Otávio Augusto Bizetto Penatti


 

Research Interests:

  • Computer vision
    • Scene and object recognition
    • Visual dictionaries
  • Content-based image retrieval
    • Image descriptors
  • Image processing
  • Multimedia geocoding

Recent news:


Projects:

  • Postdoc (12/2012 - 12/2013) - Unicamp/Samsung:
    Pattern recognition and classification by feature engineering, *-fusion, open set recognition and meta-recognition
    Principal investigator: Anderson de Rezende Rocha
    Awards:

  • PhD (03/2009 - 11/2012):
    Exploring visual dictionaries for Web image retrieval
    Advisor: Ricardo da Silva Torres
    Awards:
    • 3º place - Posters - PhD - Workshop of Thesis and Dissertations 2009 - Institute of Computing - University of Campinas (Unicamp)
    • Best Paper Award - 2011 - "Encoding spatial arrangement of visual words" - Iberoamerican Congress on Pattern Recognition (CIARP-IAPR)
    Visiting scholar:
    • 2011 (June to July) - Cedric/Cnam - Paris, France - Prof. Valerie Gouet-Brunet
    • 2012 (July to October) - University of Colorado at Colorado Springs (UCCS), CO, USA - Prof. Terrance E. Boult and Prof. Walter J. Scheirer

    Abstract   |    Thesis (PDF)

  • Master's (03/2007 - 03/2009):
    Comparative study of descriptors for content-based image retrieval on the Web
    Advisor: Ricardo da Silva Torres
    Awards:
    Abstract   |    Eva tool   |    Dissertation (in portuguese)

  • Undergraduate research project (07/2006 - 12/2006):
    Content-based image retrieval using spatial relationship descriptors
    Advisor: Ricardo da Silva Torres
    Awards:
    • 3º place CTIC 2007 - Undergraduate Research Projects Contest - Brazilian Computer Society (SBC)
    • Best Undergraduate Research Project 2006 - Institute of Computing - University of Campinas (Unicamp)

    Abstract   |    Demo


Publications:

    Google Scholar   |    Curriculum Lattes   |    LinkedIn

 Conference
 Journal
  • TWM: A framework for creating highly compressible videos targeted to computer vision tasks
    ANDALÓ, F. A. ; PENATTI, O. A. B. ; TESTONI, V.
    In: Elsevier Pattern Recognition letters, 2017. (accepted for publication)
    Abstract    |    Patent

  • Kuaa: A unified framework for design, deployment, execution, and recommendation of machine learning experiments
    WERNECK, R. de O. ; DE ALMEIDA, W. R. ; STEIN, B. V. ; PAZINATO, D. V. ; MENDES JUNIOR, P. R. ; PENATTI, O. A. B. ; TORRES, R. da S. ; ROCHA, A.
    In: Future Generation Computer Systems, volume 78, part 1, p. 59-76, 2018.
    Abstract    |    Paper

  • Nearest neighbors distance ratio open-set classifier
    MENDES JUNIOR, P. R. ; DE SOUZA, R. M. ; WERNECK, R. de O. ; STEIN, B. V. ; PAZINATO, D. V. ; DE ALMEIDA, W. R. ; PENATTI, O. A. B. ; TORRES, R. da S. ; ROCHA, A.
    In: Springer Machine Learning, volume 106, issue 3, p. 359-386, 2017.
    Abstract    |    Paper

  • Towards Better Exploiting Convolutional Neural Networks for Remote Sensing Scene Classification
    NOGUEIRA, K. ; PENATTI, O. A. B. ; SANTOS, J. A. dos
    In: Pattern Recognition, volume 61, p. 539-556, 2017.
    Abstract

  • Bag of Genres for Video Retrieval
    DUARTE, L. A. ; PENATTI, O. A. B. ; ALMEIDA, J.
    In: Conference on Graphics, Patterns, and Images (SIBGRAPI), 2016, p. 257-264.
    Abstract    |    Paper

