Global Illumination using Photon Maps

Jensen, Henrik Wann

doi:10.1007/978-3-7091-7484-5_3

Cited by 429 publications

(353 citation statements)

References 18 publications

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“…Consequently, many hybrid techniques combining these two, have been developed over the years to address these issues, particularly Bidirectional Path Tracing (BDPT) [44] [45] and Photon Mapping [46] [47].…”

Section: Stochastic (Monte Carlo) Based Methods -Ray Tracingmentioning

confidence: 99%

State-of-the-art review of solar design tools and methods for assessing daylighting and solar potential for building-integrated photovoltaics

Jakica

2018

Renewable and Sustainable Energy Reviews

138

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Solar design can take many different forms across disciplines with different methodologies and goals, ranging from acquiring architectural visual effects to assessing illumination for daylighting and solar radiation potential on building surfaces for PV implementation. Furthermore, a capability of solar design methodologies and tools to accurately and time efficiently simulate light phenomena can greatly influence performance results and design decisions. This is especially important in complex cases such as dense urban settings with the significant surface shadowing, and vertical facades including daylighting devices and photovoltaics. Consequently, choosing a suitable approach and tool for each design phase is essential for achieving unique design and performance goals. This paper was carried out within the framework of IEA-PVPS Task 15 -BIPV and it aims to facilitate this decision for all parties involved in solar design process. Here presented, is an overview of almost 200 solar design tools, analyzing their numerous features regarding accuracy, complexity, scale, computation speed, representation as well as building design process integration in about 50 2D/3D, CAD/CAM and BIM software environments. Furthermore, tools from various fields have been analysed in a broad interdisciplinary context of solar design with a particular attention for being used for Daylighting and Building-Integrated Photovoltaics (BIPV) purposes. This approach should open many new perspectives on a potentially wider multidisciplinary usage and interpretation of solar design tools, sometimes well beyond their initial scope of work.

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Section: Stochastic (Monte Carlo) Based Methods -Ray Tracingmentioning

confidence: 99%

State-of-the-art review of solar design tools and methods for assessing daylighting and solar potential for building-integrated photovoltaics

Jakica

2018

Renewable and Sustainable Energy Reviews

138

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“…For photon direction encoding, vectors ω are converted to spherical coordinates and represented with 2 bytes [15]. Because the photon energy does not change, only one byte is used to record the color channel of the photon.…”

Section: Specular Photon Tracingmentioning

confidence: 99%

Lattice-Based Volumetric Global Illumination

Qiu

Fan

et al. 2007

IEEE Trans. Visual. Comput. Graphics

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Abstract-We describe a novel volumetric global illumination framework based on the Face-Centered Cubic (FCC) lattice. An FCC lattice has important advantages over a Cartesian lattice. It has higher packing density in the frequency domain, which translates to better sampling efficiency. Furthermore, it has the maximal possible kissing number (equivalent to the number of nearest neighbors of each site), which provides optimal 3D angular discretization among all lattices. We employ a new two-pass (illumination and rendering) global illumination scheme on an FCC lattice. This scheme exploits the angular discretization to greatly simplify the computation in multiple scattering and to minimize illumination information storage. The GPU has been utilized to further accelerate the rendering stage. We demonstrate our new framework with participating media and volume rendering with multiple scattering, where both are significantly faster than traditional techniques with comparable quality.

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“…Wann Jensen has introduced the Photon Map (e.g., [13]), which uses particle or photon tracing for all light transfers including diffuse. His method can quickly compute direct caustics (i.e., caustics caused by a light source directly), but requires a costly gather step to compute other transport paths adequately.…”

Section: Previous Workmentioning

confidence: 99%

“…Specular effects are often high frequency (similar to shadows for example), and thus can require fine meshing to be correctly represented. We will be using the particles to reconstruct irradiance [13,11] arriving at a surface; our goal is to perform hierarchical reconstruction (see Section 4). As a result it is important to appropriately choose the level at which we place particles.…”

Section: Iterativementioning

confidence: 99%