Using difference kernels for image filtering

Image analysis – Image transformation or preprocessing – Convolution

Reexamination Certificate

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Details

C382S205000, C382S210000, C382S260000

Reexamination Certificate

active

07359576

ABSTRACT:
Methods and apparatus, including computer program products, for filtering an image. A filter kernel is received to determine one or more filtered values for each pixel in a sequence of pixels, where adjacent pixels are separated by a characteristic distance in the image. A difference kernel is defined based on local differences between a first kernel and a second kernel that are defined by the filter kernel centered at a first location and a second location, respectively. The second location is separated from the first location by the characteristic distance separating adjacent pixels in the sequence. The difference kernel is used to determine a difference between filtered values of adjacent pixels in the sequence. For depth of field filtering, the filter kernel can include a blur filter kernel that is based upon depth values of pixels in the sequence.

REFERENCES:
patent: 5541658 (1996-07-01), Ishiwata
patent: 5615243 (1997-03-01), Chang et al.
patent: 6215496 (2001-04-01), Szeliski et al.
patent: 6457032 (2002-09-01), Silver
patent: 6556696 (2003-04-01), Summers et al.
patent: 6704049 (2004-03-01), Fossum
patent: 6728416 (2004-04-01), Gallagher
patent: 6765589 (2004-07-01), Georgiev et al.
patent: 6791540 (2004-09-01), Baumberg
patent: 7098932 (2006-08-01), Georgiev et al.
patent: 7171436 (2007-01-01), Egelmeers et al.
patent: 2003/0095693 (2003-05-01), Kaufman et al.
patent: 2003/0169944 (2003-09-01), Dowski et al.
patent: 2003/0197877 (2003-10-01), Lee
patent: 2005/0025378 (2005-02-01), Maurer
Frishchluft, Home and Lens care, http://www.frischluft.com/; Jan. 2004, Downloaded from the internet: http://web.archive.org/web/20040110021822/http://www.frischluft.com on Jan. 30, 2006, 6 pages.
IrisFilter: http://www.reiji.net/iris-e/index.html, Title and Introduction, 2004, Downloaded from the internet: http://web.archive.org/web/20040206145438/http://www.reiji.net/iris-e/index.html on Jan. 30, 2006, 5 pages.

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