Image processing apparatus and method

Details Image processing apparatus and method Image processing apparatus and method

1995-12-20

1999-05-04

Coles, Edward L.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358447, 358462, 382197, H04N 140, G06K 948

Patent

active

059009489

ABSTRACT:
There are provided an image processing apparatus and method, which are excellent in speed, quality, and memory amount by appropriately switching a portion to be subjected to extraction of outline vector data and a portion not to be subjected to such extraction on the basis of an input binary image.
For example, whether an input binary image is a character/line image region or a pseudo halftone image region is roughly discriminated in units of predetermined amounts. Only image data determined as character/line image regions is extracted, and outline vector data are extracted from the extracted image data. The extracted outline vector data are stored in a memory. The amount of data stored in the memory is monitored, and when it is determined that the amount of vector data is too large as compared to a given image amount, and the memory overflows, vector smoothing processing including variable magnification processing for a region of interest is suspended, and a binary image subjected to binary SPC processing is selected.

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patent: 5579405 (1996-11-01), Ishida et al.
patent: 5644366 (1997-07-01), Ushida et al.
patent: 5757961 (1998-05-01), Tamakawa et al.

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