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Estimating shape and reflectance of surfaces by color image analysis

  • Yingli Tian
  • Hungtat Tsui
Session IA2a — 3-D Image Analysis
Part of the Lecture Notes in Computer Science book series (LNCS, volume 1024)

Abstract

Sato and Ikeuchi[4] proposed an interesting method of shape recovery based on color image analysis which requires the object to be enclosed in a spherical diffuser. In this paper, we improve the method to relax this restriction. Like [4], we use the dichromatic-reflection model to separate the specular reflection and the diffuse reflection. In our method, the point light source is enclosed by a diffuser and is moved to different specified locations by a robot arm. This changes the lighting geometry and a new radiance function of the source is derived. On the whole, this is an improvement on the inconvenient set up of [4]. The capability of our method is verified by real experiments. A simulation package is also developed to test the efficacy of our approach for objects of different sizes under various forms of lighting geometry.

Keywords

Specular Reflection Shape Recovery Extended Source Photometric Stereo Point Light Source 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 1995

Authors and Affiliations

  • Yingli Tian
    • 1
  • Hungtat Tsui
    • 1
  1. 1.Department of Electronic EngineeringThe Chinese University of Hong KongHong Kong

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