@InProceedings{CrusiolNaFuCaGuGaPa:2017:CaRaCā,
               author = "Crusiol, Lu{\'{\i}}s Guilherme Teixeira and Nanni, Marcos Rafael 
                         and Furlanetto, Renato Herrig and Capristo, Guilherme Fernando and 
                         Gualberto, Anderson Antonio da Silva and Gasparotto, Aline de 
                         Carvalho and Paula, Mariana Nunes de",
                title = "Calibra{\c{c}}{\~a}o radiom{\'e}trica de c{\^a}mera 
                         fotogr{\'a}fica digital Vis/NIR para uso em sensoriamento 
                         remoto",
            booktitle = "Anais...",
                 year = "2017",
               editor = "Gherardi, Douglas Francisco Marcolino and Arag{\~a}o, Luiz 
                         Eduardo Oliveira e Cruz de",
                pages = "2968--2973",
         organization = "Simp{\'o}sio Brasileiro de Sensoriamento Remoto, 18. (SBSR)",
            publisher = "Instituto Nacional de Pesquisas Espaciais (INPE)",
              address = "S{\~a}o Jos{\'e} dos Campos",
             abstract = "It is observed different understandings regarding the relationship 
                         between the incoming radiation on the sensor and the reflectance 
                         of targets. Thus, since reflectance values are obtained by the 
                         ratio of the radiance of specific target by the radiance of a 
                         standard target, calibration models that evolves those variables 
                         could be developed in order to the acquisition of truly spectral 
                         behavior of targets using digital camera. The present paper aimed 
                         to developed radiometric calibration models of digital cameras for 
                         red (R), green (G), blue (B) and near infrared (NIR) channels. To 
                         achieve the calibration, a Fujifilm S200-EXR camera, with 8 bits 
                         radiometric resolution, was used. In these process, the focus of 
                         the lens was locked, avoiding external interferences, and the 
                         white balance was performed for the illumination conditions of the 
                         laboratory (completely isolated from external light sources, with 
                         wall, floor and other instruments in dark color). The software 
                         Quantum GIS 2.6.1 was used to extract the digital numbers of R, G, 
                         B and NIR channels of six calibration targets. The Fieldspec 3 Jr, 
                         with spectral resolution of 3 nm from 350 to 1400 nm and 30 nm 
                         from 1400 to 2500 nm was used to collect the reflectance of the 
                         calibration targets. The digital numbers of the six calibration 
                         targets were, then, correlated to its reflectance values. The 
                         obtained results showed the minor R2 for RED channel (R2 = 0,77) 
                         and higher R2 for G, G, and NIR bands, 0,98; 0,92 e 0,99 
                         respectively. We concluded that the radiometric calibration of 
                         digital cameras on R, G, B and NIR bands allows the obtainment of 
                         reliable spectral values and might be used, therefore, as remote 
                         sensor.",
  conference-location = "Santos",
      conference-year = "28-31 maio 2017",
                 isbn = "978-85-17-00088-1",
                label = "59623",
             language = "pt",
         organisation = "Instituto Nacional de Pesquisas Espaciais (INPE)",
                  ibi = "8JMKD3MGP6W34M/3PSLRJA",
                  url = "http://urlib.net/ibi/8JMKD3MGP6W34M/3PSLRJA",
           targetfile = "59623.pdf",
                 type = "Radiometria e sensores",
        urlaccessdate = "27 abr. 2024"
}