Antonio A. F. Oliveira Luiz M. G. Gonçalves Italo de Oliveira Matias Enhancing the Volumetric Approach to Stereo Matching. 218-225 2001 conf/sibgrapi/2001 SIBGRAPI http://dlib2.computer.org/conferen/sibgrapi/1330/pdf/13300218.pdf db/conf/sibgrapi/sibgrapi2001.html#OliveiraGM01