Image analysis – Image transformation or preprocessing – Image storage or retrieval
Reexamination Certificate
2006-02-15
2011-10-11
Repko, Jason M (Department: 2624)
Image analysis
Image transformation or preprocessing
Image storage or retrieval
C382S306000, C707SE17008, C358S001900
Reexamination Certificate
active
08036497
ABSTRACT:
A document/image retrieval method for retrieving a document/image corresponding to a captured digital image from a database by comparing features calculated based on feature points of the captured digital image with features preliminarily calculated based on feature points of each of documents and/or images stored in the database, the method comprising: extracting the feature points from the captured digital image; defining a local set of feature points for each of the extracted feature points; selecting feature points from the defined local set to define a feature point subset of the local set; determining invariant values as values characterizing the defined subset for combinations of the feature points in the subset, the invariant values being invariant to a geometric transformation; calculating a feature by combining the determined invariant values; and performing a voting process on the documents and/or images in the database based on the preliminarily calculated features of the documents and/or images; whereby the document/image corresponding to the captured digital image is retrieved from the database.
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Iwamura Masakazu
Kise Koichi
Nakai Tomohiro
Birch & Stewart Kolasch & Birch, LLP
Osaka Prefecture University Public Corporation
Repko Jason M
Thomas Mia M
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