%0 Conference Proceedings
%4 sid.inpe.br/sibgrapi/2011/07.11.02.05
%2 sid.inpe.br/sibgrapi/2011/07.11.02.05.15
%@doi 10.1109/SIBGRAPI.2011.6
%T Colorization and Illumination of 2D Animations Based on a Region-tree Representation
%D 2011
%A Nascimento, Renata,
%A Queiroz, Fabiane,
%A Rocha, Allan,
%A Ren, Tsang Ing,
%A Mello, Vinicius,
%A Peixoto, Adelailson,
%@affiliation Department of Mathematics, PUC–Rio, Rio de Janeiro, Brazil
%@affiliation Department of Computer Science, UFPE, Pernambuco, Brazil
%@affiliation Department of Computer Science, PUC–Rio, Rio de Janeiro, Brazil
%@affiliation Department of Computer Science, UFPE, Pernambuco, Brazil
%@affiliation Institute of Mathematics, UFBA, Salvador, Brazil
%@affiliation Institute of Mathematics, UFAL, Maceió, Brazil
%E Lewiner, Thomas,
%E Torres, Ricardo,
%B Conference on Graphics, Patterns and Images, 24 (SIBGRAPI)
%C Maceió, AL, Brazil
%8 28-31 Aug. 2011
%I IEEE Computer Society
%J Los Alamitos
%S Proceedings
%K drawing, region-tree, illumination, colorization,animation.
%X Colorization and illumination are key processes for creating animated cartoons. Computer assisted methods have been incorporated in animation/illustration systems to reduce the artists' effort. This paper presents a new strategy for illumination and colorization of 2D drawings based on a region-tree. Starting from a hand-drawn cartoon, it extracts geometric and topological information and builds a tree structure, ensuring independence among parts of the drawing, such as curves and regions. Based on this structure and its attributes, a colorization method that propagates through consecutive frames of animation is proposed, together with an interpolation method that accurately computes a normal mapping for the illumination process. Different operators on curve and region attributes can be applied independently, obtaining different rendering effects.
%@language en
%3 86798.pdf