Document scanning method and document scanner

Details Document scanning method and document scanner Document scanning method and document scanner

2007-11-20

2007-11-20

Bella, Matthew C. (Department: 2624)

Image analysis

Image transformation or preprocessing

Changing the image coordinates

C382S278000, C382S293000, C382S318000

Reexamination Certificate

active

10353508

ABSTRACT:
A document scanning method comprises causing relative movement between a document and first and second imaging elements, such that each of a succession of scan lines of the document is exposed in turn to the imaging elements; generating first and second image data words representative of overlapping portions of each scan line; and concatenating at least a portion of the words to generate a third word representative of the scan line, the method being characterised by the steps of cross-correlating at least a portion of each of the words to identify a portion of the second word that is included in the first word; discarding a portion of at least one of words; concatenating the first word or remainder thereof with the second word or remainder thereof to form the third word; and, if necessary, compressing or expanding the third word by linear interpolation so as to obtain a word of a predetermined length.

REFERENCES:
patent: 4282546 (1981-08-01), Reitmeier
patent: 5675672 (1997-10-01), Nakabayashi
patent: 2002/0051573 (2002-05-01), Sakai et al.

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