System and method for automatically distinguishing between graph

Details System and method for automatically distinguishing between graph System and method for automatically distinguishing between graph

1991-12-30

1994-12-20

Beausoliel, Jr., Robert W.

G06F 1562

Patent

active

053751973

ABSTRACT:
A system for automatically distinguishing between graphic information and text information of image data, comprising a buffering circuit for storing image data from an A/D converter by an address from an address generator or outputting the stored image data to a data bus by an address from a microprocessor under a control of the microprocessor. Also, according to the present invention, there is provided a method for automatically distinguishing between graphic information and text information of image data, comprising the steps of converting an analog image signal from a scanner into digital image data and storing the digital image data by the line unit, reading the stored image data by the four line unit, subdividing the read image data into contiguous image data blocks and evaluating a block average, evaluating a background color illumination utilizing the evaluated block average, setting a distinguishing unit as windows each of which includes a predetermined number of contiguous blocks and distinguishing between a text portion and a graphic portion of the image data by the window unit, correcting an incorrectly distinguished window, performing an alignment of the edges of graphic/text portions, and correcting the delay of the real time and completing the distinction between graphic/text portions.

REFERENCES:
patent: 4149091 (1979-04-01), Crean et al.
patent: 4577235 (1986-03-01), Kannapell et al.
patent: 4589144 (1986-05-01), Namba
patent: 4953230 (1990-08-01), Kurose
1988 International Display Research Conference, 4 Oct. 1988, San Diego, Calif., pp. 146-151; Tomikawa: "An Identification of Pseudo Continuous Tone by Labeling".

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