Document type discriminating apparatus

Details Document type discriminating apparatus Document type discriminating apparatus

2011-07-12

2011-07-12

Moore, David K (Department: 2625)

Facsimile and static presentation processing

Static presentation processing

Attribute control

C358S002100, C358S003060, C358S003100, C358S003260, C382S137000

Reexamination Certificate

active

07978365

ABSTRACT:
A document type discriminating apparatus is provided in which discrimination as to whether or not a document is a duplicate is made with high degree of accuracy. The document type discriminating apparatus includes means for discriminating whether a type of a screen pattern used in an image captured by reading a document is a line screen, means for detecting whether a value indicating a change in a period of the screen used in the image exceeds a predetermined value, means for detecting whether a value indicating sharpness of an edge seen in the image is lower than a predetermined value, means for detecting whether a value indicating a blur in an edge color seen in the image exceeds a predetermined value, and means for discriminating that the document is a duplicate when at least two out of the four detection results mentioned above are true.

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