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Image Processing and
Signal Processing
Applied Technology for
Science, Engineering
and Business

Low-Level Signal / Image Processing and Analysis

My interest in signal/image processing originated while working on image quality and display issues at NYU Medical Center. This led me to Computer Science at the Univ. of Utah, considering its reputation in this arena (e.g., Tom Stockham), and of course in computer graphics. Along with my later work in medical imaging, volume data fusion, and visualization, I gained substantial experience in practical application of signal processing, from 1D (e.g., audio, seismic sensor data), to 2D (e.g., medical images, photography) to 3D (e.g., medical volume data, 3D visualization).

Research and development in low-level image processing for HP Labs, Technology Initiatives. Developed a product for automated image analysis, content understanding, segmentation, and modification (nondisclosure prohibits more detail). 2007-2010

Developed a product to automatically generate 2D/3D visualizations of earthquake ground motion from arbitarary seismic sensor data, for the Univ. of Washington, Incorporated Research Institutions for Seismology (IRIS). This required numerous signal processing steps, including bandpass filtering, normalization for instrument sensitivity/nonlinearity, analysis to remove extreme/errant data, nonlinear scaling, compression, clipping, and appropriate sampling along the way. 2007-2008

Developed several medical imaging products for RAHD Oncology Products. These required precise low-level pixel and voxel data analysis and considerations such as point-based vs connection-based data (and how these apply to calculations), colormaps and visual perception (e.g., pseudo color bands and data artificially enhanced or lost), mapping 3D data to 2D surfaces, regular vs irregular data grids vs fully irregular data and resulting interpolation. 1995-2006

Codeveloped a 3D volume fusion product with colleagues at NYU Medical Center and the Karolinska and KTH in Sweden. This required detailed low-level data analysis and considerations such as coordinate transforms (e.g., rigid body, affine, 1st/2nd order polynomial warp), mapping between regular and irregular data grids, and creating a graphics display program for fast 2D/3D image interaction via low level graphics operations and color map manipulations. 1999-current

Developed methods to optimize medical imaging quality from video displays, especially digital film writers, at New York Univ. Medical Center, Radiology Dept., involving substantial research, testing, and collaboration with film writer manufacturers. Required investigation into iissues with the point spread functions of the CRT, optics, and film, and their interaction with the nonlinear film response regions. 1977-1980

Research in digital enhancement of radiographs, including design and development of an image digitizer and digital film writer, at the Univ. of Utah, Medical Physics Dept. In depth studies in signal processing, image processing, and computer graphics at the Computer Science Dept., writing a wide range of low level software for those applications. Researched color spaces and developed a method of gamma correcting color video monitors. 1981-1983

Researched methods of image database management, spurred by a CIA-funded project at the Univ. of Utah, Computer Science Dept. 1983

To learn more, see selections under Signal / Image Analysis at left.

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