Estimation of a color reflection model using range image data

Norihiro Tanaka; Shoji Tominaga

doi:10.1117/12.527286

18 December 2003 Estimation of a color reflection model using range image data

Norihiro Tanaka, Shoji Tominaga

Proceedings Volume 5293, Color Imaging IX: Processing, Hardcopy, and Applications; (2003) https://doi.org/10.1117/12.527286
Event: Electronic Imaging 2004, 2004, San Jose, California, United States

Abstract

A method is proposed for estimating various parameters of a reflection model using both the image data and the range data of an object surface. A unified measuring system, combining a laser range and a multi-band camera system, is made for acquiring the 3D shape data and the spectral reflectance data of the object surface. First, the diffuse reflection component and the specular reflection component at every pixel are obtained using the observed images at two illumination directions and the surface normal vectors calculated from the range data. The spectral reflectance is then estimated from the diffuse reflection component. Next, the extracted specular reflection component is fitted to the specular function of the Torrance-Sparrow model. The performance of the proposed method is examined on an experiment using a painted object in details. We show the estimation results for (1) spectral reflectance, (2) surface roughness, and (3) diffuse and specular intensities. The overall feasibility of the proposed method is confirmed based on computer graphics images created by using the estimated parameters.

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Norihiro Tanaka and Shoji Tominaga "Estimation of a color reflection model using range image data", Proc. SPIE 5293, Color Imaging IX: Processing, Hardcopy, and Applications, (18 December 2003); https://doi.org/10.1117/12.527286

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KEYWORDS

Reflection

Reflectivity

Data modeling

Cameras

Specular reflections

Imaging systems

Sensors

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