Problems of the realistic image synthesis in media with a gradient index of refraction

Andrey Zhdanov; Dmitry Zhdanov; Vadim Sokolov; Igor S. Potemin; Sergey Ershov; Vladimir Galaktionov

doi:10.1117/12.2574159

10 October 2020 Problems of the realistic image synthesis in media with a gradient index of refraction

Andrey Zhdanov, Dmitry Zhdanov, Vadim Sokolov, Igor S. Potemin, Sergey Ershov, Vladimir Galaktionov

Proceedings Volume 11548, Optical Design and Testing X; 115480W (2020) https://doi.org/10.1117/12.2574159
Event: SPIE/COS Photonics Asia, 2020, Online Only

Abstract

The authors present the raytracing-based method of the realistic image synthesis of the three-dimensional scenes with a complex environment containing gradient media. The proposed solution is based on the Runge-Kutta method and allows us to translate a ray to the specified distance in the free space with a gradient medium. The main specificity of the solution is the raytracing inside the medium with the complex boundary, including thousands (and sometimes millions) of geometry elements. So, an efficient way to find a ray intersection with the medium boundary becomes a serious problem. The authors designed an efficient solution for the construction of the adaptive geometry hierarchy which allows splitting the complex boundaries to the voxels with the reduced number of geometry elements and providing the fast raytracing procedure inside of the voxel. Special program interfaces to integrate the raytracing solutions to the rendering system were designed and realistic images of the scenes with gradient media were rendered. Moreover, the authors considered possible solutions for calculation of the luminance components inside of the medium with a gradient index of refraction. The investigation showed that the most efficient way of the luminance calculation is stochastic bidirectional ray tracing with a pair of photon maps. Realistic images of the scenes containing media with a gradient index of refraction were rendered.

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Citation Download Citation

Andrey Zhdanov, Dmitry Zhdanov, Vadim Sokolov, Igor S. Potemin, Sergey Ershov, and Vladimir Galaktionov "Problems of the realistic image synthesis in media with a gradient index of refraction", Proc. SPIE 11548, Optical Design and Testing X, 115480W (10 October 2020); https://doi.org/10.1117/12.2574159

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