Colas Schretter

View or print my resume in PDF

Journal papers

Raees Kizhakkumkara Muhamad, Colas Schretter, David Blinder, and Peter Schelkens, Autoregressive modeling for lossless compression of holograms, OSA Optics Express, vol. 31, no. 23, pp. 38589–38609, 2023. Link

Murilo Bresciani de Carvalho, Carla L. Pagliari, Gustavo de OE Alves, Colas Schretter, Peter Schelkens, Fernando Pereira, and Eduardo AB Da Silva, Supporting Wider Baseline Light Fields in JPEG Pleno With a Novel Slanted 4D-DCT Coding Mode, IEEE Access, vol. 11, pp. 28294–28317, 2023. Link

Raees Kizhakkumkara Muhamad, Tobias Birnbaum, David Blinder, Colas Schretter, and Peter Schelkens, Binary hologram compression using context based Bayesian tree models with adaptive spatial segmentation, OSA Optics Express, vol. 30, no. 14, pp. 25597–25611, 2022. Link

Artem Shcheglov, Yunfeng Nie, Colas Schretter, Rob Heeman, Arthur van der Put, Willem Hoving, Hugo Thienpont, Peter Schelkens, and Heidi Ottevaere, Miniaturized cost-effective broadband spectrometer employing a deconvolution reconstruction algorithm for resolution enhancement, OSA Optics Express, vol. 30, no. 7, pp. 11459–11471, 2022. Link

Raees Kizhakkumkara Muhamad, David Blinder, Athanasia Symeonidou, and Peter Schelkens, Object-based digital hologram segmentation and motion compensation, OSA Optics Express, vol. 28, no. 8, pp. 11861–11882, 2020. Link

Raees Kizhakkumkara Muhamad, David Blinder, Athanasia Symeonidou, Tobias Birnbaum, Osamu Watanabe, Colas Schretter and Peter Schelkens, Exact global motion compensation for holographic video compression, OSA Applied Optics, vol. 58, no. 34, pp. G204–G217, 2019. Link

Tobias Birnbaum, Ayyoub Ahar, David Blinder, Colas Schretter, Thomas Kozacki and Peter Schelkens, Wave Atoms for Digital Hologram Compression, OSA Applied Optics, vol. 58, no. 22, pp. 6193–6203, 2019. Link

Miaomiao Zhang, Ivan Markovsky, Colas Schretter and Jan D'hooge, Compressed Ultrasound Signal Reconstruction using a Low-rank and Joint-sparse Representation Model, IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, Open Access Epub, pp. 1–13, 2019. Link

David Blinder, Ayyoub Ahar, Stijn Bettens, Tobias Birnbaum, Athanasia Symeonidou, Heidi Ottevaere, Colas Schretter and Peter Schelkens, Signal Processing Challenges for Digital Holographic Video Display Systems, Signal Processing: Image Communication, vol. 70, pp. 114–130, 2019. Link

David Blinder, Colas Schretter and Peter Schelkens, Global Motion Compensation for Compressing Holographic Videos, OSA Optics Express, vol. 26, nr. 20, pp. 25524–25533, 2018. Link

David Blinder, Colas Schretter, Heidi Ottevaere, Adrian Munteanu and Peter Schelkens, Unitary Transforms using Time-Frequency Warping for Digital Holograms of Deep Scenes, IEEE Transactions on Computational Imaging, vol. 4, no. 2, pp. 206–218, 2018. Link

Colas Schretter, David Blinder, Ann Dooms, Jan D'Hooge and Peter Schelkens, Ultrasound Imaging From Sparse RF Samples Using System Point Spread Functions, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, vol. 25, no. 14, pp. 16491–16508, 2017. Link

Stijn Bettens, Hao Yan, David Blinder, Heidi Ottevaere, Colas Schretter and Peter Schelkens, Studies on the Sparsifying Operator in Compressive Digital Holography, OSA Optics Express, vol. 25, no. 16, pp. 18656–18676, 2017. Link