  • Transmitting What Matters - Task-oriented video composition and compression
    ANDALÓ, F. A. ; PENATTI, O. A. B. ; TESTONI, V.
    In: Conference on Graphics, Patterns, and Images (SIBGRAPI), 2016, p. 72-79.
    Abstract    |    Paper

  • Detection of Fragmented Rectangular Enclosures in Very-High-Resolution Remote Sensing Images
    ZINGMAN, I. ; SAUPE, D. ; PENATTI, O. A. B. ; LAMBERS, K.
    In: IEEE Transactions on Geoscience and Remote Sensing, volume 54, number 8, p. 4580-4593, 2016.
    Abstract   |    Paper   |   

  • Pixel-Level Tissue Classification for Ultrasound Images
    PAZINATO, D. V. ; STEIN, B. V. ; DE ALMEIDA, W. R. ; WERNECK, R. de O. ; MENDES JUNIOR, P. R. ; PENATTI, O. A. B. ; TORRES, R. da S. ; MENEZES, F. H. ; ROCHA, A.
    In: IEEE Journal of Biomedical and Health Informatics (J-BHI), volume 20, number 1, p. 256-267, 2016.
    Abstract   |    Paper   |    Pre-print PDF

  • Mid-level Image Representations for Real-time Heart View Plane Classification of Echocardiograms
    PENATTI, O. A. B. ; WERNECK, R. de O. ; DE ALMEIDA, W. R. ; STEIN, B. V. ; PAZINATO, D. V. ; MENDES JUNIOR, P. R. ; TORRES, R. da S. ; ROCHA, A.
    In: Computers in Biology and Medicine, volume 66, p. 66-81, 2015.
    Abstract   |    Paper   |    Pre-print PDF

  • Do Deep Features Generalize from Everyday Objects to Remote Sensing and Aerial Scenes Domains?
    PENATTI, O. A. B. ; NOGUEIRA, K. ; SANTOS, J. A. dos
    In: IEEE Conference on Computer Vision and Pattern Recognition Workshops (CVPR EarthVision Workshop), p. 44-51, 2015.
    Abstract   |    Paper   |    Coffee Scenes dataset

  • Unsupervised Manifold Learning for Video Genre Retrieval
    ALMEIDA, J. ; PEDRONETTE, D. C. G. ; PENATTI, O. A. B.
    In: Iberoamerican Congress on Pattern Recognition (CIARP), Puerto Vallarta, Mexico, 2014, p. 604-612 (LNCS 8827)
    Abstract   |    Paper   |    PDF

  • Efficient and Effective Hierarchical Feature Propagation
    SANTOS, J. A. dos ; PENATTI, O. A. B. ; GOSSELIN, P-H. ; FALCÃO, A. X. ; PHILIPP-FOLIGUET, S. ; TORRES, R. da S.
    In: IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing (JSTARS), volume 7, number 12, p. 4632-4643, 2014.
    Abstract   |    Paper

  • Unsupervised Distance Learning By Reciprocal kNN Distance for Image Retrieval
    PEDRONETTE, D. C. G. ; PENATTI, O. A. B. ; CALUMBY, R. T. ; TORRES, R. da S.
    In: ACM International Conference on Multimedia Retrieval (ICMR), Glasgow, Scotland, 2014, p. 345:345-345:352.
    Abstract   |    Paper

  • Unsupervised Manifold Learning Using Reciprocal kNN Graphs in Image Re-Ranking and Rank Aggregation Tasks
    PEDRONETTE, D. C. G. ; PENATTI, O. A. B. ; TORRES, R. da S.
    In: Image and Vision Computing, volume 32, number 2, p. 120-130, 2014.
    Abstract   |    Paper   |    Pre-print PDF

