@InProceedings{BelussiHira:2011:FaQRCo,
author = "Belussi, Luiz Felipe Franco and Hirata, Nina Sumiko Tomita",
affiliation = "Institute of Mathematics and Statistics, University of S{\~a}o
Paulo and Institute of Mathematics and Statistics, University of
S{\~a}o Paulo",
title = "Fast QR code detection in arbitrarily acquired images",
booktitle = "Proceedings...",
year = "2011",
editor = "Lewiner, Thomas and Torres, Ricardo",
organization = "Conference on Graphics, Patterns and Images, 24. (SIBGRAPI)",
publisher = "IEEE Computer Society",
address = "Los Alamitos",
keywords = "QR code, 2D barcode, Haar-like features, cascade classifier,
boosting, classification, pattern recognition.",
abstract = "The detection of QR codes, a type of 2D barcode, as described in
the literature consists merely in the determination of the
boundaries of the symbol region in images obtained with the
specific intent of highlighting the symbol. However, many
important applications such as those related with accessibility
technologies or robotics, depends on first detecting the presence
of a barcode in an environment. We employ Viola-Jones rapid object
detection framework to address the problem of finding QR codes in
arbitrarily acquired images. This framework provides an efficient
way to focus the detection process in promising regions of the
image and a very fast feature calculation approach for pattern
classification. An extensive study of variations in the parameters
of the framework for detecting finder patterns, present in three
corners of every QR code, was carried out. Detection accuracy
superior to 90%, with controlled number of false positives, is
achieved. We also propose a post-processing algorithm that
aggregates the results of the first step and decides if the
detected finder patterns are part of QR code symbols. This
two-step processing is done in real time.",
conference-location = "Macei{\'o}, AL, Brazil",
conference-year = "28-31 Aug. 2011",
doi = "10.1109/SIBGRAPI.2011.16",
url = "http://dx.doi.org/10.1109/SIBGRAPI.2011.16",
language = "en",
ibi = "8JMKD3MGPBW34M/3A3LH85",
url = "http://urlib.net/ibi/8JMKD3MGPBW34M/3A3LH85",
targetfile = "86622_final.pdf",
urlaccessdate = "2024, Apr. 29"
}