Olivier Alata

Hubert Curien Laboratory, UMR CNRS 5516

Telecom Saint-Etienne, Jean Monnet University, Saint-Etienne, Lyon University, France

Email : olivier.alata@univ-st-etienne.fr

Research activity keywords

• Signal & Image processing (analysis, modeling, reconstruction), Computer vision
• Stochastic modeling:
• Gaussian processes.
  
• Mixture models, Information geometry (Bregman divergence), Directional distributions.
• Markov processes: Markov Random Fields, Markov Point Processes, Markov Chains.
• n-D & vectorial linear prediction processes (AR, ARMA) and extensions (ARFIMA, ...), Wold decomposition.
• Non-stationary processes.
• Non-parametric modeling.
• Estimation :
• Model selection (Information criteria)
  
• Stochastic methods (MCMC) and adaptative methods
  
• EM type algorithms
  
• Applications:
• Texture analysis and synthesis
• Classification and Pattern recognition, segmentation
• Reconstruction
• Works in progress:
• Gaussian processes and application to videos (in collaboration with Institut Camille Jordan).
  
• Micro-expressions detection / analysis / recognition - more information here
• Texture modeling (static, dynamic, geometric transformations, stationary & non-stationary)
• Characterization and discrimination of catalysts - more information here
• RGB-D image analysis & segmentation
• Github for PAMI journal / BMVC conf paper on JCSA-RM clustering
• Github for STCO journal paper on MBHC-FMM clustering
• Github for ICPR conf paper on MBHC-WMM clustering
  
• Tomo-PIV "object-oriented" reconstruction. see CFTL 2016, et EUSIPCO 2015

Selected publications (since 2009)
For a complete list of publications until 2013 click here
Click on links or buttons to acces full-text publications or information about publications.

