Because ray tracing acceleration techniques diier in their relative eeciency from scene to scene, no single technique can be optimal in all circumstances. This has lead researchers to develop hybrid algorithms that combine two or more distinct techniques into one. In this paper we describe a generalization of this idea, the meta-hierarchy, which arises from a procedural encapsulation of acceler...

In the last decade ray tracing performance reached interactive frame rates for nontrivial scenes, which roused the desire to also ray trace dynamic scenes. Changing the geometry of a scene, however, invalidates the precomputed auxiliary data-structures needed to accelerate ray tracing. In this thesis we review and discuss several approaches to deal with the challenge of ray tracing dynamic scen...

The latest advancements in computer graphics architectures, as the replacement of some fixed stages of the pipeline for programmable stages (shaders), have been enabling the development of parallel general purpose applications on massively parallel graphics architectures (Streaming Processors). For years the graphics processing unit (GPU) is being optimized for increasingly high throughput of m...

A very simple method of sagittal focusing of X-ray synchrotron radiation is presented. A special ray-tracing program which utilizes the diffraction-refraction effect is developed. It is demonstrated both by ray-tracing simulations and by an experiment whereby a reasonably good sagittal concentration of 8 keV synchrotron radiation may be achieved by diffraction on the walls of a cylindrical hole...

Ray tracing is a method of rendering high-quality images and video by calculating what happens to virtual light rays in a 3-dimensional scene. It is capable of creating far more realism than traditional Z-buffering methods. This paper describes the design of a hardware ray tracing system implemented on a multi-FPGA Xilinx Virtex-E prototyping system. The result is a hardware ray tracer that is ...

The main purpose of this paper is to introduce 3D integral imaging interpolation method, to overcome the 3D missing information problem occurred between cylindrical lenses (micro-images) due to occluded areas in the previous cylindrical lens, new cylindrical lens shows an area, to generate one single photo-realistic 3D integral imaging frame. The method is based on a Multiprocessor ray-tracer c...

We present a cache-based approach to handling the difficult problem of performing visually acceptable texture resampling/filtering while ray-tracing. While many good methods have been proposed to handle the error introduced by the ray-tracing algorithm when sampling in screen space, handling this error in texture space has been less adequately addressed. Our solution is to introduce the Convolu...

Camera simulation aims to enhance realistic rendering, lens design and augmented reality by accurately simulating geometrical optics. Here our work focuses on optical phenomena, such as depth of field, monochromatic aberration, distortion, and aperture exposure, that are based on real camera lens architecture. Our approach is modeling pixel equation using ray tracing algorithm to render scenes ...

The realm of mixed reality applications lies in blending rendered images with images of the real world. This requires highly realistic rendered images in order to seamlessly blend between those two worlds. However, current rasterization technology severely limits the achievable realism and imposes strict limits on the scene complexity and the optical effects that can be simulated efficiently. R...

Visualizing surfaces of functions of two variables by ray tracing generally follows the techniques which have been developed for ray tracing any other surfaces. But with regard to the special features of this type of surface and the fact that, in this case, the ‘scene’ to be ray-traced normally consists of only one single object, a special ray-tracing algorithm has been developed by several aut...