Stijn Bettens, Colas Schretter, Nikolaos Deligiannis and Peter Schelkens, Bounds and Conditions for Compressive Digital Holography Using Wavelet Sparsifying Bases, IEEE Transactions on Computational Imaging, vol. 3, no. 4, pp. 592–604, 2017. Link

Colas Schretter, David Blinder, Stijn Bettens, Heidi Ottevaere and Peter Schelkens, Regularized Non-convex Image Reconstruction in Digital Holographic Microscopy, OSA Optics Express, vol. 25, no. 14, pp. 16491–16508, 2017. Link

Colas Schretter, Zhijian He, Mathieu Gerber, Nicolas Chopin and Harald Niederreiter, Van der Corput and Golden Ratio Sequences Along the Hilbert Space-Filling Curve, Monte Carlo and Quasi-Monte Carlo Methods, Springer Proceedings in Mathematics & Statistics, Vol. 163, Ronald Cools and Dirk Nuyens (Eds), ISBN 978-3-319-33505-6, 2016. Link

Colas Schretter and Harald Niederreiter, A Direct Inversion Method for Non-Uniform Quasi-Random Point Sequences, Monte Carlo Methods and Applications, vol. 19, no. 1, pp. 1–9, 2013. Link

Colas Schretter, Leif Kobbelt and Paul-Olivier Dehaye, Golden Ratio Sequences for Low-Discrepancy Sampling, Journal of Graphics Tools, vol. 16, no. 2, pp. 95–104, 2012. Link

Colas Schretter, Georg Rose and Matthias Bertram, Image-Based Iterative Compensation of Motion Artifacts in Computed Tomography, Medical Physics, vol. 36, no. 11, pp. 5323–5330, 2009. Link

Laurent Gatto and Colas Schretter, Designing Primer Pairs and Oligos with OligoFaktorySE, EMBnet news, vol. 15, no. 3, pp. 22–24, 2009. Link

Colas Schretter, Event-by-Event Image Reconstruction From List-Mode PET Data, IEEE Transactions on Image Processing, vol. 8, no. 1, pp. 117–124, 2009. Link

Patrick E. Meyer, Colas Schretter and Gianluca Bontempi, Information-Theoretic Feature Selection in Microarray Data Using Variable Complementarity, IEEE Journal of Selected Topics in Signal Processing, vol. 2, no. 3, pp. 261–274, 2008. Link

Colas Schretter, A Fast Tube of Response Ray-Tracer, Medical Physics, vol. 33, no. 12, pp. 4744–4748, 2006. Link

Colas Schretter and Michel C. Milinkovitch, OligoFaktory: A Visual Tool for Interactive Oligonucleotide Design, Bioinformatics, vol. 22, no. 1, pp. 115–116, 2006. Link

Colas Schretter, Discover OligoFaktory Standalone Edition, EMBnet news, vol. 11, no. 4, pp. 24–25, 2005. Link

Colas Schretter, A Brush Tool for Interactive Texture Synthesis, ICGST International Journal on Graphics, Vision and Image Processing, vol. 6, no. 5, pp. 55–60, 2005. Link

Patents

David Blinder, Colas Schretter and Peter Schelkens, Method and Apparatus for Compensating Motion for a Holographic Video Stream, (Submitted) EPO, Patent No. EP18154795.1, 2018.

Colas Schretter, Shaun Bundervoet, Ann Dooms and Peter Schelkens, Ultrasound Imaging System and Method for Representing RF Signals Therein, US Patent App. 15/570,604, April, 2016. Link

Colas Schretter, Matthias Bertram and Christoph Neukirchen, Method and Apparatus For Large Field of View Imaging and Detection and Compensation of Motion Artifacts, US 30961/04024, January, 2009. Link

Peter Forthmann, Thomas Koehler, Udo Van Stevendaal, Matthias Bertram, Steffen Hohmann and Colas Schretter, Method and Apparatus to Improve CT Image Acquisition Using Displaced Geometry, US 30961/04021, September, 2008. Link

Technical reports

Colas Schretter, Computing Random Points on Sphere, Boost C++ Ticket 1059, June, 2007. Link

Colas Schretter and Laurent Gatto, A Tiny Queuing System for Blast Servers, December, 2005. Link

Colas Schretter and Michel C. Milinkovitch, Automated Long Oligo Design on Consensus Regions of Similar Genomes, Tech. Report UEG, IBMM, ULB, 2005.

