Roger Hersch

Mission

The Peripheral Systems Lab aims at creating and exploring new paradigms in fields related to color imaging and media servers. The main focus of our research is directed towards novel imaging techniques such as spectral color prediction models, color reproduction, moiré phenomena and artistic imaging. We have also created a new approach for exploring human anatomy (Visible Human) and have developed a fault-tolerant framework for creating non-trivial parallel programs running on clusters of PCs.

Biography

Roger D. Hersch is professor of Computer Science and head of the Peripheral Systems Laboratory at EPFL. He received his engineering degree from ETHZ in 1975, worked in industry from 1975 to 1980, and obtained his PhD degree from EPFL in 1985. He directed the widely known Visible Human Web Server project, which offers a number of services for the visualization of human anatomy.
His current research focuses on color reproduction, spectral color prediction models, moiré imaging, and visual document security. Recent achievements include the PhotoProtect technology, which incorporates text as chromatic differences in order to protect identity photographs (Swiss driving license), microstructure imaging, which is used by railways companies (SNCF, RENFE) and festival organizers (Paleo) to print tickets at home and the band moire imaging technology for the protection of security documents.

MAIN PUBLICATIONS

R. D. Hersch. Spectral prediction model for color prints on paper with fluorescent additives, Applied Optics, Vol. 47, No. 26, 6710-6722, 2008. Full Text
Color images visible under UV light, R.D. Hersch, P. Donzé, S. Chosson, Proc. SIGGRAPH 2007, ACM Trans. on Graphics, Vol. 26, No.3, Article 75 , 10 pages Details Reflectance and transmittance model for recto-verso halftone prints M. Hébert, R.D. Hersch J. Opt. Soc. Am. A, Vol. 23, No. 10, October 2006, pp. 2415-2432
Full Text Distance preserving flattening of surface sections L. Saroul, O. Figueiredo and R.D. Hersch IEEE Transactions on Visualization and Computer Graphics, 12 (2006) 26-35 Full Text Spectral reflection and dot surface prediction models for color halftone prints R.D. Hersch, P. Emmel, F. Collaud, F. Crété Journal of Electronic Imaging, Vol. 14, No. 3, August 2005, pp. 33001-12 Full Text Improving the Yule-Nielsen modified spectral Neugebauer model by dot surface coverages depending on the ink superposition conditions R.D. Hersch, F. Crété IS&T/SPIE Electronic Imaging Symposium, Conf. Imaging X: Processing, Hardcopy and Applications, Jan. 05, SPIE Vol. 5667, 434-445 Full Text Band Moiré Images R.D. Hersch, S. Chosson Proc. SIGGRAPH 2004, ACM Trans. on Graphics, Vol. 23, No.3, 239-248 Full Text Protecting identity documents by microstructure color differences N. Rudaz, R.D. Hersch, Journal of Electronic Imaging, Vol. 1, No. 2, April 2004, 315-323 Full Text Reproducing color images with embedded metallic patterns R.D. Hersch, F. Collaud, P. Emmel Proc. SIGGRAPH 2003, ACM Trans. on Graphics, Vol. 22, No.3, 427-436 Full Text DPS - Dynamic Parallel Schedules S. Gerlach, R.D. Hersch Proc. of 8th Int'l Workshop on High-Level Parallel Programming Models and Supportive Environments (HIPS 2003), 17th International Parallel and Distributed Processing Symposium (IPDPS), April 22-26, Nice, France, 2003, IEEE Press, 15-24 Full Text Parameterizable Fonts Based on Shape Components C. Hu, R.D. Hersch IEEE Computer Graphics and Applications, Vol. 21, No. 3, May/June 2001, 70-85 Full Text Perceptually-Tuned Generation of Grayscale Fonts R.D. Hersch, J. Bur, C. Betrisey, A. Guertler IEEE Computer Graphics and Applications, Vol. 15, No. 6, Nov. 1995, 78-89 Full Text

Main patents

Ink thickness variations for the control of color printers US Pat. 7,252,360, inventors R.D. Hersch, P. Amrhyn, M. Riepenhoff, issued Aug. 7, 2007 [Full text] Authentication of documents and articles by moire patterns US Pat. 7,194,105, inventors R.D. Hersch; S. Chosson, issued March 20, 2007 [ Full text] Images incorporating microstructures US Pat. 7,027,660, inventors R.D.Hersch, B. Wittwer, E. Forler, P. Emmel, D. Biemann, D. Gorostidi, D. Bongard, issued April 11, 2006 [ Full text] Authentication of documents and valuable particles by using moire intensity profiles US Pat. 6,819,775, inventors I.Amidror, R.D.Hersch, issued Nov. 16, 2004 [ Full text]

Current work

Fluorescent images Advanced spectral prediction models Control of printing presses Roger Hersch's research is sponsored by the Swiss National Science Foundation, the Swiss Federal Commission for Technology Innovation (CTI), the Hasler Foundation, and from revenues of licensing agreements.