CAETANO, Carlos A. ; BREMOND, Francois; SCHWARTZ, William R. . Skeleton Image Representation for 3D Action Recognition based on Tree Structure and Reference Joints. In: CONFERENCE ON GRAPHICS, PATTERNS AND IMAGES (SIBGRAPI), 32. , 2019, Rio de Janeiro. Anais [...]. Porto Alegre: Sociedade Brasileira de Computação, 2019 . DOI: https://doi.org/10.5753/sibgrapi.2019.9799.