Image processing device

Details Image processing device Image processing device

1998-03-05

2000-09-19

Rogers, Scott

Image analysis

Image enhancement or restoration

Image filter

382277, 382274, G06T 520

Patent

active

061224065

ABSTRACT:
An image processing device of the present invention includes a photoelectric transducing section for transforming input image information to an electric signal. An analog-to-digital converter converts the electric signal to a digital signal. An image processing section for processing the digital signal has a shading correcting section, a filtering section, a magnification changing section, a gamma correcting section, and a tonality processing section. The filtering section is capable of selecting a particular filter intensity for each of two perpendicular directions in accordance with a desired magnification change ratio. The device is capable of varying an MTF (Modulation Transfer Function) characteristic in the subscanning direction in accordance with a magnification change ratio with simple hardware.

REFERENCES:
patent: 4827433 (1989-05-01), Kamon
patent: 4969051 (1990-11-01), Sasaki
patent: 4979129 (1990-12-01), Okubo et al.
patent: 5410619 (1995-04-01), Fujisawa et al.
patent: 5835630 (1998-11-01), Schweid et al.
patent: 5857037 (1999-01-01), Saotome et al.
patent: 5982947 (1999-11-01), Hayashi

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