%0 Conference Proceedings
%4 sid.inpe.br/marte2/2017/10.27.12.53.41
%2 sid.inpe.br/marte2/2017/10.27.12.53.42
%@isbn 978-85-17-00088-1
%F 59623
%T Calibração radiométrica de câmera fotográfica digital Vis/NIR para uso em sensoriamento remoto
%D 2017
%A Crusiol, Luís Guilherme Teixeira,
%A Nanni, Marcos Rafael,
%A Furlanetto, Renato Herrig,
%A Capristo, Guilherme Fernando,
%A Gualberto, Anderson Antonio da Silva,
%A Gasparotto, Aline de Carvalho,
%A Paula, Mariana Nunes de,
%@electronicmailaddress luisguilherme_crusiol@hotmail.com
%E Gherardi, Douglas Francisco Marcolino,
%E Aragão, Luiz Eduardo Oliveira e Cruz de,
%B Simpósio Brasileiro de Sensoriamento Remoto, 18 (SBSR)
%C Santos
%8 28-31 maio 2017
%I Instituto Nacional de Pesquisas Espaciais (INPE)
%J São José dos Campos
%P 2968-2973
%S Anais
%1 Instituto Nacional de Pesquisas Espaciais (INPE)
%X 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.
%9 Radiometria e sensores
%@language pt
%3 59623.pdf