Title :
Recovery of 3-D shape using hybrid reflectance model
Author :
Jung, Eunjin ; Yun, Il Dong ; Lee, Sang Uk
Author_Institution :
Dept. of Control & Instrum. Eng., Seoul Nat. Univ., South Korea
Abstract :
A 3-D shape recovery algorithm, which is based on the hybrid reflectance model and M ring shaped lights for specular surfaces, is presented. We derive a radiance Lr as a function of slant angle θn of a surface point in polar coordinate. Then, by using the input intensity images and the radiance function, the M slant angle at each point are obtained. The final slant angle is determined as a weighted sum of the M slant angles. Finally, the surface gradient, which is obtained from the slant angle and its contours, is integrated to the depth map. Examples are provided using both synthetic and real data
Keywords :
image processing; light reflection; light sources; reflectivity; 3-D shape recovery algorithm; contours; depth map; hybrid reflectance model; input intensity images; light sources; polar coordinate; radiance function; real data; ring shaped lights; slant angle; specular surfaces; surface gradient; surface point; synthetic data; weighted sum; Artificial intelligence; Electronic mail; Light sources; Lighting control; Optical reflection; Reflectivity; Rough surfaces; Shape control; Solid modeling; Surface roughness;
Conference_Titel :
Image Processing, 1994. Proceedings. ICIP-94., IEEE International Conference
Conference_Location :
Austin, TX
Print_ISBN :
0-8186-6952-7
DOI :
10.1109/ICIP.1994.413543