Segmentation of text, picture and lines of a document image

Details Segmentation of text, picture and lines of a document image Segmentation of text, picture and lines of a document image

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).

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