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http://dx.doi.org/10.9717/kmms.2012.15.11.1399

Generating Dynamic Virtual Light Sources by Interpolating HDR Environment Maps  

Hwang, Gyuhyun (동국대학교 멀티미디어학과)
Park, Sanghun (동국대학교 멀티미디어학과)
Publication Information
Journal of Korea Multimedia Society / v.15, no.11, 2012 , pp. 1399-1408 More about this Journal
Abstract
The light source is an important visual component that empirically affects the color and illumination of graphic objects, and it is necessary to precisely store and appropriately employ the information of all light sources in the real world in order to obtain photo-realistic composition results. The information of real light sources can be accurately stored in HDR environment maps; however, it is impossible to create new environment maps corresponding to dynamic virtual light sources from a single HDR environment map captured under a fixed lighting situation. In this paper, we present a technique to dynamically generate well-matched information for arbitrarily selected virtual light sources using HDR environment maps created under predefined lighting position and orientation. Using the information obtained from light intensity and distribution analysis, our technique automatically generates HDR environment maps for virtual light sources via image interpolation. By applying the interpolated environment maps to an image-based lighting technique, we show that virtual light can create photo-realistically rendered images for graphic models.
Keywords
Image-Based Lighting; Dynamic Lighting; HDR Environment Maps; HDR Interpolation;
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Times Cited By KSCI : 1  (Citation Analysis)
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