I am a Newton Fellow in the Department of Physics and Astronomy at University College London (UCL) and a Core Team member of the ESA Planck satellite mission. Previously, I was a Postdoctoral Researcher in the Electrical Engineering Institute at Ecole Polytechnique Federale de Lausanne (EPFL). Before that I was a Research Fellow of Clare College, Cambridge, affiliated with the Astrophysics Group of the Physics Department (the Cavendish) at the University of Cambridge.
My research is concerned with signal processing on the sphere, including sampling theorems, wavelets, optimal filtering, and compressed sensing. I am particularly interested in applications of these theories to problems in astrophysics, particularly in cosmology and radio interferometry. Please see my research or publications pages for more information.
News
- [May 2012] Paper submitted on Exact wavelets on the ball. More »
- [May 2012] Presented talk at ADA 7 on Implications of a new sampling theorem for sparse signal reconstruction on the sphere. More »
- [May 2012] Paper submitted on Sparsity Averaging Reweighted Analysis (SARA): a novel algorithm for radio-interferometric imaging. More »
- [May 2012] Paper submitted on Sparse signal reconstruction on the sphere: implications of a new sampling theorem. More »
- [March 2012] Presented talk at Signal Processing for the Physical Sciences Royal Society meeting on Spherical signal processing for cosmology. More »
- [March 2012] Presented talk at 47th Rencontres de Moriond on Detecting cosmic bubble collisions with optimal filters. More »
- [February 2012] Paper submitted on Optimal filters for detecting cosmic bubble collisions. More »
- [January 2012] Uptaken position as a Newton International Fellow at UCL.
- [January 2012] Presented talk at IFCA seminar on Spherical signal processing and the Multiverse. More »
- [January 2012] Presented talk at EPFL BASP seminar on Sampling theorems and compressed sensing on the sphere. More »
- [October 2011] Spin spherical harmonic transform package SSHT available for download! Includes Matlab, C and Fortran interfaces. More »
- [October 2011] Paper accepted for publication on A novel sampling theorem on the sphere. More »
- [October 2011] Conference paper available for Wavelets and Sparsity XIV on Sampling theorems and compressive sensing on the sphere. More »
- [October 2011] Conference paper available for ICIP 2011 on Compressed sensing for radio interferometric imaging: review and future direction. More »
- [October 2011] Presented talk at UCL astrophysics seminar on Spherical signal processing for cosmology. More »
- [September 2011] Started new position at UCL as a Leverhulme Early Career Fellow.
- [September 2011] Presented talk at ICIP 2011 on
Compressed sensing for radio interferometric imaging: review and
future direction.
More » - [September 2011] Presented talk at BASP Frontiers on A novel sampling theorem on the sphere with implications for compressive sensing. More »
- [September 2011] Presented talk at BASP Frontiers on
Radio interferometric imaging with compressed sensing.
More » - [August 2011] Conference paper available for URSI GASS 2011 on Intrinsic advantages of the w component and spherical imaging for wide-field radio interferometry. More »
- [August 2011] Talk from URSI GASS 2011 on Intrinsic advantages of the w component and spherical imaging for wide-field radio interferometry available. More »
- [August 2011] Presented CaSP seminar at Victoria University
on Signal processing on the sphere and
applications.
More » - [August 2011] Visiting Researcher at Victoria University.
- [August 2011] SZIP executables for compressing data on the sphere released! Get software »
- [July 2011] Paper published on Data compression on the sphere. More »
- [June 2011] Conference paper available for SPARS 2011 on Implications for compressed sensing of a new sampling theorem on the sphere. More »
- [May 2011] Conference paper available for ISMRM 2011 on Harmonic analysis of spherical sampling in diffusion MRI. More »
- [May 2011] Paper published on Fast, exact (but unstable) spin spherical harmonic transforms. More »
- [April 2011] Awarded Young Scientist Award for URSI GASS 2011.
- [April 2011] Conference paper accepted for SPARS 2011 on Implications for compressed sensing of a new sampling theorem on the sphere. More »
- [April 2011] Conference paper accepted for ICIP 2011 on Compressed sensing for radio interferometric imaging: review and future direction. More »
- [April 2011] Added descriptions of projects on offer for the next academic year. More »
- [April 2011] Conference paper accepted for URSI GASS 2011 on Intrinsic advantages of the w component and spherical imaging for wide-field radio interferometry. More »
- [January 2011] Conference paper accepted for ISMRM 2011 on Harmonic analysis of spherical sampling in diffusion MRI. More »
- [December 2010] Paper accepted for publication on Compressed sensing for wide-field radio interferometric imaging. More »
- [November 2010] Presented guest lecture for Advanced Signal Processing at EPFL on Wavelets on the sphere and cosmological applications. More »
- [October 2010] Paper submitted on Compressed sensing for wide-field radio interferometric imaging. More »
- [September 2010] Presented Cavendish astrophysics seminar on Simulating full-sky interferometric observations using wavelets. More »
- [September 2010] Webpage updated.
- [August 2010] Paper submitted by Pascal Audet using FastCSWT code for Planetary Geophysics. More »
- [August 2010] Presented talk at CALIM 2010 on Compressed sensing for radio interferometric imaging on wide fields of view. More »
- [June 2010] Returned to academia! After an interesting two years in finance, I've recently taken up a postdoc at EPFL to work with Pierre Vandergheynst and Yves Wiaux, primarily on compressed sensing and radio interferometry.
- [December 2008] Steerable scale discretised wavelets on the sphere (S2DW) code available for download. Get software »
- [June 2008] More software available for download, including fast wavelet code. Get software »
- [April 2008] WMAP Morlet wavelet localised non-Gaussian region maps available for download. More »
- [December 2007] Brief description of current research topics added. More »
- [May 2006] Bianchi page added with template maps available for download. More »
- [February 2006] I have been consulting for Geomerics where we have developed fast spherical wavelet lighting solutions. More »
- [October 2005] First software available! Get software »