Image analysis – Pattern recognition – Template matching
Reexamination Certificate
2008-09-08
2011-12-06
Tabatabai, Abolfazl (Department: 2624)
Image analysis
Pattern recognition
Template matching
C704S239000, C704S243000
Reexamination Certificate
active
08073262
ABSTRACT:
In an image matching apparatus of the present invention, only a connected region in which the number of pixels included therein exceeds a threshold value, among connected regions that are specified by a labeling process section, is sent to a centroid calculation process section from a threshold value processing section, and a centroid (feature point) of the connected region is calculated. When it is determined that a target document to be matched is an N-up document, the threshold value processing section uses, instead of a default threshold value, a variant threshold value that varies depending on the number of images laid out on the N-up document and a document size that are found and detected by an N-up document determination section and a document size detection section. This makes it possible to determine a similarity to a reference document with high accuracy even in a case of an N-up document, i.e., a case where each target image to be matched is reduced in size from an original image.
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US Office Action issued on Mar. 29, 2011 in U.S. Appl. No. 12/204,561.
Birch & Stewart Kolasch & Birch, LLP
Sharp Kabushiki Kaisha
Tabatabai Abolfazl
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