Colas Schretter and Michel C. Milinkovitch, Oligonucleotide Design by Multilevel Optimization, Tech. Report UEG, IBMM, ULB, 2005. Link

Dissertations

Colas Schretter, Correction of Non-Periodic Motion in Computed Tomography, Doctoral thesis, Otto-von-Guericke University, Magdeburg, Germany, April, 2010. Link

Colas Schretter, New Algorithms for Image Reconstruction From Emission Tomography List-Mode Data, DEA thesis, Université libre de Bruxelles, Brussels, Belgium, September, 2006.

Colas Schretter, Efficient N-Body Algorithms for Astrophysical Simulations, Master thesis, Université libre de Bruxelles, Brussels, Belgium, June, 2003.

Invited lectures

Colas Schretter, Speckle Tracking with Gaussian Mixtures, Ultrasound-Based Measurement of Healthy and Pathological Tendon Mechanics, Leuven, Belgium, June 6-7, 2016.

Colas Schretter, Quasi-Random Point Sequences for Compressed Sensing, Tenth IMACS Seminar on Monte Carlo Methods, Linz, Austria, July 6-10, 2015.

Colas Schretter, Constructing Quasi-Random Points with the Golden Ratio Sequence and the Hilbert Space Filling Curve, Conference on Monte Carlo and Quasi-Monte Carlo Methods in Scientific Computing, Leuven, Belgium, April 6-11, 2014. (Joint work with Harald Niederreiter.)

Colas Schretter, Séquences et ensembles quasi-aléatoires, Brussels Summer School of Mathematics (BSSM), Brussels, Belgium, August 1-7, 2013.

Colas Schretter, Jason N. Hill and Martha L. Gray, Wake-Up to Bruxism: Sleep Monitoring and Personalized Audio Feedback on your Smartphone, MIT Future of Health and Wellness Conference, Cambridge, February 6-7, 2013. MIT Sloan BioInnovations Conference, Cambridge, February 22, 2013. Poster

Colas Schretter, Hierarchical B-Spline Mixture Models for TOF-PET Image Reconstruction, M+Vision Open-House, Madrid, Spain, July 19-20, 2012.

Colas Schretter and Leif Kobbelt, Golden Ratio Sequences for Low-Discrepancy Sampling, HiGraphics, Hirschegg, Austria, March 27-31, 2011.

Alfonso A. Isola, Colas Schretter, Michael Grass, Matthias Bertram, Georg Rose and Wiro J. Niessen, Compensation of Periodic Cardiac Motion and Non-Periodic Abdominal Motion in Cone-Beam CT, Marie Curie Monitoring Mission, Alexander von Humboldt Foundation, Bonn, Germany, January 29-30, 2009. Poster

Colas Schretter, Improving Image Quality in Computed Tomography by Motion Estimation and Compensation, 8th IEEE EMBS International Summer School on Biomedical Imaging, Berder, France, June 20-28, 2008.

