In the real world we usually have to rely upon what we can observe about our environment in order to judge our current state. Unfortunately our observations are inherently limited, and this can sometimes cause us to become confused and disorientated, losing track of exactly what state we are in. This confusion is called perceptual aliasing, and it occurs when our observations are not descriptiv...

Arclight, a global illumination lightmap tool based on a texture-space modification of the Photon Mapping algorithm, is developed. A means of achieving distortion free lightmapping is devised by reversing the perspective correct texture transform. Unbiased Monte-Carlo and biased Quasi Monte-Carlo methods are used for evaluation of the General Rendering Equation. The application achieves computa...

Procedural shaders are a vital part of modern rendering systems. Despite their prevalence, however, procedural shaders remain sensitive to aliasing any time they are sampled at a rate below the Nyquist limit. Antialiasing is typically achieved through numerical techniques like supersampling or precomputing integrals stored in mipmaps. This paper explores the problem of analytically computing a ...

Most large-area video projection systems offer only limited spacial resolution. Consequently, images of detailed scenery cannot be displayed at full fidelity. A possible but significantly more costly strategy is a tiled projection display. If this solution is not feasible then either aliasing occurs or some anti-aliasing method is used at the cost of reduced scene quality. In this paper we desc...

Theoretically, the Delft approach of surface-related multiple eliminationcan be applied in three dimension, as long as the sourceand receiver coverage is dense enough. In reality, such a dense coverage is still far from reach, using the available multi-streamer acquisition system. One way to fill the gap is to massively interpolate the missing sources and receivers in the survey, which requires...

Light field rendering has been proposed to render novel images from a collection of captured images without explicit geometry information. In this report, we present an optical analysis of light field rendering. In particular, a light field rendering system can be considered as a virtual imaging system with a discrete synthetic aperture (e.g., [10]. We define the key elements of the virtual ima...

Subpixel rendering increases the apparent display resolution by taking into account the subpixel structure of a given display. In essence, each subpixel is addressed individually, allowing the underlying signal to be sampled more densely. Unfortunately, naïve subpixel sampling introduces color aliasing, as each subpixel only displays a specific color (usually R, G, and B subpixels are used). As...

This paper proposes a new shadow map technique termed trapezoidal shadow maps to calculate high quality shadows in real-time applications. To address the resolution problem of the standard shadow map approach, our technique approximates the eye’s frustum as seen from the light with a trapezoid to warp it onto a shadow map. Such a trapezoidal approximation, which may first seem straightforward, ...

In this paper we present a novel image based algorithm to render visually plausible anti-aliased soft shadows in a robust and efficient manner. To achieve both high visual quality and high performance, it employs an accurate shadow map filtering method which guarantees smooth penumbrae and high quality anisotropic anti-aliasing of the sharp transitions. Unlike approaches based on pre-filtering ...

Introduction In recent several years, processor speeds have improved dramatically. This drastic increase in processor speeds makes a cache with a very fast hit time a must for high performance computer systems. The above trends make the use of direct-mapped virtual caches very attractive since they inherit the hit time advantage from both types (i.e., direct-mapped and virtual) of caches. Howev...