  • Visual word spatial arrangement for image retrieval and classification
    PENATTI, O. A. B. ; SILVA, F. B. ; VALLE, E. ; GOUET-BRUNET, V ; TORRES, R. da S.
    In: Pattern Recognition, volume 47, number 2, p. 705-720, 2014.
    Abstract   |    WSA info page

  • A rank aggregation framework for video multimodal geocoding
    LI, L. T. ; PEDRONETTE, D. C. G. ; ALMEIDA, J. ; PENATTI, O. A. B. ; CALUMBY, R. T. ; TORRES, R. da S.
    In: Multimedia Tools and Applications, 2013.
    Abstract   |    Paper

  • Image and Video Representations based on Visual Dictionaries
    PENATTI, O. A. B. ; VALLE, E. ; TORRES, R. da S.
    In: Workshop of Thesis and Dissertations (WTD), 26th Conference on Graphics, Patterns, and Images (SIBGRAPI), Arequipa, Peru, 2013.
    Abstract   |    Paper

  • Domain-specific Image Geocoding: A Case Study on Virginia Tech Building Photos
    LI, L. T. ; PENATTI, O. A. B. ; FOX, E. A. ; TORRES, R. da S.
    In: Joint Conference on Digital Libraries (JCDL), Indianapolis, Indiana, USA, 2013, p. 363-366.
    Abstract   |    Paper   |    VTBuildings dataset

  • Remote Sensing Image Representation based on Hierarchical Histogram Propagation
    SANTOS, J. A. dos ; PENATTI, O. A. B. ; TORRES, R. da S. ; GOSSELIN, P-H. ; PHILIPP-FOLIGUET, S. ; FALCÃO, A. X.
    In: IEEE International Geoscience and Remote Sensing Symposium (IGARSS), Melbourne, Australia, 2013.
    Abstract   |    Paper

  • Multimedia Multimodal Geocoding
    LI, L. T. ; PEDRONETTE, D. C. G. ; ALMEIDA, J. ; PENATTI, O. A. B. ; CALUMBY, R. T. ; TORRES, R. da S.
    In: ACM SIGSPATIAL International Conference on Advances in Geographic Information Systems (ACM SIGSPATIAL GIS), Redondo Beach, California, USA, 2012. p. 474-477.
    Abstract   |    Paper

  • A Visual Approach for Video Geocoding using Bag-of-Scenes
    PENATTI, O. A. B. ; LI, L. T. ; ALMEIDA, J. ; TORRES, R. da S.
    In: ACM International Conference on Multimedia Retrieval (ICMR), Hong Kong, China, 2012, p. 53:1-53:8.
    Abstract   |    Paper   |    PDF

  • Improving Texture Description in Remote Sensing Image Multi-Scale Classification Tasks By Using Visual Words
    SANTOS, J. A. dos ; PENATTI, O. A. B. ; TORRES, R. da S. ; P-H. GOSSELIN ; PHILIPP-FOLIGUET, S. ; FALCÃO, A. X.
    In: International Conference on Pattern Recognition (ICPR), Tsukuba Science City, Japan, 2012, p. 3090-3093.
    Abstract   |    Paper

  • Comparative Study of Global Color and Texture Descriptors for Web Image Retrieval
    PENATTI, O. A. B. ; VALLE E. ; TORRES, R. da S.
    In: Journal of Visual Communication and Image Representation, volume 23, number 2, p. 359-380, 2012.
    Abstract (JVCI Best Paper Award Runner Up 2014)  |  Paper |  Journal's Hottest Article: 11th (2014), 5th (2013), 1st (2012).