Conference Papers

Jinyan Liu, Colas Schretter, Artem Shcheglov, Heidi Ottevaere, and Yunfeng Nie, Digital aberration correction to enhance the spectral resolution of miniaturized optical spectrometers, Optics, Photonics, and Digital Technologies for Imaging Applications VIII, vol. 12998, pp. 225–238, 2024. Link

David Blinder, Fan Wang, Colas Schretter, Takashi Kakue, Tomoyoshi Shimobaba, and Peter Schelkens, Joint color optimization for computer-generated holography without color replicas, Optics, Photonics, and Digital Technologies for Imaging Applications VIII, vol. 12998, pp. 117–124, 2024. Link

Peter Schelkens, David Blinder, Raees Kizhakkumkara Muhamad, Saeed Mahmoudpour, Colas Schretter, and Tomoyoshi Shimobaba, Compression challenges for digital holography, Digital Holography and Three-Dimensional Imaging 2023, OSA Technical Digest paper HW4C.4\1, Boston, Massachusetts, USA, August 14-27, 2023. Link

Raees Kizhakkumkara Muhamad, Tobias Birnbaum, David Blinder, Colas Schretter, and Peter Schelkens, Perceptually lossless compression of bi-level holograms using adaptive Markovian models, Digital Holography and Three-Dimensional Imaging 2023, OSA Technical Digest paper HM3C.4, Boston, Massachusetts, USA, August 14-27, 2023. Link

Colas Schretter, and Peter Schelkens, Sequential Adaptive Scattering-Compensated Holography for Fluorescence Microscopy, Digital Holography and Three-Dimensional Imaging 2022, OSA Technical Digest paper Th2A.8, Cambridge University, Cambridge, UK,Bordeaux, France, August 1-4, 2022. Link

Raees Kizhakkumkara Muhamad, Tobias Birnbaum, David Blinder, Colas Schretter, and Peter Schelkens, INTERFERE: A unified compression framework for digital holography, Digital Holography and Three-Dimensional Imaging 2022, OSA Technical Digest paper Th4A.2, Cambridge University, Cambridge, UK,Bordeaux, France, August 1-4, 2022. Link

Raees Kizhakkumkara Muhamad, Tobias Birnbaum, David Blinder, Colas Schretter, and Peter Schelkens, Lossless Compression of Binary Holograms with Context Models and Adaptive Segmentation, Digital Holography and Three-Dimensional Imaging 2021, OSA Technical Digest paper DTh7C.7, OSA Virtual Event, July 19-23, 2021. Link

Raees Kizhakkumkara Muhamad, Athanasia Symeonidou, David Blinder, Tobias Birnbaum, Colas Schretter and Peter Schelkens, Exact Compensation of Rotational Motion for Holographic Video Compression, Digital Holography and Three-Dimensional Imaging 2019, OSA Technical Digest paper Tu4A.2, Bordeaux, France, May 19-23, 2019. Link

Tobias Birnbaum, Ayyoub Ahar, Silvio Montrésor, Pascal Picart, Colas Schretter and Peter Schelkens, Speckle Denoising of Computer-Generated Macroscopic Holograms, Digital Holography and Three-Dimensional Imaging 2019, OSA Technical Digest paper W3A.1, Bordeaux, France, May 19-23, 2019. Link

Tobias Birnbaum, Ayyoub Ahar, David Blinder, Colas Schretter, Tomasz Kozacki and Peter Schelkens, Wave Atoms for Lossy Compression of Digital Holograms, IEEE Data Compression Conference, DCC 2019, Snowbird, Utah, USA, March 26-29, 2019. Link

Miaomiao Zhang, Ivan Markovsky, Colas Schretter and Jan D'hooge, Ultrasound Signal Reconstruction from Sparse Samples Using a Low-Rank and Joint-Sparse Model, IEEE International Ultrasonics Symposium, IUS 2018, Kobe, Japan, October 22-25, 2018. Link

Peter Schelkens, David Blinder, Tobias Birnbaum, Athanasia Symeonidou, Ayyoub Ahar and Colas Schretter, Source Coding of Holographic Data: Challenges, Algorithms and Standardization Efforts, Proc. of SPIE Speckle 2018: VII International Conference on Speckle Metrology, vol. 10834, pp. 10834-6, Janów Podlaski, Poland, 2018. Link

Colas Schretter, Jianyong Sun and Peter Schelkens, From Adaptive Kernel Density Estimation to Sparse Mixture Models, iTWIST'18, international Traveling Workshop on Interactions between low-complexity data models and Sensing Techniques, CIRM, Marseille, France, 21-23 November, 2018. Link

