Analysis of planar light fields from homogeneous convex curved surfaces under distant illumination

Ravi Ramamoorthi; Patrick Hanrahan

doi:10.1117/12.429498

8 June 2001 Analysis of planar light fields from homogeneous convex curved surfaces under distant illumination

Ravi Ramamoorthi, Patrick Hanrahan

Proceedings Volume 4299, Human Vision and Electronic Imaging VI; (2001) https://doi.org/10.1117/12.429498
Event: Photonics West 2001 - Electronic Imaging, 2001, San Jose, CA, United States

Abstract

We consider the flatland or 2D properties of the light field generated when a homogeneous convex curved surface reflects a distant illumination field. Besides being of considerable theoretical interest, this problem has applications in computer vision and graphics - for instance, in determining lighting and bidirectional reflectance distribution functions (BRDFs), in rendering environment maps, and in image-based rendering. We demonstrate that the integral for the reflected light transforms to a simple product of coefficients in Fourier space. Thus, the operation of rendering can be viewed in simple signal processing terms as a filtering operation that convolves the incident illumination with the BRDF. This analysis leads to a number of interesting observations for computer graphics, computer vision, and visual perception.

Citation Download Citation

Ravi Ramamoorthi and Patrick Hanrahan "Analysis of planar light fields from homogeneous convex curved surfaces under distant illumination", Proc. SPIE 4299, Human Vision and Electronic Imaging VI, (8 June 2001); https://doi.org/10.1117/12.429498

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