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ICDAR
2005
IEEE

Camera-Based Document Image Retrieval as Voting for Partial Signatures of Projective Invariants

9 years 5 months ago
Camera-Based Document Image Retrieval as Voting for Partial Signatures of Projective Invariants
We propose a method of document image retrieval using digital cameras. The proposed method takes as input a part or the whole of a document acquired as a query by a digital camera, and retrieves a document image that includes the query. For this purpose, it is required to solve the problem of “perspective distortion” of images, as well as to establish a way of matching parts of document images flexibly. These are achieved based on the following characteristics of the proposed method: (1) Indexing of document images using the projective invariants called the “cross-ratios”, (2) Retrieval as voting for partial signatures of document images defined by the cross-ratios. From experimental results using digital cameras with high and low resolutions, we demonstrate the effectiveness of the proposed method.
Tomohiro Nakai, Koichi Kise, Masakazu Iwamura
Added 24 Jun 2010
Updated 24 Jun 2010
Type Conference
Year 2005
Where ICDAR
Authors Tomohiro Nakai, Koichi Kise, Masakazu Iwamura
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