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Pixon-based image reconstruction (contours) of the 60 micron IRAS survey scans overlaid on false color, blue light image of M51, the Whirlpool galaxy. |
Richard C. Puetter
Research Physicist
Center for Astrophysics & Space Sciences, UCSD
Professional Interests:
- Active galaxies and QSOs
- Infrared instrumentation
- Radiative transfer
- Image Reconstruction
- Bayesian Estimation
- Computational Physics
Education/Employment
:- BA, Physics, University of Chicago 1974
- Ph.D., Physics, University of California, San Diego 1980
- Research Physicist, University of California, San Diego 1980-Present
- Managing Director . E-mail: info@pixon.com
Recent Work
:- Active Galaxies and QSOs
- Built (with Barbara Jones, Co-PI) the UCSD/Keck Long Wavelength Spectrometer (LWS)
- Image Processing -- Pixon method image reconstruction (see below)
Pixon Method Image Reconstruction
:The Pixon method is a high performance image reconstruction method developed by R. Pina and R. Puetter at UCSD in 1992/93 and accelerated in computational speed by Yahil and Puetter in 1996/97. In extensive tests it has been shown to consistently out perform all methods, being both superior in image reconstruction performance (better resolution and faint source sensitivity) and being computationally much faster (order of magnitude, or more, faster than other non-linear methods). In addition, we have now developed a
"Quick Pixon" method which has performance rivaling the full Pixon method for many applications. The Quick Pixon method is very fast, having computational times in the same class as linear methods (e.g. Wiener Filtered Fourier deconvolution). With special purpose hardware, the Quick Pixon method will be able to perform Pixon method reconstructions of modest sized images (512x512 pixels) at video rates (30 Hz). A general reference page for Pixon method related technology can be found here.The University of California has patented (US Patent No. 5,912,993) and is in the process of patenting additional aspects of the Pixon method. For a description of the method, practical examples of applications of the method, and discussion of the theory, see papers listed in the Publications section, below and on the
Pixon LLC website. The University has licensed the Pixon technology exclusively to Pixon LLC which is actively seeking companies interested in licensing this technology. Parties interested in licensing the technology should contact Pixon LLC (info@pixon.com). Sample images, SUN compressed and PC PK-Zipped version of most of the Pixon method papers listed in my bibliography (below) are also available.Related web sites dealing with the Pixon method can be found at
Tom Metcalf's homepage, dealing primarily with application to Yohkoh satellite hard X-ray imaging, and at UC, Riverside at the High Energy Astrophysics Research group webpage), where Dave Dixon has applied the Pixon method to the analysis of high energy astrophysics imaging data.A website that might be of interest to many people is the
San Diego Supercomputer Center Pixon code download site. At this location, interested parties can download free Pixon method software for private, non-commercial scientific use. Faster, more capable, commercial code can be obtained from Pixon LLC. A brief description of the Pixon Technology offered by Pixon LLC can be found here.Other Interests
:- Nutritional Biochemistry (see
vitamin.pdf).
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