Density-dependent sharpening

Details Density-dependent sharpening Density-dependent sharpening

2008-05-13

2008-05-13

Couso, Jose L. (Department: 2624)

Image analysis

Image enhancement or restoration

Focus measuring or adjusting

Reexamination Certificate

active

07373011

ABSTRACT:
A sharpening filter is disclosed for performing density-dependent sharpening on digital images. In one embodiment, a digital image to be sharpened is decomposed into a plurality of high-pass versions of the image at different resolutions. These high-pass images are gained at each resolution and recombined with the original image to produce a sharpened version of the image. The gains that are applied at each resolution are density-dependent. As a result, the effects of density-dependent blurring are counteracted, such that the sharpness of the final printed image is independent of the print density. Techniques are disclosed for performing such density-dependent sharpening with a high degree of computational efficiency.

REFERENCES:
patent: 5392137 (1995-02-01), Okubo
patent: 5867606 (1999-02-01), Tretter
patent: 6252995 (2001-06-01), Takamori
patent: 6304341 (2001-10-01), Koide et al.
patent: 6411305 (2002-06-01), Chui
patent: 6807299 (2004-10-01), Sobol
patent: 7269300 (2007-09-01), Braun et al.
patent: 2002/0097439 (2002-07-01), Braica
patent: 2002/0163670 (2002-11-01), Takahira
patent: 1 330 114 (2003-07-01), None
patent: 58151773 (1983-09-01), None
patent: 61230571 (1986-10-01), None
patent: 03036672 (1991-02-01), None
patent: 7-274004 (1995-10-01), None
patent: 07274004 (1995-10-01), None
patent: 2001-197311 (2001-07-01), None
patent: 2001197311 (2001-07-01), None

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