Subsurface scattering and light transport in volumetric media are critical to achieve a realistic depiction of a material. We describe several analytical approximations and methods for volumetric light transport in media of various optical properties that are efficient and easy to compute. Most natural materials exhibit a sudden surge in brightness called the opposition effect around the zero p...

Large interactive display systems are becoming increasingly pervasive, but most have been studied in isolation, rather than in the context of other technologies in the environment. We present an in-depth field evaluation of large interactive displays within a multi-display work environment used in the NASA Mars Exploration Rover (MER) missions, a complex and authentic use setting. We uncover ho...

Two experiments examined whether different levels of motor and visual experience influence action perception and whether this effect depends on the type of perceptual task. Within an action recognition task (Experiment 1), professional basketball players and novice college students were asked to identify basketball dribbles from point-light displays. Results showed faster reaction times and gre...

Similarly a simplistic reconstruction procedure can lead to inaccuracies in the relative alignment of the data from each DICOM image in the reconstructed volume, resulting in the dislocation of small structures. Conclusion: The reconstruction method described here generates matched and merged volumetric datasets well suited to the application of automatic image processing and analysis techniques.

Volumetric registration of brain MR images presents a challenging problem due to the wide variety of sulcal folding patterns. We present a novel volumetric registration method based on an intermediate parameter space in which the shape differences are normalized. First, we generate a 3D harmonic map of each brain volume to unit ball which is used as an intermediate space. Cortical surface featu...

This paper advocates a novel material-aware feature descriptor for volumetric image registration. We rigorously formulate a novel probability density function (PDF) based distance metric to devise a compact local feature descriptor supporting invariance of full 3D orientation and isometric deformation. The central idea is to employ anisotropic heat diffusion to characterize the detected local v...

In this study, we propose and experimentally demonstrate a volumetric display system based on quantum dots (QDs) embedded in a polymer substrate. Unlike conventional volumetric displays, our system does not require electrical wiring; thus, the heretofore unavoidable issue of occlusion is resolved because irradiation by external light supplies the energy to the light-emitting voxels formed by th...

In this work, we propose architectures that enable increased realism in volume rendering. The real world is a complex environment with complex illumination. We feel that a volumetric representation is ideal for many applications and that compelling realism is possible using advanced rendering algorithms. This work attacks the problem of increasing realism on several fronts. We present algorithm...

We introduce adaptive volumetric shadow maps (AVSM), a real-time shadow algorithm that supports high-quality shadowing from dynamic volumetric media such as hair and smoke. The key contribution of AVSM is the introduction of a streaming simplification algorithm that generates an accurate volumetric light attenuation function using a small fixed memory footprint. This compression strategy leads ...

Electronic structure calculations at macroscopic scales are employed to investigate the crucial role of a defect-core in the energetics of vacancies in aluminum. We find that vacancy core-energy is significantly influenced by the state of deformation at the vacancy-core, especially volumetric strains. Insights from the core electronic structure and computed displacement fields show that this de...