Image analysis – Pattern recognition – Classification
Reexamination Certificate
2006-10-31
2006-10-31
Chawan, Sheela (Department: 2624)
Image analysis
Pattern recognition
Classification
C382S173000, C382S199000, C348S438100, C358S534000
Reexamination Certificate
active
07130469
ABSTRACT:
An edge pixel is extracted from an input image by an edge determination section, an object image section is extracted by an object-image extraction section, and a first characteristic amount of the object image section in a first local pixel block containing a first target pixel is calculated by a first-characteristic-amount calculation section. A classification is made as to whether the first target pixel is a character edge pixel or a dot edge pixel by an edge-class determination section on the basis of the result of extraction for the edge pixel and the first characteristic amount. A second characteristic amount of a second local pixel block containing a second target pixel is calculated by a second-characteristic-amount calculation section on the basis of the edge classification result. The image of the second target pixel is classified by an image-class determination section on the basis of the second characteristic amount.
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Takahashi, et al., “Bi-level Quantizing Method of Images Containing Text, Screened Halftone and Continuous Tone,” IIEE of Japan, pp. 19-25 (6 pgs), and Partial English Translation (3 pgs).
Chawan Sheela
Conlin David G.
Edwards Angell Palmer & & Dodge LLP
Hartnell George W.
Sharp Kabushiki Kaisha
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