Digital copying apparatus capable of forming a superior quality

Details Digital copying apparatus capable of forming a superior quality Digital copying apparatus capable of forming a superior quality

1997-03-04

1999-07-06

Couso, Jose L.

Image analysis

Image segmentation

382176, 382254, 382269, G06K 934, G06K 940

Patent

active

059206462

ABSTRACT:
A digital copying apparatus provides high quality copy images suitable for an original document image while reducing a necessary capacity of a memory for storing image data. An image signal read by an image reading unit is binarized by a binary gradation processing unit in a gradation processing unit and is stored in a memory unit. Then, binary image data read from the memory unit is applied to a multi-value processing unit, wherein a pattern recognition unit determines whether or not the binary image data includes a pixel which requires a jagged line correction, and a halftone detector detects a halftone region in the binary image data. A determination unit and a selector select jagged line correction data output from a pattern memory and multi-valued image data converted from the binary image data by a multi-value filter. The selected data is output to an image forming unit.

REFERENCES:
patent: 5317419 (1994-05-01), Koizumi
patent: 5506699 (1996-04-01), Wong
patent: 5630026 (1997-05-01), Ogletree et al.

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