Stephen V. Rice

A Spatial Median Filter for noise removal in digital images

In this paper, six different image filtering algorithms are compared based on their ability to reconstruct noise-affected images. The purpose of these algorithms is to remove noise from a signal that might occur through the transmission of an image. A new algorithm, the spatial median filter, is introduced and compared with current image smoothing techniques. Experimental results demonstrate that the proposed algorithm is comparable to these techniques. A modification to this algorithm is introduced to achieve more accurate reconstructions over other popular techniques.

The SIMSCRIPT III programming language for modular object-oriented simulation

SIMSCRIPT III is a programming language for discrete-event simulation. It is a major extension of its predecessor, SIMSCRIPT II.5, providing full support for object-oriented programming and modular software development.

Resource modeling in discrete: event simulation environments: a fifty-year perspective

Through 50 years of innovation, discrete-event simulation environments have offered similar approaches to modeling the resources that participate in simulations. These approaches involve “clients” and “servers” of varying activity levels that wait in queues of varying sophistication. While powerful enough for many applications, these models limit the complexity of the entities that may be represented. Analysis of more than thirty simulation environments provides the substrate for defining “levels” of modeling features from primitive foundations to advanced embellishment. This analysis not only supports comparison of existing resource models, but also informs the development of new approaches.

Object-oriented SIMSCRIPT

A new object-oriented version of the SIMSCRIPT programming language is under development. Incorporating modules and object classes, the new language is designed for modular, object-oriented simulation programming.

Synthesizing the acoustic Doppler effect in software

We present the theory and implementation of the acoustic Doppler effect in which a sequence of digital audio samples recorded at a sound source is transformed into a sequence of samples to represent the sounds perceived by an observer. The computational model alters the frequencies and amplitude of the original sequence, taking into account the simultaneous effects of a moving source, a moving observer, and a moving medium of propagation. One application is the real-time generation of the sounds of moving objects in a computer game as perceived by players of the game.

An Integrated Environment for Audio Recording, Editing, and Retrieval

FindSounds Palette integrates audio recording, editing, and retrieval with advances in audio visualization and content-based queries of local and remote sound collections. Sound designers, musicians, filmmakers, and game developers require software tools for recording and editing audio, and for searching collections of audio files, including sound effects and musical instrument samples