Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 21 for “"Global Illumination"”.
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Parallel hierarchical global illumination
<p>Solving the global illumination problem is equivalent to determining the intensity of every wavelength of light in all directions at every point in a given scene. The complexity of the problem has led researchers to use approximation methods for solving the problem on serial computers. Rather …
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Importance Resampling for Global Illumination
This thesis develops a generalized form of Monte Carlo integration called Resampled Importance Sampling. It is based on the importance resampling sample generation technique. Resampled Importance Sampling can lead to significant variance reduction over standard Monte Carlo integration for common …
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IMPROVING GLOBAL ILLUMINATION WITH A-BUFFER TECHNIQUE
Two of the main issues m radiosity generated images are efficient form factor computation and proper mesh generation. Although hemicube algorithm remains a simple and fast method for radiosity form factor computation, its simple sampling scheme for the hemicube pixels causes unacceptable accuracy …
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Sampling Methods in Ray-Based Global Illumination
… light transport are collectively known as Global Illumination methods. The most versatile of these are based on ray tracing (following ray paths through a scene), and numerical integration using random or quasi-random sampling. While ray tracing and sampling methods in global illumination …
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Estimation of Global Illumination using Cycle-Consistent Adversarial Networks
… to generate realistic images and estimate global illumination in real-time, significantly reducing the need for extensive expertise and time investment. Our experiments on the Blender and Portal datasets demonstrate the model's ability to efficiently generate high-quality, globally …
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Vector occluders: an empirical approximation for rendering global illumination effects in real-time
… has been previously used as a means to get global illumination effects in real-time on consumer hardware of the day. Our work uses Sloan’s 2002 PRT method as a starting point, and builds on it with two new ideas. We first explore an alternative representation for PRT data. “Cpherical …
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Physically based lighting calculations for computer graphics
… Previous and new solution techniques for the global illumination are discussed in the context of this formulation.
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Textured Hierarchical Precomputed Radiance Transfer
Computing complex lighting simulations such as global illumination is a computationally intensive task. Various real time solutions exist to approximate aspects of global illumination such as shadows, however, few of these methods offer single pass rendering solutions for soft shadows (self and …
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Point-Based Color Bleeding with Volumes
… Achieving realistic or believable global illumination in scenes with</p> <p>participating media is exponentially more expensive compared to our traditional</p> <p>polygonal methods. Light interacts with the particles of a volume, creating com-</p> <p>plex radiance patterns.</p> …
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View-dependent precomputed light transport using non-linear Gaussian function approximations
… light transport approaches can render rich global illumination effects, but high-frequency view-dependent effects such as sharp highlights remain a challenge. We introduce a new representation of the light transport operator based on sums of Gaussians. The non-linear parameters of the …
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The Area Sampling Machine
… it becomes possible to dramatically speedup global illumination renderers while at the same time achieving low cost.
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Perspective-Driven Radiosity on Graphics Hardware
Radiosity is a global illumination algorithm used by artists, architects, and engineers for its realistic simulation of lighting. Since the illumination model is global, complexity and run time grow as larger environments are provided. Algorithms exist which generate an incremental result and …
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Bayesian approaches to bilinear inverse problems involving spatial evidence : color constancy and blind image deconvolution
… goal of the former is to separate the effect of global illumination from other properties of an observed image, in order to reproduce the effect of observing a scene under purely white light. For the latter, we consider the specific instance of deblurring, in which we seek to separate the effect …
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Optimized ray tracing for real time use without hardware accelerators
… in pursuit of this goal, one which simulated global illumination but could not maintain reasonable levels of accuracy, and another which simulated lighting, shadows, and reflections and produced images which closely resembled our reference model while achieving consistent real time frame rates.
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GPU-Accelerated Point-Based Color Bleeding
<p>Traditional global illumination lighting techniques like Radiosity and Monte Carlo sampling are computationally expensive. This has prompted the development of the Point-Based Color Bleeding (PBCB) algorithm by Pixar in order to approximate complex indirect illumination while meeting the demands …
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Speculative ray scheduling for large data visualization on supercomputers
… rays through partitioned data to calculate global illumination is inefficient because of the I/O overhead incurred by rays migrating from one partition to another. For such data, ray scheduling methods have demonstrated improved rendering performance by amortizing costs across a large group …
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Machine Learning for 3D Visualisation Using Generative Models
… which can be directed to generate realistic global illumination effects, by using a semi-supervised GANs model (Pix2pix) that is comprised of PatchGAN and conditional GAN which is then accompanied by a U-Net structure. Pix2pix had been chosen for this thesis for its ability for training as …
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Machine Learning for 3D Visualisation Using Generative Models
… which can be directed to generate realistic global illumination effects, by using a semi-supervised GANs model (Pix2pix) that is comprised of PatchGAN and conditional GAN which is then accompanied by a U-Net structure. Pix2pix had been chosen for this thesis for its ability for training as …
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Validated interactive daylighting analysis for architectural design
The conventional approach to predicting interior illumination and visual discomfort in buildings is to run a ray tracing simulation with high accuracy settings, wait while the simulation processes, and repeat as necessary with modifications to the scene and settings. This workflow lacks …
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Shape, Reflectance, and Illumination From Appearance
… estimating shape, material properties, and/or illumination passively from the object’s appearance. Such “inverse rendering” capabilities enable 3D understanding of our world (as desired in autonomous driving, robotics, etc.) and computer graphics applications such as relighting, view synthesis, …
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