Dr. Stephen Welstead
SPIE Involvement:
Author | Instructor
Publications (2)

SPIE Press Book | 10 December 1999
KEYWORDS: Image compression, Wavelets, Computer programming, Fractal analysis, Iterated function systems, Wavelet transforms, Tolerancing, Image quality, Image processing, Feature extraction

Proceedings Article | 1 December 1991 Paper
Stephen Welstead, Michael Ward, Christopher Keefer
Proceedings Volume 1565, (1991) https://doi.org/10.1117/12.49800
KEYWORDS: Neural networks, Signal processing, Evolutionary algorithms, Optical signal processing, Electro optics, Modulation, Broadband telecommunications, Antennas, Phased array optics, Optical correlators

Course Instructor
SC176: Fractal and Wavelet Image Compression Techniques
Image compression techniques are an essential part of applications that operate across the Internet. This course examines the mathematics of fractal and wavelet image compression, with an emphasis on computer examples to illustrate the performance of different compression schemes. With the text, students will have access to the Windows software used in the course.
SC1070: Radar Waveforms and Signal Processing
This course provides an introduction to the waveforms and signal processing techniques used in modern pulse radars. Emphasis will be on wideband waveforms. Discussion will include the role of both hardware and software in implementing the processing algorithms. Topics include: linear frequency modulated (LFM) waveforms; phase and frequency coded waveforms; pulse compression techniques; point spread function; doppler effects; ambiguity function; range resolution and bandwidth; waveform orthogonality and diversity; multiple-input, multiple-output (MIMO) processing; synthetic wideband techniques; range-doppler imaging. Examples from a high-fidelity simulation will illustrate the results.
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