Image analysis – Image segmentation – Distinguishing text from other regions
Patent
1994-04-20
1995-11-07
Couso, Yon J.
Image analysis
Image segmentation
Distinguishing text from other regions
382296, 382245, G06K 934
Patent
active
054653045
ABSTRACT:
In a character recognition system, a method and apparatus for segmenting a document image into areas containing text and non-text. Document segmentation in the present invention is comprised generally of the steps of: providing a bit-mapped representation of the document image, extracting run lengths for each scanline from the bit-mapped representation of the document image; constructing rectangles from the run lengths; initially classifying each of the rectangles as either text or non-text; correcting for the skew in the rectangles; merging associated text into one or more text blocks; and logically ordering the text blocks.
REFERENCES:
patent: 4866784 (1989-09-01), Barski
patent: 5191438 (1993-03-01), Katsurada
patent: 5335290 (1994-08-01), Cullen
F. M. Wahl et al. "Block Segmentation and Text Extraction in Mixed Text/Image Documents" IBM Research Laboratory, Computer Graphics and Image Processing, pp. 375-390 (1982).
Cullen John F.
Ejiri Koichi
Couso Yon J.
Ricoh & Company, Ltd.
Ricoh Corporation
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