Facsimile and static presentation processing – Static presentation processing – Attribute control
Reexamination Certificate
2006-08-01
2006-08-01
Rogers, Scott A. (Department: 2625)
Facsimile and static presentation processing
Static presentation processing
Attribute control
C358S003240, C358S003270, C382S173000, C382S264000, C382S257000
Reexamination Certificate
active
07085013
ABSTRACT:
An image processing apparatus includes a maximum/minimum density detecting unit which detects a center pixel of a matrix of N×N pixels in image data that has a maximum or minimum density. A determination unit determines whether the absolute value of a difference between an average of densities of diagonal pixels of the matrix and a density of the center pixel is larger than a threshold value. A peak pixel detecting unit detects peak pixels of the matrix, each peak pixel being the center pixel having a maximum or minimum density, and the absolute value of the difference with respect to the center pixel being larger than the threshold value. A dot region detecting unit detects one of neighboring pixels of the matrix as being a dot region based on the number of the peak pixels in a target region and the number of the peak pixels in each of neighboring regions.
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Ricoh & Company, Ltd.
Rogers Scott A.
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