Method and apparatus for distortion detection of scanned image

Details Method and apparatus for distortion detection of scanned image Method and apparatus for distortion detection of scanned image

1994-06-22

2000-02-29

Johns, Andrew

Image analysis

Image sensing

Hand-held

382323, G06K 922, G06K 928

Patent

active

060319437

ABSTRACT:
The present invention is related to a method and an apparatus for distortion detection of a scanned image. The method for distortion detection of a scanned image comprises: a) obtaining a first value representative of a first scanning position for the image; b) obtaining a second value representative of a second scanning position for the image; and c) comparing the first and second values to determine there is a line-drop situation when the first and second values obtained in a sequential order are not predeterminedly sequential values. The apparatus for distortion detection of a scanned image comprises a value generator generating two values respectively representative of two scanning positions for the image, and a comparing unit for comparing the two values to determine there is a line-drop situation when the two values obtained in a sequential order are not predeterminedly sequential values. The present invention uses a different comparing logic and a simple structure apparatus to achieve the purpose of distortion detection of a scanned image and compensating the image when there is line-drop detected to make the scanning result more perfect.

REFERENCES:
patent: 3725862 (1973-04-01), Roberts
patent: 4553035 (1985-11-01), Malinsky et al.
patent: 4581761 (1986-04-01), Ichinokawa et al.
patent: 4872066 (1989-10-01), Yamagata et al.
patent: 4942621 (1990-07-01), Angwin
patent: 5170445 (1992-12-01), Nelson et al.

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