Image-based BRDF acquisition for non-spherical objects
吳宗益, 馬萬鈞, 莊永裕, 陳炳宇, 歐陽明, Tsung-Yi Wu, Wan‐Chun Ma, Yung‐Yu Chuang, Bing‐Yu Chen, Ming Ouhyoung · 2005
In order to create photorealistic images, we need to know how light is reflected from different materials. The bidirectional reflectance distribution functions (BRDF) plays an important role in modeling the reflectance of materials. This paper presents a framework for extracting BRDF samples from multiple photographs, which are taken from the same viewpoint but under different lighting directions, of an arbitrary object. After collecting samples, we use a smoothing interpolation to approximate the complete BRDF from the measured samples. Keyword:bidirectional reflectance distribution functions, acquisition, interpolation, image-based rendering 1 This work was supported by National Science Council under Grant 94-2213-E-002-096. 2 To whom all correspondence should be addressed.