Table of Contents
ISRN Machine Vision
Volume 2012 (2012), Article ID 945973, 15 pages
http://dx.doi.org/10.5402/2012/945973
Research Article

An Effective Color Addition to Feature Detection and Description for Book Spine Image Matching

Electrical and Computer Engineering Department, Brigham Young University, Provo, UT 84602, USA

Received 18 August 2011; Accepted 18 September 2011

Academic Editor: W. L. Woo

Copyright © 2012 Spencer G. Fowers and Dah-Jye Lee. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The important task of library book inventory, or shelf-reading, requires humans to remove each book from a library shelf, open the front cover, scan a barcode, and reshelve the book. It is a labor-intensive and often error-prone process. Technologies such as 2D barcode scanning or radio frequency identification (RFID) tags have recently been proposed to improve this process. They both incur significant upfront costs and require a large investment of time to fit books with special tags before the system can be productive. A vision-based automation system is proposed to improve this process without those prohibitively high upfront costs. This low-cost shelf-reading system uses a hand-held imaging device such as a smartphone to capture book spine images and a server that processes feature descriptors in these images for book identification. Existing color feature descriptors for feature matching typically use grayscale feature detectors, which omit important color edges. Also, photometric-invariant color feature descriptors require unnecessary computations to provide color descriptor information. This paper presents the development of a simple color enhancement feature descriptor called Color Difference-of-Gaussians SIFT (CDSIFT). CDSIFT is well suited for library inventory process automation, and this paper introduces such a system for this unique application.