Robust Estimation of Light Directions and Albedo Map of an Object of Known Shape

• Tachikawa Takehiro

  Graduate School of Engineering Science, Osaka University

• Hiura Shinsaku

  Graduate School of Information Sciences, Hiroshima City University

• Sato Kosuke

  Graduate School of Engineering Science, Osaka University

Abstract

This paper describes a method to determine the direction of a light source and the distribution of diffuse reflectance from two images under different lighting conditions. While most inverse-rendering methods require 3 or more images, we investigate the use of only two images. Using the relationships between albedo and light direction at 6 or more points, we firstly show that it is possible to simultaneously estimate both of these if the shape of the target object is given. Then we extend our method to handle a specular object and shadow effect by applying a robust estimation method. Thorough experimentation shows that our method is feasible and stable not only for well controlled indoor scenes, but also for an outdoor environment illuminated by sunlight.

Journal

• IPSJ Transactions on Computer Vision and Applications

  IPSJ Transactions on Computer Vision and Applications 3 172-185, 2011

  Information Processing Society of Japan

Keywords

• Computer Vision and Pattern Recognition

Details

• CRID: 1390001205292561024
• NII Article ID: 130002124233
• NII Book ID: AN00116647
• ISSN: 18827772
• ISSN: 18826695
• ISSN: 03875806
• DOI: 10.2197/ipsjtcva.3.172
• NDL BIB ID: 023655561
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I023655561
• Web Site: http://www.jstage.jst.go.jp/article/ipsjtcva/3/0/3_0_172/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed