Manual scanning type image input device and image signal process

Details Manual scanning type image input device and image signal process Manual scanning type image input device and image signal process

1997-12-02

2000-05-02

Vu, Kim Yen

Image analysis

Image sensing

Hand-held

358473, 358474, H04N 140

Patent

active

060582243

ABSTRACT:
In a manual scanning type image input apparatus and an image signal processing method, unevenness of scanning is hard to occur due to the simple constitution. A line image sensor reads an image data of prescribed manuscript while implementing electrical main scanning with predetermined driving cycle, before a movement distance encoder detects movement distance in the direction of mechanical auxiliary scanning. A line image data which is read by the line image sensor is distributed to either one of two systems to be stored temporarily in the line memory of the two systems. The line image data which is stored temporarily is read out selectively by a data selector, before being constructed as an image data based on an address of the selected line image data by decoder. The line memory temporarily stores the whole line image data outputted from the line image sensor, before reading out the line image data while thinning out thereof based on the movement distance in the direction of mechanical auxiliary scanning whereby it becomes capable of constructing the image data of the manuscript without unevenness based on the mechanical auxiliary scanning of equal velocity.

REFERENCES:
patent: 4851921 (1989-07-01), Sato et al.
patent: 4866535 (1989-09-01), Kubota et al.
patent: 5317417 (1994-05-01), Yamamura et al.
patent: 5684601 (1997-11-01), Endo
patent: 5883729 (1999-03-01), Miyazawa

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