Marschner, Stephen R.Westin, Stephen H.Lafortune, Eric P. F.Torrance, Kenneth E.Greenberg, Donald P.Dani Lischinski and Greg Ward Larson2014-01-272014-01-2719993-211-83382-X1727-3463https://doi.org/10.2312/EGWR/EGWR99/131-144We present a new image-based process for measuring the bidirectional reflectance of homogeneous surfaces rapidly, completely, and accurately. For simple sample shapes (spheres and cylinders) the method requires only a digital camera and a stable light source. Adding a 3D scanner allows a wide class of curved near-convex objects to be measured. With measurements for a variety of materials from paints to human skin, we demonstrate the new method s ability to achieve high resolution and accuracy over a large domain of illumination and reflection directions. We verify our measurements by tests of internal consistency and by comparison against measurements made using a gonioreflectometer.