Errata for "Shape and Spatially-Varying BRDFs From Photometric Stereo"
There is an error in both the ICCV 2005 and PAMI 2009 versions of this paper. In the Ward reflectance model (2005 eq. 4 and 2009 eq. 2), cos(φr) should be cos(θr). Thanks to Forrester Cole for finding it!