Digital copier

Details Digital copier Digital copier

1995-06-02

1999-02-02

Vu, Kim Yen

Image analysis

Image transformation or preprocessing

Combining image portions

358450, 358452, 358543, H04N 1387

Patent

active

058676112

ABSTRACT:
In a digital copier which allow the quality of an output image to be adjusted in a plurality of levels, a scanner reads a document image and generates corresponding image data. An analog-to-digital converter transforms the image data to a pixel-by-pixel electric signal. The electric signal is written to an image memory. An image processing section reads a particular portion of the image (e.g. one-fifth in the subscanning direction) out of the memory repeatedly, while changing density each time. The results of such processing are sent to a recording section and printed on a single paper as a combined image. As a result, partial images representative of a particular density each are printed on a single paper. This not only promotes easy evaluation but also saves papers.

REFERENCES:
patent: 5124799 (1992-06-01), Tsuboi et al.
patent: 5181127 (1993-01-01), Ogino et al.
patent: 5260805 (1993-11-01), Barrett
patent: 5305116 (1994-04-01), Kagami
patent: 5446476 (1995-08-01), Kouzaki
patent: 5448346 (1995-09-01), Tabata
patent: 5457540 (1995-10-01), Kajita
patent: 5465163 (1995-11-01), Yoshihara et al.

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