Barcode colorido compatível com o decodificador padrão do QR code

• Ano de defesa: 2015
• Autor(a) principal: Bortoluzzi, Matias Américo
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Santa Maria; Brasil; Ciência da Computação; UFSM; Programa de Pós-Graduação em Ciência da Computação; Centro de Tecnologia
• Palavras-chave em Português: QR code; Barcode colorido bidimensional; Cores de referência; Colour two-dimensional barcode; Reference colors; CNPQ::CIENCIAS EXATAS E DA TERRA::CIENCIA DA COMPUTACAO
• Link de acesso: http://repositorio.ufsm.br/handle/1/15442

Motivated by a number of potential applications for high data-density barcodes that can be easily photographed and decoded by smartphones, and analyzing the distortion imposed on a barcode by phone photography, this work presents the design of a new colored two-dimensional barcode compatible with the QR Code decoder. The data is independently encoded into three monochrome barcodes which are then combined so that the new barcode lead to a three-fold increase in data rate compared to the corresponding monochrome barcode. This methodology not only facilitates the decoding but also allows the re-use of optimizations and improvements developed for monochrome QR Codes. In order to minimize the channel impairments, we use reference colors spatially distribuited around the barcode, promoting a meaningful robustness improvement with low computational cost. Furthermore, we analised the acceptable ranges of image channel distortion parameters that are printer, capture condition and camera dependent.