System for distinguishing line patterns from halftone...

Details System for distinguishing line patterns from halftone... System for distinguishing line patterns from halftone...

2007-07-31

2007-07-31

Lamb, Twyler (Department: 2625)

Facsimile and static presentation processing

Static presentation processing

Attribute control

C382S176000, C382S173000, C382S205000, C382S224000, C358S003080, C358S003210, C358S003260, C358S533000, C358S463000, C358S003200, C358S536000, C358S462000, C358S461000, C358S296000, C358S296000

Reexamination Certificate

active

10272866

ABSTRACT:
In a system, such as in a digital copier, for classifying image data derived from an original image, the image data is classified by type. An algorithm is applied to the gray levels of pixels surrounding each pixel of interest. The algorithm determines whether a local maximum or minimum is part of an image of closely-spaced lines.

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