Robert L. Ewing

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—A combined spatial-and temporal-domain wavelet shrinkage algorithm for video denoising is presented in this paper. The spatial-domain denoising technique is a selective wavelet shrinkage method which uses a two-threshold criteria to exploit the geometry of the wavelet subbands of each video frame, and each frame of the image sequence is spatially denoised(More)
A selective wavelet shrinkage algorithm for digital image denoising is presented. The performance of this method is an improvement upon other methods proposed in the literature and is algorithmically simple for large computational savings. The improved performance and computational speed of the proposed wavelet shrinkage algorithm is presented and(More)
An olfaction detection spiking neural network that detects binary odor patterns is analyzed and implemented. This paper presents a new method for inhibiting spiking neural networks by modulating a detection threshold. Interference noise from active odors is measured by a single inhibitory neuron. The inhibition neuron changes the detection threshold to(More)
Image registration is an essential step in many image processing applications that need visual information from multiple images for comparison, integration, or analysis. Recently, researchers have introduced image registration techniques using the log-polar transform (LPT) for its rotation and scale invariant properties. However, it suffers from nonuniform(More)
—We present a novel visual tracking method for measuring the speed of a moving vehicle within a struc-tured environment using stationary stereo cameras. In the proposed method, visual stereo tracking and motion estimation in 3-D are integrated within the framework of particle filtering. The visual tracking processes in the two views are coupled with each(More)
Goossens defined structural operational semantics for a subset of VHDL-87 and proved that the parallelism present in VHDL is benign. We extend this work to include VHDL-93 features such as shared variables and postponed processes that change the underlying semantic model. In the presence of shared variables, non-deterministic execution of VHDL-93 processes(More)
1 1 Work supported by the State of Ohio DAGSI program and AFRL/Wright Labs. ABSTRACT In 2002 it is estimated that circuits will have a complexity of 150 million transistors and require as many as 1,000 design engineers. As a result, technology is mandating the need both for collaborative design and for multidisciplinary design skills. We describe here a(More)
This paper proposes a rotation and scale invariant object recognition method which combines image feature extraction in Cartesian coordinate with the log-polar mapping and similarity measure techniques for classification. The method yields robustness for fast computation without any rescale needed in the target image. The method also does not use motion(More)
Novel organic transistors utilizing acid/alkaline chemistry have been investigated for their unique device chemistry and customizability. The research presented here shows a multiphysics model for a polymer-electrolyte transistor (PET) simulated in COMSOL Multiphysics. Dynamic transient response and current-voltage characteristics are determined from(More)