Kartic Subr

K.Subr@hw.ac.uk.edu (skip the .edu)

+44 131 451 3029

Royal Society Univ. Research Fellow

Associate Professor

Heriot Watt University

School of Engg. & Physical Sciences

Instt. of Sensors, Signals & Systems

WP 2.20, Edinburgh Campus, UK

Bio (reverse chrono)

Redirecting to new website: http://http://home.eps.hw.ac.uk/~ks400/"

Before joining Heriot Watt University, I was a post-doctoral researcher at Disney Research, in Edinburgh. Prior to my position at Disney Research, I was a Royal Society's Newton International Fellow, and an Honorary Research Associate at the dept of Computer Science, University College London. Between 2008 and 2010 I was a post-doc at INRIA-Grenoble, working with Cyril Soler and Nicolas Holzschuch. I obtained my Ph.D. at the University of California, Irvine in June, 2008 under the guidance of Jim Arvo. My dissertation explores the different sampling decisions that are made in Monte Carlo image synthesis and suggests improved techniques in certain contexts. In some previous life, I obtained a Bachelor of Technology degree in Computer Science and Engineering from PESIT (Bangalore University, India), and worked at Hewlett Packard as a Telecommunications engineer for a year.

The first chapter of my dissertation contains a general introduction to Monte Carlo methods and applications in digital image synthesis. I enjoy composing music and taking photographs in my spare time. Feel free to download and use them, but do acknowledge their source with a link to this website. My friends from way back probably know me as S.S. or "With a C".


  • New Sep '14: I have received the University Research Fellowship from the Royal Society.

  • Jul '14: I am looking for PhD students in the area of stochastic sampling and signal processing..

  • Jul '14: Joined EPS, Heriot Watt University , as an associate professor at ISSS.

  • Our paper on error analysis of estimators using combinations of Monte Carlo sampling schemes has been accepted to EGSR 2014
  • Mar '14: Invited speaker at a course (minisymposium) in SIAM's Conference on Uncertainty Quantification (UQ14) .
  • Jul '13: Slides of our SIGGRAPH talks ( stochastic sampling and covariance tracing ) are now available.
  • May 13: Code for our paper at EG2013 on accurate image selection is now available for non-commercial use.
  • Apr 13: Our paper on assessing integrators using stochastic sampling strategies has been accepted to SIGGRAPH 2013
  • Feb 13: Our paper on the use of arbitrary pairwise potentials for inference with fully connected CRFs has been accepted at CVPR 2013
  • Feb 13: Our paper on the analysis of 5D temporal light fields has been accepted to TOG
  • Oct 12: Our journal paper on interactive rendering of acquired materials has been accepted to TVCG.
  • Aug 12: Our paper on stereo reconstruction in low-light conditions has been accepted at CVMP 12.
  • Mar 12: Our paper on rendering acquired materials interactively was selected best-paper-honorable-mention.
  • Dec 11: Our paper on rendering acquired materials interactively was accepted at I3D 2012.
  • Dec 11: An extended version of our paper, Real-time rough refraction, has been accepted at TVCG 2012.
  • Feb 11: Our paper, Real-time rough refraction, was judged "best paper" at I3D 2011.
  • Jan 11: Moved to the dept of computer science at UCL as an Honorary Research Associate.
  • Dec 10: Our paper, Real-time rough refraction, was accepted at I3D 2011.
  • Sep 10: I have received the Newton International Fellowship, competing with researchers in natural/social sciences, engineering and humanities.
  • March 5: Traced back my academic genealogy to the 18th century! Check it out!
  • Jan 10: Ajitha and I are thrilled. Our son Atreya was born.
  • Dec 09: The presentation slides for Our SIGGRAPH Asia 2009 paper are now available on my research page.
  • Dec 09: Our paper on approximating multiple scattering in heterogeneous scattering media was accepted at Eurographics 2010.
  • Sep 09: Our SIGGRAPH Asia 2009 paper is now available on my research page.
  • Aug 09: Presented our paper on depth of field at SIGGRAPH 09, New Orleans. Slides are here (ppt).
  • Aug 5: Our paper titled "Edge-preserving Multiscale Image Decomposition based on Local Extrema" was accepted at SIGGRAPH Asia 2009 (abstract on research page). Full paper, coming soon ...
  • Jun 09: ACM Transactions on Graphics 2009, Volume 28, Number 2 sports images from our paper on its cover! (Thanks Pierre and Thomas for pointing it out)
  • May 15: I plan to present our paper "Fourier Depth of Field" at SIGGRAPH in August 09.
  • Feb 19: I stumbled upon LuxRender, a pretty sophisticated open-source Monte Carlo rendering program that claims to produce statistically unbiased results. Installation on amd64-Ubuntu was a piece of cake. Worked straight out of the box to produce this sample rendering (~7000 samples per pixel in about 18 hours using 2 threads on my dual-core desktop). LuxBlend is an exporter plugin that allows integration of LuxRender into Blender. Quite cool. The documentation isn't much, but sufficient for experts.
  • Jan 30: Our "Fourier Depth of Field" paper was accepted for publication by TOG.
  • Jan 30: The pdf links to papers are now functional on my research page. Enjoy!
  • Nov 6: I found a C++ library for iterative solutions to linear systems which is compatible with SparseLib++. The documentation is non-existent. Check out this library.
  • Nov 5: I found a decent C++ library for sparse matrices. The documentation is worse than most but I only needed the library for basic stuff. Check out this library.
  • Oct 24: I did this today.
  • Oct 24: And I also did this today.

What is the time? (thanks xkcd)


  • My academic genealogy yells "Hey! No pressure":
  • I wish greatness was inherited ;)

  • I've been curious about the whole left vs right brain theory. Not sure what to make of it, or results of tests online. Here's one that tried today.
    Brain Lateralization Test Results
    Right Brain (54%) The right hemisphere is the visual, figurative, artistic, and intuitive side of the brain.
    Left Brain (50%) The left hemisphere is the logical, articulate, assertive, and practical side of the brain
    Are You Right or Left Brained?
    personality tests by similarminds.com
  • Check out the new flash music player on my music page!
  • Finally updated my photographs page!
  • Check out my music page!
  • Check out my research page!