Obtaining Bidirectional Texture Reflectance of Human Skin by means of a Kaleidoscope

Abstract

Until very recently, the various techniques for measuring bidirectional texture reflectance have been complicated and time-consuming. Moreover, inherent limitations of these techniques have inhibited a true sampling of the bidirectional texture reflectance of spatially-varying surfaces in particular - most notably, human skin.

A paper presented at the annual ACM SIGGRAPH conference in 2003 advocated a new technique of measurement by means of a kaleidoscope. This method allows the same surface sample to be viewed simultaneously from many different angles in situ, under arbitrary lighting conditions. The implication is that a far richer sample of bidirectional texture reflectance can now be obtained from human skin, and under natural conditions.

This particular research aims to use the aforementioned kaleidoscope technique to obtain a dense bidirectional texture reflectance sample of human skin. Since the method described is optimised to measure the bidirectional texture reflectance of surfaces with high self-shadowing (in contrast to human skin), experimentation will be necessary to determine the ideal configuration for obtaining the richest possible sample for human skin.

The resulting data will then be compared to samples obtained from alternative techniques, and the system assessed. Assuming the system to be successful (that is, a dense sample is obtained) the research will then move on to the application of the information to a surface model, being the realisation of the research.

Participants

Conference Papers (peer reviewed)

[1] Shaun Bangay and Judith Radloff. Kaleidoscope configurations for reflectance measurement. In Afrigraph '04: Proceedings of the 3rd international conference on Computer graphics, virtual reality, visualisation and interaction in Africa, pages 161-170, Stellenbosch, South Africa, November 2004. ACM Press, New York, NY, USA. [PDF] [BibTeX]

Technical Reports

[1] Judith Radloff. Obtaining the bidirectional texture reflectance of real-world surfaces by means of a kaleidoscope. Technical Report Honours Project Report, Virtual Reality Special Interest Group, Computer Science Department, Rhodes University, Grahamstown, South Africa, November 2004. [PDF] [BibTeX]

[2] Judith Radloff. Obtaining the bidirectional texture reflectance of real-world surfaces by means of a kaleidoscope. Technical report, Virtual Reality Special Interest Group, Computer Science Department, Rhodes University, Grahamstown, South Africa, October 2004. [PDF] [BibTeX]

[3] Judith Radloff. Obtaining bidirectional texture reflectance of real-world surfaces by means of a kaleidoscope. Technical Report Poster, Virtual Reality Special Interest Group, Computer Science Department, Rhodes University, Grahamstown, South Africa, August 2004. [PDF] [BibTeX]

[4] Judith Radloff. A literature review of reflectance measurement and its application in the realistic rendering of surfaces. Technical Report Literature Review, Virtual Reality Special Interest Group, Computer Science Department, Rhodes University, Grahamstown, South Africa, June 2004. [PDF] [BibTeX]

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