Document image processing method and system having function of d

Details Document image processing method and system having function of d Document image processing method and system having function of d

1995-08-18

1998-06-30

Boudreau, Leo H.

Image analysis

Image segmentation

Distinguishing text from other regions

382224, 382317, G06K 934

Patent

active

057745803

ABSTRACT:
An extracting step extracts text regions from an input document image. A classifying step classifies the text regions into in-order reading regions to be successively read in the predetermined order and different-attribute regions. A detecting step detects the construction of the in-order reading regions. A determining step determines the reading order, in which the in-order reading regions are to be read, using the construction. The detecting step detects the construction in a manner that is the same whether the input document image comprises a vertically typeset document or a horizontally typeset document. The detecting step further includes a tree graph formation step c-1) forming a tree graph representing the construction including nodes respectively representing the in-order reading regions.

REFERENCES:
patent: 4856074 (1989-08-01), Nagaoko
patent: 5048109 (1991-09-01), Bloomberg et al.
patent: 5073953 (1991-12-01), Westdijk
patent: 5119437 (1992-06-01), Kuwamura et al.
patent: 5185813 (1993-02-01), Tsujimoto
patent: 5278918 (1994-01-01), Bernzott et al.
patent: 5369716 (1994-11-01), Sangu
1993 IEEE article Block Segmention and Text Area Examination of Vertical/Horizontal Written Document, written by Naohiro Amamoto, Shin Torigoe, and Yoshitaka Hirogaki, pp. 739-742.
The Japanese book Information Processing Handbook first published on May 1989, edited by the Information Processing Society, published by Ohm, p. 26, FIG.1.9 Tree Tracing method, (a) Preorder.

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