Gary A. Sitton

Expertise

• 3D and 2D computer graphics and image processing, digital medical image processing, image enhancement & compression.

• Digital signal processing, 3-D data analysis, adaptive filtering, and frequency-time analysis.  Mathematical modeling and optimization, simulated annealing, neural networks, linear algebra, and ill-conditioned least squares problems.

• Efficient  FFT algorithms, FIR and IIR filter design.  Wavelet transforms for time varying signal analysis and signal representation. Sigma delta A/D encoding methods and theory.

Employment History

• 1989 to present: Senior Research Geophysicist on the R&D staff at Western Geophysical. Currently working on digital signal processing problems for geophysical data acquisition systems using adaptive filtering, frequency-time analysis, lossy and loss-less data compression, signal inversion, and neural network technology.

•  1988 to 1989: Senior software engineer at Positron Corporation. Had responsibility for image reconstruction and processing on a commercial positron emission tomography (PET) system, Posicam.  Supplied primary expertise in graphics, and 2D and 3D signal processing and enhancement.

• 1986 to 1988: Development engineer at Input/Output, Inc. Design and software implementation of real-time seismic DSP algorithms.  Designed a frequency domain correlator algorithm.  Supported numerical analysis and sigma delta modeling problems.

• 1984 to 1986: Technical consultant in time series analysis, numerical analysis, hardware design and programming for Geosource, Inc.  Designed and implemented high speed real-time data rasterizer and interpolator for a seismic laser camera.

• 1980 to 1983: Software engineer at Daniel Industries, Inc.  Designed and implemented hand-held computer software for communication with a gas flow computer and digital gas chromatograph real-time analysis and peak detection system.  Also was general staff consultant in numerical analysis. 

• 1971 to 1980: Electronics/software engineer at Baylor College of Medicine. Complete electronic and program design of a microprocessor controlled portable multi-parameter vision tester. Design and analysis of several psychophysical tests using Monte Carlo techniques. Implemented a real-time data compression algorithm (AZTEC).  Design and implementation of PL/I dialectic subset language (PL/EXUS) using XPL compiler generator system. 

• 1970 to 1971: Scientific programmer at the IBM Scientific Center.  Programmed and designed scan-converted video I/O systems including disk backing store system for general digital image processing, formulated and implemented image processing algorithms for medical and synoptic images. 

Academic Background

B.S. in Physics (Math minor), University of Houston 1966.

M.S. in Electrical Engineering (Computer Science minor), Rice University 1970. 

 Professional Affiliations

Senior Member of the IEEE ( since 1991).

 Publication List

 1) "The Rice Digital Seismograph System," (with J. Cl. De-bremaecker et al) Journal of Geophysical Research, Vol. 68, No. 17, September 1963.

2) "Note on Some Problems in Geophysical Data Acquisition on Magnetic Tape," (with J. Cl. DeBremaecker et al), IEEE Trans. on      Geos. Elec., Vol. GE 3, No. 1, June 1965. 

3) "Deconvolution and Autoregression," (with J. Cl. DeBremaecker) Geophysics, Vol. 30, No. 6, p. 1231 (Abstract), December 1965. 

4) "Linguistic Segmentation of Acoustic Waveforms," (with H. Resnikoff), AEC Report ORO 2572/15, and Jour. Acous. Soc. of America, Vol. 44, No. 1, p. 366 (Abstract), July 1968. 

5) "A New Type of Hearing Aid," (with H. Resnikoff), The Rice Review, November 1968.

 6) "Acoustic Segmentation of Speech," International Journal of Man-Machine Studies, Vol. 2, No. 1, February 1970. 

7) "Operations on Generalized Arrays with the Genie Compiler," Comm. of the ACM, Vol. 13, No. 5, May 1970. 

8) "Computer Synthesis of Virtual Spectral Filters," (with P. Tobias), SID Digest of Technical Papers, Proc. SID 1971 Int. Symp. and Exp., May 1971.

9) "Direct Technique for Improving a Matrix Inverse," IBM Jour. of Res. and Dev., Vol. 15, No. 5, September 1971. 

10) "The PL/EXUS Language and Virtual Machine," (with T. Kendricks), Proc. ACM-IEEE Symp. on High Level Language Computer Architecture, November 7-8, 1973. 

11) "Hardware Implementations of the AZTEC Data Acquisition Algorithm," (with D. Glaeser), Proc. of the San Diego Biomedical Symp., February 1976. 

12) "Program Finds 8-by-16 Product Fast," Electronics, Vol. 52, No. 6, March 1979. 

13) "The Baylor Video Acuity Tester," (with T. Decker et al) Archives of Ophthalmology, Vol. 99, No. 11, November 1981.

14) "A Collection of Functions for the TMS320C30," (Panos Papamichalis editor), Digital Signal Processing with the TMS320 Family, Vol. 3, Prentice-Hall, Englewood Cliffs NJ, 1990. 

15) "The Quick Discrete Fourier Transform," (with H. Guo and S. Burrus), Proc. ICASSP Adelaide, Australia, April 1994.

 16) "The Quick Fourier Transform: An FFT Based on Symmetries," (with H. Guo and S. Burrus), IEEE Trans. SP, Vol. 46, No. 2, February, 1998. 

Patents

1) "Method for Seismic Exploration in Arctic Regions," (Co-inventor with F. Barr and D. Nyland, and assigned to Western Atlas Int'l.), U.S. Patent No. 5,408,441, April, 1995. 

2) "Method of Reducing Noise in Seismic Signals by Adaptive Filtering of a Noise Reference," (Co-inventor with R. Chambers and J. Paffenholz, and assigned to Western Atlas Int'l.), U.S. Patent No. 5,572,483, November, 1996.

3) “Method for Compression of High Resolution Seismic Data,”  (Co-inventor with Z. Jericevic, and assigned to Western Atlas Int’l.), U.S. Patent No. 5,757,852, May 26, 1998.

Computer Languages, Operating Systems & Hardware Design

Language proficiencies in C/C++, MATLAB, FORTRAN, PL/I, and assembler (320C30, 56001, 80x86, etc.) under DOS, UNIX, NT and VMS.  Extensive hardware design experience in STTL and CMOS.

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