  • Encoding spatial arrangement of visual words
    PENATTI, O. A. B. ; VALLE, E. ; TORRES, R. da S.
    In: Iberoamerican Congress on Pattern Recognition (CIARP), Pucón, Chile, 2011, p. 240-247 (LNCS 7042)
    Abstract (Best Paper Award)   |    Paper

  • User-oriented evaluation of color descriptors for Web image retrieval
    PENATTI, O. A. B. ; TORRES, R. da S.
    In: European Conference on Research and Advanced Technology for Digital Libraries (ECDL), Glasgow, Scotland, 2010, p. 486-489.
    Abstract   |    Paper

  • Eva - An Evaluation Tool for Comparing Descriptors in Content-based Image Retrieval Tasks
    PENATTI, O. A. B. ; TORRES, R. da S.
    In: 11th ACM SIGMM International Conference on Multimedia Information Retrieval (MIR), Philadelphia, Pennsylvania, USA, 2010, p. 413-416.
    Abstract   |    Paper    |    Eva tool

  • Evaluating the Potential of Texture and Color Descriptors for Remote Sensing Image Retrieval and Classification
    SANTOS, J. A. dos ; PENATTI, O. A. B. ; TORRES, R. da S.
    In: Proceedings of International Conference on Computer Vision Theory and Applications (VISAPP), Angers, France, 2010, p. 203-210.
    Abstract   |    Paper

  • Color Descriptors for Web Image Retrieval: a Comparative Study
    PENATTI, O. A. B. ; TORRES, R. da S.
    In: XXI Brazilian Symposium on Computer Graphics and Image Processing (SIBGRAPI), Campo Grande, MS, Brazil, 2008, p. 163-170.
    Abstract   |    Paper

  • Recuperação de Imagens: Desafios e Novos Rumos (Image retrieval: Challenges and new trends)
    TORRES, R. da S. ; ZEGARRA, J. A. M. ; SANTOS, J. A. ; FERREIRA, C. D. ; PENATTI, O. A. B. ; ANDALO, F. A. ; ALMEIDA JUNIOR, J. G.
    In: XXXV Seminário Integrado de Software e Hardware, Belém, PA, Brazil, 2008, p. 223-237.
    Abstract   |    Paper

  • Spatial relationship descriptor based on partitions (Descritor de Relacionamento Espacial Baseado em Partições)
    PENATTI, O. A. B. ; TORRES, R. da S.
    In: Electronic Magazine of Undergraduate Research Projects (REIC-SBC), v. VII, p. 3, 2007. In Portuguese
    Abstract (in pt-br)   |    Paper

Working notes:

  • [MediaEval 2016 - Placing Task] RECOD @ Placing Task of MediaEval 2016: A Ranking Fusion Approach for Geographic-Location Prediction of Multimedia Objects
    MUNOZ, J. A. V. ; LI, L. T. ; DOURADO, I. C. ; NOGUEIRA, K. ; FADEL, S. G. ; PENATTI, O. A. B. ; ALMEIDA, J. ; PEREIRA, L. A. M. ; CALUMBY, R. T. ; SANTOS, J. A. dos ; TORRES, R. da S.
    In: Working Notes Proceedings of the MediaEval Workshop, Hilversum, Netherlands, 2016, v. 1739.
    PDF

  • [MediaEval 2016 - Diversity Task] Recod @ MediaEval 2016: Diverse Social Images Retrieval
    FERREIRA, C. D. ; CALUMBY, R. T. ; ARAUJO, I. B. A. C. ; DOURADO, I. C. ; MUNOZ, J. A. V. ; PENATTI, O. A. B. ; LI, L. T. ; ALMEIDA, J. ; TORRES, R. da S.
    In: Working Notes Proceedings of the MediaEval Workshop, Hilversum, Netherlands, 2016, v. 1739.
    PDF

  • [MediaEval 2015 - Placing Task] RECOD @ Placing Task of MediaEval 2015
    LI, L. T. ; MUNOZ, J. A. V. ; ALMEIDA, J. ; CALUMBY, R. T. ; PENATTI, O. A. B. ; DOURADO, I. C. ; NOGUEIRA, K. ; MENDES JR, P. R. ; PEREIRA, L. A. M. ; PEDRONETTE, D. C. G. ; SANTOS, J. A. dos ; GONÇALVES, M. A. ; TORRES, R. da S.
    In: Working Notes Proceedings of the MediaEval Workshop, Wurzen, Germany, 2015, v. 1463.
    PDF

