Petrik Clarberg, Ph.D.

Computer graphics researcher
Intel Corporation

Biography

I am currently working in the Advanced Rendering Technology (ART) team at Intel in Lund, Sweden since December 2008. My research focus lies on new graphics architectures, power efficiency, shading reduction, and advanced shading and rendering methods.

In the past, I have co-founded a technology startup named Swiftfoot Graphics, developing innovative graphics hardware algorithms. I earned my PhD and MSc degrees in Computer Science and Engineering from Lund University, under the supervision of Prof. Tomas Akenine-Möller.

Part of my studies were spent as a guest researcher at the University of Montreal, working with Victor Ostromoukhov, and at the University of California, San Diego, working with Henrik Wann Jensen and Wojciech Jarosz. Previous to that, I spent one year at the National University of Singapore (NUS).

My personal research interests include Monte Carlo algorithms, in particular importance sampling, as well as ray tracing, graphics hardware algorithms, stochastic rasterization and associated techniques, and new disruptive graphics technology at large.

Publications

	Petrik Clarberg and Jacob Munkberg Deep Shading Buffers on Commodity GPUs ACM Transactions on Graphics (Proceedings of SIGGRAPH Asia 2014), vol. 33(6), pp. 227:1-227:12, 2014. bibtex
	Petrik Clarberg, Robert Toth, Jon Hasselgren, Jim Nilsson, and Tomas Akenine-Möller AMFS: Adaptive Multi-Frequency Shading for Future Graphics Processors ACM Transactions on Graphics (Proceedings of SIGGRAPH 2014), vol. 33(4), pp. 141:1-141:12, 2014. bibtex
	Karthik Vaidyanathan, Marco Salvi, Robert Toth, Tim Foley, Tomas Akenine-Möller, Jim Nilsson, Jacob Munkberg, Jon Hasselgren, Masamichi Sugihara, Petrik Clarberg, Tomasz Janczak, and Aaron Lefohn Coarse Pixel Shading High Performance Graphics, pp. 9-18, 2014. bibtex
	Jacob Munkberg, Karthik Vaidyanathan, Jon Hasselgren, Petrik Clarberg, and Tomas Akenine-Möller Layered Reconstruction for Defocus and Motion Blur Computer Graphics Forums (Proceedings of EGSR 2014), vol. 33(4), pp. 81-92, 2014. bibtex
	Karthik Vaidyanathan, Jacob Munkberg, Petrik Clarberg, and Marco Salvi Layered Light Field Reconstruction for Defocus Blur ACM Transactions on Graphics (to appear). bibtex
	Petrik Clarberg, Robert Toth, and Jacob Munkberg A Sort-based Deferred Shading Architecture for Decoupled Sampling ACM Transactions on Graphics (Proceedings of SIGGRAPH 2013), vol. 32(4), pp. 141:1-141:10. bibtex
	Jim Nilsson, Petrik Clarberg, Björn Johnsson, Jacob Munkberg, Jon Hasselgren, Robert Toth, Marco Salvi, and Tomas Akenine-Möller Design and Novel Uses of Higher-Dimensional Rasterization High Performance Graphics, 2012. bibtex
	Jacob Munkberg, Petrik Clarberg, Jon Hasselgren, Robert Toth, Masamichi Sugihara, and Tomas Akenine-Möller Hierarchical Stochastic Motion Blur Rasterization High Performance Graphics, 2011. bibtex
	Magnus Andersson, Björn Johnsson, Jacob Munkberg, Petrik Clarberg, Jon Hasselgren, and Tomas Akenine-Möller Efficient Multi-view Ray Tracing using Edge Detection and Shader Reuse The Visual Computer (Proceedings of CGI 2011), vol. 27(6-8), June 2011. bibtex
	Petrik Clarberg, Robert Toth, Jon Hasselgren, and Tomas Akenine-Möller An Optimizing Compiler for Automatic Shader Bounding Computer Graphics Forum (Proceedings of EGSR 2010), vol. 29(4), pp. 1259-1268. bibtex
	Petrik Clarberg and Tomas Akenine-Möller Exploiting Visibility Correlation in Direct Illumination Computer Graphics Forum (Proceedings of EGSR 2008), vol. 27(4), pp. 1125-1136. bibtex
	Petrik Clarberg Fast Equal-Area Mapping of the (Hemi)Sphere using SIMD (preprint) Journal of Graphics Tools, vol. 13(3), pp. 53-68, 2008. source  bibtex
	Jacob Ström, Per Wennersten, Jim Rasmusson, Jon Hasselgren, Jacob Munkberg, Petrik Clarberg and Tomas Akenine-Möller Floating-Point Buffer Compression in a Unified Codec Architecture In Proceedings of Graphics Hardware 2008, pp. 75-84. bibtex
	Petrik Clarberg and Tomas Akenine-Möller Practical Product Importance Sampling for Direct Illumination Computer Graphics Forum (Proceedings of Eurographics 2008), vol. 27(2), pp. 681-690. bibtex
	Fabrice Rousselle, Petrik Clarberg, Luc Leblanc, Victor Ostromoukhov, and Pierre Poulin Efficient Product Importance Sampling using Hierarchical Thresholding The Visual Computer (Proceedings of CGI 2008), vol 24(7-9), pp. 465-474. bibtex
	Henrik Malm, Magnus Oskarsson, Eric Warrant, Petrik Clarberg, Jon Hasselgren, and Calle Lejdfors Adaptive enhancement and noise reduction in very low light-level video In Proceedings of ICCV 2007, pp. 1-8. bibtex
	Jacob Munkberg, Petrik Clarberg, Jon Hasselgren, and Tomas Akenine-Möller Practical HDR Texture Compression Computer Graphics Forum, vol. 27(6), pp. 1664-1676, 2008. bibtex (Technical Report 92, ISSN 1404-1200, Lund University, August 2007.)
	Jacob Munkberg, Petrik Clarberg, Jon Hasselgren, and Tomas Akenine-Möller High Dynamic Range Texture Compression for Graphics Hardware ACM Transactions on Graphics (Proceedings of SIGGRAPH 2006), pp. 698-706. bibtex
	Petrik Clarberg, Wojciech Jarosz, Tomas Akenine-Möller, and Henrik Wann Jensen Wavelet Importance Sampling: Efficiently Evaluating Products of Complex Functions ACM Transactions on Graphics (Proceedings of SIGGRAPH 2005), pp. 1166-1175. bibtex

Theses

	Petrik Clarberg Hierarchical Variance Reduction Techniques for Monte Carlo Rendering Ph.D. Dissertation, Department of Computer Science, Lund University, Oct 2012. Publicly defended on Dec 7, 2012. Faculty opponent: Jason Lawrence. bibtex
	Petrik Clarberg Efficient Sampling of Products of Functions using Wavelets M.Sc. Thesis, Department of Computer Science, Lund University, March 2005. bibtex