Facsimile and static presentation processing – Static presentation processing – Attribute control
Reexamination Certificate
2007-10-09
2007-10-09
Lamb, Twyler (Department: 2625)
Facsimile and static presentation processing
Static presentation processing
Attribute control
C382S224000, C382S173000, C382S192000, C382S194000, C345S596000, C345S611000
Reexamination Certificate
active
10217197
ABSTRACT:
In a system, such as in a digital copier, for classifying image data derived from an original image, the image data is enhanced before submission to a classification analysis. In the enhancement, portions of the image having a measured roughness (degree of gray level discontinuity) within a certain range are artificially increased in roughness. This increased roughness in the enhanced image data serves to increase confidence of the classification analysis for detecting low-frequency halftone screens, so that such low-frequency halftone areas are not misclassified as contone or high-frequency halftone areas.
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Hutter R.
Lamb Twyler
Xerox Corporation
Zheng Jacky X.
LandOfFree
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