Method and system for automatically detecting a background type

Details Method and system for automatically detecting a background type Method and system for automatically detecting a background type

1998-03-31

2000-03-28

Rogers, Scott

Facsimile and static presentation processing

Static presentation processing

Attribute control

382169, 382274, G06K 1502, G06T 540

Patent

active

060439009

ABSTRACT:
A method and system automatically determines proper background values for a document. A histogram of the document is generated and it is determined whether a background characteristic of the document is uniform. If the background is uniform, a white background value is set equal to a first calculated white peak value. If the background is non-uniform, the white background value is set equal to a second calculated white peak value. A foreground value of the document is analyzed for validity when it is determined that a background characteristic of the document is uniform. A black background value is set equal to a black peak value calculated from the histogram when it is determined that a foreground value of the document is valid.

REFERENCES:
patent: 4695884 (1987-09-01), Anastassiou et al.
patent: 5133022 (1992-07-01), Weideman
patent: 5680477 (1997-10-01), Asada

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