Method and apparatus for removing noise from a digital image

Details Method and apparatus for removing noise from a digital image Method and apparatus for removing noise from a digital image

2009-12-28

2011-11-22

Cunningham, Gregory F (Department: 2624)

Image analysis

Image enhancement or restoration

Artifact removal or suppression

C348S666000, C358S003260

Reexamination Certificate

active

08064721

ABSTRACT:
One embodiment of the present invention provides a system that removes noise from an image. During operation, the system first identifies blobs in the image, wherein a blob is a set of contiguous pixels which possibly represents a character or a portion of a character in the image. Next, the system analyzes the blobs to dynamically determine a “noise threshold” for the blobs. The system then removes blobs from the image which are below the noise threshold.

REFERENCES:
patent: 4888812 (1989-12-01), Dinan et al.
patent: 5195147 (1993-03-01), Ohta
patent: 5337373 (1994-08-01), Marandici et al.
patent: 5457754 (1995-10-01), Han et al.
patent: 5471434 (1995-11-01), Davis et al.
patent: 5542006 (1996-07-01), Shustorovich et al.
patent: 5841902 (1998-11-01), Tu
patent: 6728401 (2004-04-01), Hardeberg
patent: 2002/0101543 (2002-08-01), Ojo et al.
patent: 2003/0068093 (2003-04-01), Baggs
patent: 2006/0008151 (2006-01-01), Lin et al.
patent: 2006/0269111 (2006-11-01), Stoecker
patent: 2007/0040062 (2007-02-01), Lau et al.
patent: 2007/0083114 (2007-04-01), Yang et al.
patent: 2009/0262223 (2009-10-01), Hwang
patent: 63 250787 (1988-10-01), None
patent: 01/26038 (2001-04-01), None
International Search Report in Application PCT/US2006/061294, mailed Apr. 17, 2007.

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