System and method for enhancement of document images

Image analysis – Image transformation or preprocessing – Selecting a portion of an image

Reexamination Certificate

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C382S274000

Reexamination Certificate

active

10396223

ABSTRACT:
A method for enhancing electronic images of a document, in which the electronic images contain a background with foreground markings, includes receiving an electronic image containing pixels and assigning an initial provisional foreground/background status to the pixels. The initial foreground/background estimate is revised and a determination is made as to whether the revised foreground/background estimate is to be the final status assignment for the pixels of the image. If a final pixel status assignment has not been achieved, the estimate is again revised until a final foreground/background status is reached for the image pixels prior to creation of an output image.

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patent: 6570612 (2003-05-01), Saund et al.

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