Miaomiao Zhang, Ivan Markovsky, Colas Schretter and Jan D'Hooge, A Low-Rank and Joint-Sparse Model for Ultrasound Signal Reconstruction, iTWIST'18, international Traveling Workshop on Interactions between low-complexity data models and Sensing Techniques, CIRM, Marseille, France, 21-23 November, 2018. Link

Colas Schretter, Jianyong Sun and Peter Schelkens, Image Reconstruction with Smoothed Mixtures of Regressions, 2018 IEEE International Conference on Image Processing, pp. 400-404, Athens, Greece, October 7-10, 2018. Link

Tobias Birnbaum, David Blinder, Colas Schretter and Peter Schelkens, Compressing Macroscopic Near-Field Digital Holograms with Wave Atoms, OSA Imaging and Applied Optics, Orlando, Florida United States, 25-28 June, paper DW2F.5, 2018. Link

Peter Schelkens, Ayoubb Ahar, Stijn Bettens, Vitaliy Bilous, Tobias Birnbaum, David Blinder, Heidi Ottevaere, Adrian Munteanu, Colas Schretter and Athanasia Symeonidou, A Roadmap Towards Holographic Television From a Signal Processing Perspective, OSA Digital Holography and Three-Dimensional Imaging, JeJu Island South Korea, May 29-June 1, paper M2B.1, 2017. Link

Colas Schretter, Stijn Bettens, David Blinder, Marco Cagnazzo, Beatrice Pesquet-Popescu, Fréderic Dufaux and Peter Schelkens, Compressed Digital Holography: from Micro towards Macro, Proc. SPIE Optics, Photonics and Digital Technologies for Imaging Applications, San Diego, CA, August 30--September 1, 9971-34, 2016. Link

Athanasia Symeonidou, David Blinder, Ayyoub Ahar, Colas Schretter, Adrian Munteanu and Peter Schelkens, Speckle Noise Reduction for Computer Generated Holograms of Objects with Diffuse Surfaces, Proc. SPIE 9896, Optics, Photonics and Digital Technologies for Imaging Applications IV, 98960F, Brussels, Belgium, April 03, 2016. Link

Ayyoub Ahar, David Blinder, Tim Bruylants, Colas Schretter, Adrian Munteanu and Peter Schelkens, Subjective Quality Assessment of Numerically Reconstructed Compressed Holograms, Proc. SPIE 9599, Applications of Digital Image Processing XXXVIII, 959901, San Diego, California, United States, August 9, 2015. Link

Colas Schretter, David Blinder, Tim Bruylants, Peter Schelkens and Adrian Munteanu, Efficient Scalable Compression of Sparsely Sampled Images, IEEE International Conference on Image Processing 2015, Quebec City, Canada, September 27-30 2015. Link Poster

Colas Schretter, Jianyong Sun, Shaun Bundervoet, Ann Dooms, Peter Schelkens, Catarina de Brito Carvalho, Pieter Slagmolen and Jan D'hooge Continuous Ultrasound Speckle Tracking with Gaussian Mixtures, IEEE Engineering in Medicine and Biology Conference 2015, Milano, Italy, August 25-29 2015. Link

David Blinder, Ayyoub Ahar, Athanasia Symeonidou, Yafei Xing, Tim Bruylants, Colas Schretter, Beatrice Pesquet-Popescu, Fréderic Dufaux, Adrian Munteanu and Peter Schelkens Open Access Database for Experimental Validations of Holographic Compression Engines, Seventh International Workshop on Quality of Multimedia Experience (QoMEX 2015), Costa Navarino, Greece, May 26-29 2015. Link

Stijn Bettens, Hao Yan, Shaun Bundervoet, Colas Schretter, Ann Dooms, and Peter Schelkens Reconstruction Resilience to Subsampling in Compressive Fresnel Holography, OSA Digital Holography & 3-D Imaging Meeting, paper DT1A.3, Shanghai, China, May 24-28 2015. Link

