest and attribute data of the immediately preceding line is present, a circumscribed quadrilateral extraction unit outputs the values of the attribute data of the immediately preceding line as the coordinate values of a circumscribed quadrilateral.

REFERENCES:
patent: 5101448 (1992-03-01), Kawachiya et al.
patent: 5129012 (1992-07-01), Abe
patent: 5335290 (1994-08-01), Cullen et al.
patent: 5555556 (1996-09-01), Ozaki
patent: 5592574 (1997-01-01), Chilton et al.

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