@techreport{weko_52566_1, author = "Du,Fei and Takahiro,Okabe and Yoichi,Sato and Akihiro,Sugimoto", title = "Reflectance Estimation under Complex Illumination", year = "2003", institution = "Institute of Industrial Science The University of Tokyo, Institute of Industrial Science The University of Tokyo, Institute of Industrial Science The University of Tokyo, National Institute of Informatics", number = "88(2003-CVIM-140)", month = "sep" }