@InProceedings{Namikawa:2017:MeBuCl,
               author = "Namikawa, Laercio M.",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)}",
                title = "A method to build cloud free Images from CBERS-4 AWFI sensor using 
                         median filtering",
            booktitle = "Anais...",
                 year = "2017",
               editor = "Davis Jr., Clodoveu A. (UFMG) and Queiroz, Gilberto R. de (INPE)",
                pages = "52--61",
         organization = "Simp{\'o}sio Brasileiro de Geoinform{\'a}tica, 18. (GEOINFO)",
            publisher = "Instituto Nacional de Pesquisas Espaciais (INPE)",
              address = "S{\~a}o Jos{\'e} dos Campos",
             abstract = "Cloud free images are useful for applications where the user is 
                         more interested in the visual identification of variability of a 
                         phenomenon than in the actual values. The presence of clouds and 
                         their shadows hinder the visual interpretation in these 
                         applications. Median values in data sets are a better 
                         representation of the true value than the average when the data 
                         set is contaminated with unusual high or low values. Since clouds 
                         and their shadows are these unusual values, the median value of a 
                         pixel from images gathered in different conditions could provide 
                         true representation of the pixel value. To test this hypothesis, 
                         images from CBERS-4 AWFI sensor covering an area of 70 Km by 60 km 
                         around Brasi\́lia in Brazil and acquired from 2017/July/20th 
                         to 2017/August/24th were processed using data sets with 3, 5 and 6 
                         images. The results indicate that the smaller set is enough to 
                         build a cloud free image where a pixel has at least 2 cloud free 
                         data. In more general cases, 6 images are enough to build a cloud 
                         free data.",
  conference-location = "Salvador",
      conference-year = "04-06 dez. 2017",
                 issn = "2179-4820",
             language = "pt",
                  ibi = "8JMKD3MGPDW34P/3Q5DL3E",
                  url = "http://urlib.net/ibi/8JMKD3MGPDW34P/3Q5DL3E",
           targetfile = "6namikawa.pdf",
        urlaccessdate = "27 abr. 2024"
}