Valter Drazic - Principal Scientist, Technicolor

Valter Drazic

Principal Scientist

Location:Rennes

Laboratory:Immersive Lab

Short Bio:

I graduated as a physicist with a major in optics from the French “Ecole Nationale Supérieure de Physique” and University Louis-Pasteur, both in Strasbourg, and pursued a PhD thesis work on 3D Optical Transfer Functions in microscopy at the Karlsruhe University in Germany. Later on, my institution became “Karlsruhe Institute of Technology” which I must admit sounds much better on my resumee.

After my PhD thesis, I joined Thomson/Technicolor  were I have tw(pl)enty years of experience as an engineer in various Display Labs involved in consumer products.

My lack of obstinacy to stick to programs has been awarded by a promotion to “Technical Advisor” and in 2001, I have been assigned (voluntarily) in the TV/Video Business Unit in Indianapolis where I was helping to bring to the US market the first LCOS based rear-projector which was a very innovative product.

After the closing of the display Lab, I remained one of the very few Optical Experts in Rennes, mainly because of a new European Project necessitating such an experience. In that frame, I have pushed the development of a video plenoptic camera and that work paved the way to “Contend for 3D” System Project later on.

In 2010, I became Senior Scientist and have been involved for two years in a newly learned discipline: disparity estimation. After many disappointed hopes that my baby-cared real-time disparity estimator, which runs as fast on a gamer GPU than HHI’s on 4 desktops and 8-GPU would get through to the market,  I finally came to computational photography. The learned disparity estimation discipline from 2010 to 2012 was a sine qua none in plenoptic image processing.

I have been involved in two exploratory projects where Optics knowledge was mandatory and I’m still acting in the field of Super-resolution in plenoptic imaging.

Since I became a Senior Scientist, I have regularly published papers in conferences or journals. As they are not updated on this page, they can be found with the help of Google Scholar. I am eager to share my knowledge which combines acquisition and processing, signals and hardware, optics and vision to positively influence our company’s projects. 

Since December 2014, I have been promoted to Principal Scientist.

I am also an associated member of Technicolor's Fellowship Network since 2013

Research interests:

My main research area covers projection technologies, non imaging optical systems, optical design, flat displays, HDR, Color Management, 3D, disparity map calculation in real time, scientific computing and parallel processing on GPGPU, Computer Vision and Image processing. I also have a passion for Photography.

List of achievements:

Products

  • Successful collaboration to the development of the first worldwide commercialized HD rear-projector with reflective microdisplays in 2001
  • Real-time disparity estimation of HD pairs on GPGPU using Cuda and OpenCL.
  • Fusion of Kinect depth data with disparity estimation for robust and reliable disparity maps.

Prototypes shown in exhibitions

  • Realization of the light engines for:
  • Babel front projector, shown at IFA Berlin 1995 as an advanced product
  • Slim projector “TURBO” shown at CES 2005 with a one optical component illumination system
  • Prototype of the first LED illuminated micro display rear projector, private show at IFA Berlin 2005
  • Plenoptic camera and multi-view video shots, to be presented at OSIRIS final review 2010

Prototypes

  • From 1993 to 1999: realization of light engines for numerous prototypes intended to be released as products.
  • Backlights for viewfinders shown to Grass Valley 2004

SUBCONTRACTING WORK FOR OTHER TECHNICOLOT BUSINESS UNITS

  • Optimization of emitting cell geometry for improved light extraction for THOMSON Plasma 1999
  • Stray light suppression in CRT rear projectors for TV & Video Indianapolis 1999
  • 18 month mission in Indianapolis USA as an optical expert in the TV Video business unit 2001-2002

PhD thesis

  • Fonctions de transfert optique tridimensionnelles et critère de confocalité pour le microscope à balayage. Verlag Shaker, Aachen, Germany, 1993.

Journals

·         Dependence of two- and three-dimensional optical transfer functions on pinhole radius in a coherent confocal microscope. V. Drazic. Journal of the Optical Society of America A, 9(5) :725-731, 1993.

·         Dependence of two- and three-dimensional optical transfer functions on pinhole radius in a coherent confocal microscope – reply to comments. V. Drazic. Journal of the Optical Society of America A, 10(3) :535-537, 1993.

·         Three-dimensional transfer function of coherent confocal microscopes with extended source and detector. V. Drazic. Journal of Modern Optics, 39(8):1777-1790, 1992.

·         Three-dimensional transfer function analysis of a coherent fluorescence microscope with finite sized source and detector. V. Drazic. Journal of Modern Optics, 40(5):879-887, 1993.

·         Optimal design and critical analysis of a high resolution video plenoptic demonstrator. Extended paper published in the Journal of Electronic Imaging, Q1/2012 as one of the best papers from SDA 2011

Conferences

·         Optimal depth resolution in plenoptic imaging, V. Drazic, ICME 2010 Singapore, July 2010

·         Optimal design and critical analysis of a high resolution video plenoptic demonstrator. V. Drazic & al, Stereoscopic Displays and Applications, San Francisco 2011

·         A precise Real-time Stereo Algorithm, V. Drazic and N. Sabater, IVCNZ 2012, Dunedin, New Zealand

·         A real-time 3D multi-view rendering from a real-time 3D captureD. Doyen, S. Thiebaud, V. Drazic, C. Thébault, SID 2013

·         Light-Field Demultiplexing and Disparity Estimation, N. Sabater V. Drazic M. Seifi G. Sandri, P. Perez, ICCP 2014

·         Fusion of Kinect depth data with trifocal disparity estimation for near real-time high quality depth maps generation, G. Boisson, P. Kerbiriou, V. Drazic, O. Bureller, N. Sabater, A. Schubert, SDA 2014

Patents

I hold 28 granted patents.

Latest publications

Article

Disparity guided demosaicking of light field images

ICIP 2014
October 29, 2014

Accurate disparity estimation for plenoptic images

ECCV Workshop
September 10, 2014

Fusion of Kinect depth data with trifocal disparity estimation for near real-time high quality depth maps generation

IS&T/SPIE Electronic Imaging Conference Stereoscopic Displays & Applications (SD&A), San Francisco, 2-6 February 2014
March 03, 2014

A Precise Real-time Stereo Algorithm

IVCNZ '12
November 26, 2012

Optimal design and critical analysis of a high-resolution video plenoptic demonstrator

Valter Drazic, Jean-Jacques Sacré, Arno Schubert, Jérôme Bertrand, Etienne Blondé

J. Electron. Imaging
February 24, 2012

Optimal design and critical analysis of a high resolution video plenoptic demonstrator

Valter Drazic, Jean-Jacques Sacré, Jérôme Bertrand, Arno Schubert, Etienne Blondé

Electronic Imaging, Stereoscopic Displays and Applications
January 27, 2011