2018	C. Arango, O. Alata, R. Emonet, A.-C. Legrand & H. Konik, "Micro-Expression Spotting using the Riesz Pyramid", IEEE Winter Conf. on Applications of Computer Vision (WACV) 2018, USA. C. Arango, O. Alata, R. Emonet, A.-C. Legrand & H. Konik, "Subtle Motion Analysis and Spotting using the Riesz Pyramid", VISIGRAPP-VISAPP 2018, Funchal, Madeira, Portugal. R. Ben-Salah, O. Alata, B. Tremblais, L. Thomas & L. David, "Tomographic Reconstruction of 3D Objects using Marked Point Process Framework", Journal of Mathematical Imaging and Vision (JMIV), vol. 60(7), pp. 1132-1149, 2018. https://doi.org/10.1007/s10851-018-0800-6 Z. Tan, M. Moreaud, O. Alata, A. M. Atto, "ARFBF morphological analysis - application to the discrimination of catalyst active phases", Image Analysis & Stereology Journal (IAS), vol. 37(1), pp. 21-34, 2018. https://doi.org/10.5566/ias.1624
2017	K. Henni, O.Alata, L. Zaoui, B. Vannier, A. Elidrissi & A. Moussa, "ClusterMPP: An unsupervised density-based clustering algorithm via Marked Point Process", Intelligent Data Analysis, vol. 21, no. 4, pp. 827-847, 2017. K. Henni, O.Alata, A. Elidrissi, B. Vannier, L. Zaoui & A. Moussa, "Marked Point Processes for Microarray Data Clustering", Chapter in: F. Palumbo, A. Montanari, M. Vivhi (eds) Data Science. Studies in Classification, Data Analysis, and Knowledge Organization. Springer, Cham, 2017. M. Elawady, O. Alata, C. Ducottet, C. Barat & P. Colantoni, "Multiple Reflection Symmetry Detection via Linear-Directional Kernel Density Estimation", Int. Conf. on Computer Analysis of Images and Patterns (CAIP), Ystad, Sweden, 2017. M. Elawady, C. Ducottet, O. Alata & C. Barat, "Wavelet-based Reflection Symmetry Detection via Textural and Color Histograms", ICCV'17 Workshop challenge "Detecting Symmetry in the Wild", Venice, Italy, 2017 (1st rank). S. Colak, E. Dumas, V. Fresse & O. Alata, "Proposition and Evaluation of a Real-Time Generic Architecture for a Laser Stripe Detection System on FPGA", Int. Conf. on Design and Architectures for Signal and Image Processing (DASIP), Dresden, DE, 2017.
2016	Md. A. Hasnat, O. Alata & A. Trémeau, "Joint Color-Spatial-Directional clustering and Regions Merging (JCSD-RM) for unsupervised RGB-D image segmentation", IEEE Trans. on Pattern Analysis and Machine Intelligence, Vol. 38, n°. 11, pp. 2255 - 2268, Nov. 2016. (10.1109/TPAMI.2015.2513407). E. Grandchamp, M. Abadi, O. Alata, "A Pareto front approach for feature selection", Int. Conf. on Pattern Recognition Applications and Methods (ICPRAM), Feb. 2016, Rome, Italy. R. Ben-Salah, L. Thomas, B. Tremblais, O. Alata & L. David, "Reconstruction de volumes de particules par processus ponctuels marqués", Congrès Francophone de Techniques Laser (CFTL) 2016, Toulouse, France.
2015	Md. A. Hasnat, O. Alata & A. Trémeau, “Model-based hierarchical clustering with Bregman divergences and Fishers mixture model: application to depth image analysis”, Statistics and computing, Vol. 26, n°4, pp. 861-880, July 2016 (published on-line in 2015). K. Henni, O. Alata, L. Zaoui, A. Elidrissi & A. Moussa, "Classification non supervisée de données multidimensionnelles par les processus ponctuels marqués". Revue ARIMA, INRIA, 2015, 21, pp. 67-83. R. Ben-Salah, O. Alata, L. Thomas, B. Tremblais & L. David, "Particle volume reconstruction based on a marked point process and application to Tomo-PIV", EUSIPCO 2015, Nice, France. Z. Tan, A. Atto, O. Alata & M. Moreaud, "ARFBF model for non stationary random fields and application in HRTEM images". IEEE ICIP 2015, Sept. 2015, Québec City, Canada. Z. Tan, O. Alata, M. Moreaud & A. Atto, "Convolution mixture of FBF and modulated FBF and application to HRTEM images", GRETSI 2015, Lyon, France.
2014	Md. A. Hasnat, O. Alata & A. Trémeau, “Unsupervised RGB-D image segmentation using joint clustering and region merging”, British Machine Vision Conference (BMVC) 2014, Nottingham, United Kingdom. R. Ben Salah, O. Alata, L. Thomas, B. Tremblais and L. David, “3D Particle Volume Tomographic Reconstruction based on Marked Point Process: Application to Tomo-PIV in Fluid Mechanics”, IEEE ICASSP 2014, Florence, Italie.
2013	O. Alata, C. Olivier, Y. Pousset, “Law recognitions by information criteria for the statistical modeling of small scale fading of the radio mobile channel”. Signal Processing, Vol. 93, n° 5, pp. 1064-1078, 2013.
2011	I. Qazi, O. Alata, J.-C. Burie, M. Abadi, A. Moussa & C. Fernandez-Maloigne, “Parametric models of linear prediction error distribution for color texture and satellite image segmentation”. Computer Vision and Image Understanding (CVIU), Vol. 115, n° 8, pp. 1245-1262, 2011. O. Alata, S. Burg and A. Dupas, “Grouping/Degrouping Point Process, a point process driven by geometrical and topological properties of a partition of regions”. Computer Vision and Image Understanding (CVIU), Vol. 115, n° 9, pp. 1324-1339, 2011. I. Qazi, O. Alata, J.-C. Burie, A. Moussa and C. Fernandez-Maloigne, “Choice of a pertinent color space for color texture characterization using parametric spectral analysis”. Pattern Recognition, vol. 44, n° 1, pp. 16-31, 2011.
2010	I.-U.-H. Qazi, O. Alata, J.-C. Burie & C. Fernandez-Maloigne, “Colour Spectral Analysis for Spatial Structure Characterization of Textures in IHLS Colour Space”. Pattern Recognition, Vol. 43, n° 3, pp. 663-675, 2010.
2009	O. Alata & L. Quintard, “Is there a Best Color Space for Color Image Characterization or Representation based on Multivariate Gaussian Mixture Model ?”. Computer Vision and Image Understanding (CVIU), Volume 113, Number 8, pages 867-877, August 2009.