Apparatus for distinguishing image portions through image expans

Details Apparatus for distinguishing image portions through image expans Apparatus for distinguishing image portions through image expans

1995-12-11

1996-12-10

Barlow, Jr., John E.

Facsimile and static presentation processing

Facsimile

Recording apparatus

382268, 382269, H04N 121

Patent

active

055836461

ABSTRACT:
An image processing apparatus for performing predetermined processing on an image of a document having a character/line portion, a gradation portion and a background portion. The apparatus reads the document image, converts image densities to binary pixel data, and expands the black pixels in the vertical and horizontal directions. Using this expanded image, character/line, gradation and background portions can be accurately distinguished from each other.

REFERENCES:
patent: 4667250 (1987-05-01), Murai
patent: 5195175 (1993-03-01), Kamno et al.
patent: 5331442 (1994-07-01), Sorimachi
Takashi Saitoh and Theo Pavlidis, "Page Segmentation without Rectangle Assumption", 1992 IEEE, vol. II, Conference B, pp. 277-280.

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