Image processing apparatus having image region designating funct

Details Image processing apparatus having image region designating funct Image processing apparatus having image region designating funct

1996-01-30

1997-11-18

Vu, Kim

Image analysis

Image segmentation

Distinguishing text from other regions

358462, 358452, 358453, 358447, 358463, 358465, 382173, 382176, 382199, 382258, 382266, 382254, 382270, H04N 140, H04N 138, H04N 1387, G06K 934

Patent

active

056895828

ABSTRACT:
When a frame marked with a marker pen in a black-and-white image is to be extracted, an intermediate-density portion present on a character edge portion is removed by a frame extracting circuit. The frame extracting circuit removes an intermediate-density pixel adjacent to a high-density pixel corresponding to a character/figure. Accordingly, the extracting precision of the marker portion in the black-and-white image is improved. The extracting precision of the marker portion will not be decreased even when extraction is to be performed from an image enlarged by an input system.

REFERENCES:
patent: 4853970 (1989-08-01), Ott et al.
patent: 4893188 (1990-01-01), Murakami et al.
patent: 5257116 (1993-10-01), Suzuki
patent: 5363210 (1994-11-01), Sasaki et al.
patent: 5488673 (1996-01-01), Katayama et al.
patent: 5532828 (1996-07-01), Mitsuse
patent: 5568571 (1996-10-01), Willis et al.
08/209,196, Mar. 10, 1994, Yamanishi, 382 317.

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