@InProceedings{PereiraVelh:2009:RgImEd,
               author = "Pereira, Thiago and Velho, Luiz Carlos Pacheco Rodrigues",
          affiliation = "{Instituto de Matematica Pura e Aplicada} and {Instituto de 
                         Matematica Pura e Aplicada}",
                title = "Rgbn Image Editing",
            booktitle = "Proceedings...",
                 year = "2009",
               editor = "Nonato, Luis Gustavo and Scharcanski, Jacob",
         organization = "Brazilian Symposium on Computer Graphics and Image Processing, 22. 
                         (SIBGRAPI)",
            publisher = "IEEE Computer Society",
              address = "Los Alamitos",
             keywords = "RGBN, normal map, gradient reconstruction, normal processing, 
                         \fi,ltering, deformation.",
             abstract = "We propose a method to edit RGBNs (images with a color and a 
                         normal channel). High resolution RGBNs are easy to obtain using 
                         photometric stereo. Free editing will result in normals which do 
                         not correspond to any realizable surface. Our normal operators 
                         guarantee the integrability of the results. Our method can 
                         \filter normals with any linear kernel allowing high-pass 
                         and edge-enhancement \filters. We have designed a normal 
                         linear combination method for adding details with frequency 
                         control. New geometric features can be created with a custom brush 
                         that warps deformations along its path. A nonlinear operator is 
                         also proposed. Its integrability is controlled with a two-band 
                         separation of frequencies: smooth shape and details. .",
  conference-location = "Rio de Janeiro, RJ, Brazil",
      conference-year = "11-14 Oct. 2009",
                  doi = "10.1109/SIBGRAPI.2009.28",
                  url = "http://dx.doi.org/10.1109/SIBGRAPI.2009.28",
             language = "en",
                  ibi = "8JMKD3MGPBW4/362GCKE",
                  url = "http://urlib.net/ibi/8JMKD3MGPBW4/362GCKE",
           targetfile = "rgbn_image_editing.pdf",
        urlaccessdate = "2024, May 03"
}