Ciência da Computação
URI permanente desta comunidadehttps://repositorio.fei.edu.br/handle/FEI/342
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3 resultados
Resultados da Pesquisa
- Water leaks detection based on thermal images(2019-08-28) PENTEADO, C.; OLIVATTI, Y.; LOPES, G.; RODRIGUES, P.; Rodrigo Maia; Plinio Thomaz Aquino Junior© 2018 IEEE.In this paper, a digital image processing methodology based on thermal images to detect and locate water leak in underground pipes will be presented. With the advent of smart cities, some countries began to face this problem with technologies, such as Smart Water Grids. However, with this proposal it is intended to contribute with the smart cities context but with a nondestructive and less complex system. Also, it is proposed in this paper the use of the q-sigmoid function that is an alternative to pre-processing step to digital image processing. The potential of this function will be validated as method to contrast enhancement and to highlight regions of interest. The proposal was applied in thermal images captured from the soil surface with an underground water leak. Such conditions were proposed into a laboratory, using an ideal model with sandy soil. The results obtained from this experiment were promising, since it was able to detect leaks at early stages of the experiment, which suggest a potential use of the methodology and the proposed preprocessing technique to detect water leaks.
- A Bio-Inspired Methodology for Digital Imaging Forensic Detection(2019-09-05) SANTOS, G. L.; OLIVEIRA, G. R.; PRADO, F. F.; SERIKAKU, R.; SANTOS, R. M.; LOPES, G.; RODRIGUES, P. S.© 2019 IEEE.The increasing number of digital media users, as well as the development of multimedia platforms, such as smartphones and tablets, has also increased the number of users who professionally and fraudulently manipulate all types of digital media. This paper proposes a methodology based on an image processing pipeline to detect mainly copy-move type frauds, which are intended to hide or enlarge visual information. Our proposal has been tested in a Copy-Move Forgery database and the results were equal or better in performance than the state-of-art methods.
Artigo Anti-patterns apoiando a documentação dos problemas de usabilidade(2008) MASIERO, A. A.; LOPES, G.; GONÇALVES, M. H.; AQUINO JUNIOR, Plinio ThomazEste artigo descreve uma metodologia para documentação de barreiras encontradas em interfaces. A partir de uma avaliação realizada em qualquer interface é possível documentar estas barreiras utilizando o conceito de anti-patterns, gerando uma base de conhecimento para evitar re-trabalhos futuros e auxiliar no design de interfaces