System and method for digital document alignment

Details System and method for digital document alignment System and method for digital document alignment

2006-12-05

2006-12-05

Grant, Jerome (Department: 2625)

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

C358S474000, C358S537000, C382S289000

Reexamination Certificate

active

07145699

ABSTRACT:
A system and method are provided for aligning a scanned document in a digital scanner. The method comprises: scanning a document to create a matrix of pixel information; averaging pixel intensity information into a first plurality of row-mean buffer elements, where each row strip includes information from a second plurality of column elements; and, averaging pixel information into a third plurality of column-mean buffer elements, where each column strip includes information from a fourth plurality of row elements; comparing adjacent elements of matrix row information to generate a first set of edge positions; comparing adjacent elements of matrix column information to generate a second set of edge positions; generating a rotation angle in response to analyzing the first and second edge positions; and, rotating the scanned document by the rotation angle.

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