%0 Conference Proceedings
%@isbn 978-85-7669-273-7
%A Torreão, José R. A.,
%A Mattos, Germana M.,
%@affiliation Departamento de Informática da Universidade Federal de Pernambuco (UFPE)
%@affiliation Departamento de Informática da Universidade Federal de Pernambuco (UFPE)
%T An Optical Flow Approach to Photometric Stereo
%B Simpósio Brasileiro de Computação Gráfica e Processamento de Imagens, 8 (SIBGRAPI)
%D 1995
%E Lotufo, Roberto de Alencar,
%E Mascarenhas, Nelson Delfino d'Ávila,
%S Anais
%8 25 - 27 out. 1995
%J Porto Alegre
%I Sociedade Brasileira de Computação
%C São Carlos
%K optical Flow, photometric stereo.
%X We introduce a new approach to photometric stereo (PS) in which the optical flow resulting from the change of illumination of the image surface is estimated and used for depth reconstruction through a structure from-motion scheme. The optical flow of the PS images is determined via a gradient-based algorithm, while a least-squares strategy is used for the structure-from-motion reconstruction, assuming that the irradiance pattern over the imaged surface undergoes a purely rotational rigid-body motion, when the illumination direction is changed. Our approach to PS has been successfully applied in the estimation of shape from both synthetic and real images of lambertian surfaces.
%P 213-218
%@language en
%9 Visão por Computador
%3 27 An optical flow approach.pdf