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		<identifier>8JMKD3MGPBW34M/3DJCFKE</identifier>
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		<site>sibgrapi.sid.inpe.br 802</site>
		<isbn>978-85-7669-273-7</isbn>
		<citationkey>TorreãoMatt:1995:OpFlAp</citationkey>
		<author>Torreão, José R. A.,</author>
		<author>Mattos, Germana M.,</author>
		<affiliation>Departamento de Informática da Universidade Federal de Pernambuco (UFPE)</affiliation>
		<affiliation>Departamento de Informática da Universidade Federal de Pernambuco (UFPE)</affiliation>
		<title>An Optical Flow Approach to Photometric Stereo</title>
		<conferencename>Simpósio Brasileiro de Computação Gráfica e Processamento de Imagens, 8 (SIBGRAPI)</conferencename>
		<year>1995</year>
		<editor>Lotufo, Roberto de Alencar,</editor>
		<editor>Mascarenhas, Nelson Delfino d'Ávila,</editor>
		<booktitle>Anais</booktitle>
		<date>25 - 27 out. 1995</date>
		<publisheraddress>Porto Alegre</publisheraddress>
		<publisher>Sociedade Brasileira de Computação</publisher>
		<conferencelocation>São Carlos</conferencelocation>
		<keywords>optical Flow, photometric stereo.</keywords>
		<abstract>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.</abstract>
		<pages>213-218</pages>
		<language>en</language>
		<type>Visão por Computador</type>
		<tertiarytype>Artigo</tertiarytype>
		<format>Impresso, On-line.</format>
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		<targetfile>27 An optical flow approach.pdf</targetfile>
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