  • [MediaEval 2015 - Diversity Task] Recod @ MediaEval 2015: Diverse Social Images Retrieval
    CALUMBY, R. T. ; ARAUJO, I. B. A. do C. ; SANTANA, V. P. ; MUNOZ, J. A. V. ; PENATTI, O. A. B. ; LI, L. T. ; ALMEIDA, J. ; CHIACHIA G. ; GONÇALVES, M. A. ; TORRES, R. da S.
    In: Working Notes Proceedings of the MediaEval Workshop, Wurzen, Germany, 2015, v. 1463.
    PDF

  • [MediaEval 2014 - Placing Task] Multimedia Geocoding: The RECOD 2014 Approach
    LI, L. T. ; PENATTI, O. A. B. ; ALMEIDA, J. ; CHIACHIA G. ; CALUMBY, R. T. ; MENDES JR, P. R. ; PEDRONETTE, D. C. G. ; TORRES, R. da S.
    In: Working Notes Proceedings of the MediaEval Workshop, Barcelona, Spain, 2014, v. 1263.
    PDF (Best overall results for 100m precision range) - Distinctive Mention for multimodality

  • [MediaEval 2014 - Diversity Task] Recod @ MediaEval 2014: Diverse Social Images Retrieval
    CALUMBY, R. T. ; SANTANA, V. P. ; CORDEIRO, F. S. ; PENATTI, O. A. B. ; LI, L. T. ; CHIACHIA G. ; TORRES, R. da S.
    In: Working Notes Proceedings of the MediaEval Workshop, Barcelona, Spain, 2014, v. 1263.
    PDF

  • [MediaEval 2013 - Placing Task] Multimodal Image Geocoding: The 2013 RECOD's Approach
    LI, T. L. ; ALMEIDA, J. ; PENATTI, O. A. B. ; CALUMBY, R. T. ; PEDRONETTE, D. C. G. ; GONÇALVES, M. A. ; TORRES, R. da S.
    In: Working Notes Proceedings of the MediaEval Workshop, Barcelona, Spain, 2013, v. 1043.
    PDF

  • [MediaEval 2012 - Placing Task] A Multimodal Approach for Video Geocoding
    LI, L. T. ; ALMEIDA, J. ; PEDRONETTE, D. C. G. , PENATTI, O. A. B. ; TORRES, R. da S.
    In: Working Notes Proceedings of the MediaEval Workshop, Pisa, Italy, 2012, v. 927.
    PDF (Best results of visual-based geocoding)

  • [MediaEval 2012 - Tagging Task] UNICAMP-UFMG at MediaEval 2012: Genre Tagging Task
    ALMEIDA J. ; SALLES, T. ; MARTINS, E. F. ; PENATTI, O. A. B. ; TORRES, R. da S. ; GONÇALVES, M. A. ; ALMEIDA J. M.
    In: Working Notes Proceedings of the MediaEval Workshop, Pisa, Italy, 2012, v. 927.
    PDF


Courses: (in portuguese)

  • Programa de Estágio Docente (PED)
    Disciplina MC102: Algoritmos e Programação de Computadores
    1º semestre 2010
    Turmas: K e L (Engenharia de Alimentos) - (site)

  • Programa de Estágio Docente (PED)
    Disciplina MC102: Algoritmos e Programação de Computadores
    1º semestre 2008
    Turmas: Q, R, S e T (Engenharia de Computação)

  • Programa de Estágio Docente (PED)
    Disciplina MC102: Algoritmos e Programação de Computadores
    2º semestre 2007
    Turmas: O e P (Engenharia Química)

Links:


Disclaimer: This page is not an official Unicamp publication. Its content is of responsibility of Otávio Penatti.