What Can Image Reconstruction Do for You? 图像重构算法及其在行星科学中的应用

摘要：Image reconstruction techniques offer a cheap and effective software solution to reduce the impact of measurement artefacts in scientific data sets. I will give an overview of the problem that image reconstruction techniques aim to solve, before describing in more detail the Pixon image reconstruction algorithm. This method can produce an improvement in image spatial resolution while decreasing the noise present in the original map. I will illustrate the value of the Pixon algorithm using data from both the omni-directional Lunar Prospector and Mars Odyssey Neutron Spectrometers. The decreased effective detector footprint uncovers significant results that were latent in the raw data. For the Moon, the sharper image shows how the polar hydrogen is on average concentrated into permanently shaded craters. For Mars, regions of significant equatorial hydration are discovered. This type of technique has a multitude of applications to a wide variety of scientific data sets.

报告人简介：Dr. Vincent R. Eke is a reader in the Institute for Computational Cosmology, Department of Physics,
Durham University, UK. He was educated at the University of Cambridge (Physics and Theoretical Physics) and Durham University, receiving a Ph.D. in cosmology in 1996. From 1996 to 1999, he was a postdoc in Oxford University and Cambridge University, and from 1999 to 2001 he was a research associate at Steward Observatory, University of Arizona. From 2001 to 2009, he held a prestigious Royal Society University Research Fellowship at Durham University. Since 2009, he has been working at Durham University as a lecturer, and since 2010 as a reader. His research interests fall into four distinct areas: numerical simulations of the growth of structure in the Universe, the comparison of data from galaxy surveys with numerical models of the galaxy distribution, the application of image reconstruction techniques to a variety of astronomical problems, and analysis of remote sensing data in planetary science. He has published more than 60 papers in international journals, and these papers have been cited over 8000 times. He also serves as a frequent referee for several prestigious international journals, such as Monthly Notices of the Royal Astronomical Society, the Astrophysical Journal, Astronomy & Astrophysics, Icarus and Journal of Geophysical Research-Planets