Colas Schretter, Ignace Loris, Ann Dooms and Peter Schelkens, Total Variation Reconstruction From Quasi-Random Samples, iTWIST'14, international - Traveling Workshop on Interactions between Sparse models and Technology, Namur, Belgium, August 27-29 2014. Paper Poster

Shaun Bundervoet, Colas Schretter, Ann Dooms and Peter Schelkens, Bayesian Estimation of Sparse Smooth Speckle Shape Models for Motion Tracking in Medical Ultrasound, iTWIST'14, international - Traveling Workshop on Interactions between Sparse models and Technology, Namur, Belgium, August 27-29 2014. Paper Poster

Colas Schretter, Jianyong Sun and Leif Kobbelt, Online Estimation of B-Spline Mixture Models From TOF-PET List-Mode Data, Proc. of the 11th International Meeting on Fully Three-Dimensional Image Reconstruction in Radiology and Nuclear Medicine, Potsdam, Germany, July 11-15, pp. 274–277, 2011. Paper

Se Young Chun, Colas Schretter and Jeffrey A. Fessler, Sufficient Condition for Local Invertibility of Spatio-Temporal 4D B-Spline Deformations, Proc. of the 7th IEEE International Symposium on Biomedical Imaging, Rotterdam, The Netherlands, April 14-17, pp. 1221–1224, 2010. Link Poster

Colas Schretter, Fabian Pilatus, Georg Rose, Til Aach and Matthias Bertram, Optical Flow Motion Estimation for Approximate Motion Compensation in Cone-Beam CT, Proc. of the 10th International Meeting on Fully Three-Dimensional Image Reconstruction in Radiology and Nuclear Medicine, Beijing, China, September 5-10, pp. 327–330, 2009. Paper

Colas Schretter, Christoph Neukirchen, Georg Rose and Matthias Bertram, Optimal Pre-Filtering for Linear Interpolation in Computed Tomography, Proc. of the 2nd Workshop on High-Performance Image Reconstruction, Beijing, China, September 6, pp. 29–32, 2009. Paper

Colas Schretter, Online PET Reconstruction From List-Mode Data, Proc. of the 10th International Meeting on Fully Three-Dimensional Image Reconstruction in Radiology and Nuclear Medicine, Beijing, China, September 5-10, pp. 195–198, 2009. Paper Poster

Colas Schretter, Christoph Neukirchen, Georg Rose and Matthias Bertram, Image-Based Iterative Compensation of Motion Artifacts in Computed Tomography, SPIE Medical Imaging, Lake Buena Vista, USA, February 7-12, vol. 7258, pp. 1W–8, 2009. Link

Colas Schretter, Christoph Neukirchen, Georg Rose and Matthias Bertram, Local Correction of Non-Periodic Motion in Computed Tomography, SPIE Medical Imaging, Lake Buena Vista, USA, February 7-12, vol. 7258, pp. 2M–12, 2009. Link Poster

Colas Schretter, Christoph Neukirchen, Matthias Bertram and Georg Rose, Correction of Some Time-Dependent Deformations in Parallel-Beam Computed Tomography, Proc. of the 5th IEEE International Symposium on Biomedical Imaging, Paris, France, May 14-17, pp. 764–767, 2008. Link

Ralph Brinks, Colas Schretter and Carsten Meyer, Comparison of Maximum-Likelihood List-Mode Reconstruction Algorithms in PET, Proc. of the IEEE Nuclear Science Symposium and Medical Imaging Conference, San Diego, USA, October 29 - November 4, vol. M11-389, pp. 2801–2803, 2006. Link

Colas Schretter, Laurent Gatto and Michel C. Milinkovitch, OligoFaktory: A Web Portal for Interactive Oligonucleotide Design, First BENELUX Bioinformatics Conference, Ghent, Belgium, April 14-15, 2005. Poster