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Patent Searching and Data


Title:
DOCUMENT RECOGNIZING DEVICE
Document Type and Number:
Japanese Patent JPH0721309
Kind Code:
A
Abstract:

PURPOSE: To provide a document recognizing device which can correctly recognize a graphic that includes plural horizontal and vertical lines crossing to each other with high recognizing reliability.

CONSTITUTION: A document recognizing device is provided with a circumscribed rectangle detecting part 3, a ruled line rectangle extracting part 4 which extracts a circumscribed rectangle having its vertical/horizontal length ratio larger than the threshold value as a ruled line rectangle, a character rectangle extracting part 5 which extracts a circumscribed rectangle having its shorter side length smaller than the threshold value as a character rectangle, and a graphic rectangle extracting part 6 which extracts the vertical and horizontal lines out of a circumscribed rectangle and then extracts a graphic rectangle based on the number of extracted vertical and horizontal lines and the intersecting points among these lines. Furthermore a graphic/table rectangle deciding part 8 is added to recognize a graphic or table rectangle based on the ratio between the total number of black picture elements included in a circumscribed rectangle and the number of black picture elements connected to the black picture elements inscribed to the circumscribed rectangle, together with an area extracting part 10 which extracts the areas out of the binary image data based on the rectangle information, and a recognizing part 11 which recognizes the binary image data based on the attribute of each area.


Inventors:
IKEMURE YUMIKO
Application Number:
JP1993000162108
Publication Date:
January 24, 1995
Filing Date:
June 30, 1993
Export Citation:
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Assignee:
MATSUSHITA ELECTRIC IND CO LTD
International Classes:
G06K9/20; (IPC1-7): G06K9/20
Attorney, Agent or Firm:
小鍜治 明 (外2名)