Background area extraction in document layout analysis

Image analysis – Image segmentation

Reexamination Certificate

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C382S203000, C358S464000

Reexamination Certificate

active

07616813

ABSTRACT:
An apparatus, method, system, computer program and product, each capable of extracting a background area of a document image. The background area of the document image may be extracted by repeating recursively the acts of: extracting a set of white rectangles from a processed area of the document image; dividing the processed area into a plurality of segments using the set of white rectangles as a separator; storing the plurality of segments; and reading the plurality of segments in a predetermined order as a processed area.

REFERENCES:
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patent: 5555362 (1996-09-01), Yamashita et al.
patent: 5647021 (1997-07-01), Baird et al.
patent: 5699453 (1997-12-01), Ozaki
patent: 6798895 (2004-09-01), Takahashi
patent: 7317833 (2008-01-01), Kaneda
patent: 11-250041 (1999-09-01), None
patent: 2000-67158 (2000-03-01), None
patent: 2000-113103 (2000-04-01), None
Henry S. Baird, “Background Structure in Document Images” in H. Bunke, P.S.P. Wang, and H.S. Baird, Eds., Document Image Analysis, World Scientific, Singapore, pp. 17-34, 1994.
T.M. Breuel, “Two Geometric Algorithms for Layout Analysis” In Proceedings of IAPR Workshop on Document Analysis Systems, Princeton, NJ, USA, pp. 1-12, 2002.

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