Image filtering method

Details Image filtering method Image filtering method

2006-09-05

2006-09-05

Lee, Thomas D. (Department: 2624)

Facsimile and static presentation processing

Static presentation processing

Attribute control

C382S260000, C382S308000

Reexamination Certificate

active

07102793

ABSTRACT:
A method of filtering an input image is provided. In a creating action, a boolean tone map is created based on the input image and an array of tone nodes. In a determining action, it is determined whether or not a target pixel is in a tone region by examining the target pixel and a neighboring region of pixels. If the target pixel is in a tone region, in a selecting action, a first base-filter is selected for the tone region. A method of resolution dependent filtering is also provided.

REFERENCES:
patent: 2003/0108250 (2003-06-01), Luo et al.
patent: 2004/0091164 (2004-05-01), Sakatani et al.
Co-pending Hewlett-Packard Company, U.S. Application Serial No. 10/136,958, filed May 1, 2002, entitled “Parameterized Sharpening And Smoothing Method And Apparatus”.

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