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Reference TypeConference Proceedings
Identifier8JMKD3MGPBW34M/3A3LH85
Repositorysid.inpe.br/sibgrapi/2011/07.11.00.23
Metadatasid.inpe.br/sibgrapi/2011/07.11.00.23.35
Sitesibgrapi.sid.inpe.br
Citation KeyBelussiHira:2011:FaQRCo
Author1 Belussi, Luiz Felipe Franco
2 Hirata, Nina Sumiko Tomita
Affiliation1 Institute of Mathematics and Statistics, University of São Paulo
2 Institute of Mathematics and Statistics, University of São Paulo
TitleFast QR code detection in arbitrarily acquired images
Conference NameConference on Graphics, Patterns and Images, 24 (SIBGRAPI)
Year2011
EditorLewiner, Thomas
Torres, Ricardo
Book TitleProceedings
DateAug. 28 - 31, 2011
Publisher CityLos Alamitos
PublisherIEEE Computer Society Conference Publishing Services
Conference LocationMaceió
KeywordsQR code, 2D barcode, Haar-like features, cascade classifier, boosting, classification, pattern recognition.
AbstractThe 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.
Languageen
Tertiary TypeFull Paper
FormatDVD, On-line.
Size2946 KiB
Number of Files1
Target File86622_final.pdf
Last Update2011:07.11.01.01.55 sid.inpe.br/banon/2001/03.30.15.38 nina@ime.usp.br
Metadata Last Update2011:07.23.15.36.12 sid.inpe.br/banon/2001/03.30.15.38 nina@ime.usp.br {D 2011}
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e-Mail Addressnina@ime.usp.br
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History2011-07-23 15:36:12 :: nina@ime.usp.br -> :: 2011
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Access Date2019, Dec. 07

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