Aplicação da fotogrametria para o registro e avaliação de defeitos na superfície de pavimentos flexíveis

Abstract

A todos os professores do Departamento deOs resultados permitem concluir, preliminarmente, que o processo utilizado é viável de ser usado para registro e eventual acompanhamento de defeitos na superfície de pavimentos; e que os modelos obtidos das imagens produzidas pela câmara digital apresentam melhor qualidade que os obtidos da câmar~ convencional, independentemente da resolução usada, devido à má qualidade das imagens obtidas dos negativos quando numerizados em numerizador convencional, não específico para esse fim. ABSTRACTThe results from a first attempt to use terrestrial photogrametry applied to register the surface distresses on the flexible pavement, using non-metric photographic cameras with short focal distance are presented in this work. Two photographic cameras were used, a digital one that produces images with 504 x 756 points, and a conventional one, whose negatives were digitilized by a non calibrated scanner in two different resolutions, 600 and 1.200 dots per inch (dpi). The images were restored using the Digital Video Plotter (DVP) software, from Geomatic Systems Inc., and the three dimensions models were ma de with the aid of the software Softdesk, from Autod esk Inc. From the results, it is possible to conclude, preliminarily, that the utilized process is viable to be used to register the superficial pavement distresses and it also perrnits the future development of distress evolution models. lt is also possible to conclude th at the models obtained from the digital camera is better than those from the conventional one because the bad quality of the images obtained from the negatives when digitilized through convention al desktop scanner that is not proper to thi s finality.