@InProceedings{WilliamsLowHanPolLas:2004:AuImAl,
               author = "Williams, Nathaniel and Low, Kok-Lim and Hantak, Chad and 
                         Pollefeys, Marc and Lastra, Anselmo",
          affiliation = "{University of North Carolina at Chapel Hill}",
                title = "Automatic image alignment for 3D environment modeling",
            booktitle = "Proceedings...",
                 year = "2004",
               editor = "Ara{\'u}jo, Arnaldo de Albuquerque and Comba, Jo{\~a}o Luiz Dihl 
                         and Navazo, Isabel and Sousa, Ant{\^o}nio Augusto de",
         organization = "Brazilian Symposium on Computer Graphics and Image Processing, 17. 
                         (SIBGRAPI) - Ibero-American Symposium on Computer Graphics, 2 
                         (SIACG)",
            publisher = "IEEE Computer Society",
              address = "Los Alamitos",
             keywords = "image registration, 3D imaging. .",
             abstract = "We describe an approach for automatically registering color images 
                         with 3D laser scanned models. We use the chi-square statistic to 
                         compare color images to polygonal models texture mapped with 
                         acquired laser reflectance values. In complicated scenes we find 
                         that the chi-square test is not robust enough to permit an 
                         automatic global registration approach. Therefore, we introduce 
                         two techniques for obtaining initial pose estimates that 
                         correspond to a coarse alignment of the data. The first method is 
                         based on rigidly attaching a camera to a laser scanner and the 
                         second utilizes object tracking to decouple these imaging devices. 
                         The pose estimates serve as an initial guess for our optimization 
                         method, which maximizes the chi-square statistic over a local 
                         space of transformations in order to automatically determine the 
                         proper alignment.",
  conference-location = "Curitiba, PR, Brazil",
      conference-year = "17-20 Oct. 2004",
                  doi = "10.1109/SIBGRA.2004.1352985",
                  url = "http://dx.doi.org/10.1109/SIBGRA.2004.1352985",
             language = "en",
                  ibi = "6qtX3pFwXQZeBBx/D34qc",
                  url = "http://urlib.net/ibi/6qtX3pFwXQZeBBx/D34qc",
        urlaccessdate = "2024, May 02"
}