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Erschienen in:
1999 | OriginalPaper | Buchkapitel
Image-Based BRDF Measurement Including Human Skin
verfasst von : Stephen R. Marschner, Stephen H. Westin, Eric P. F. Lafortune, Kenneth E. Torrance, Donald P. Greenberg
Erschienen in: Rendering Techniques’ 99
Verlag: Springer Vienna
Enthalten in: Professional Book Archive
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We 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’y 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 gonioreflectomter.