Dr Angel D. Sappa's home page

Member of MSIAU group

Angel D. Sappa, Ph.D.
Senior Researcher

Edifici O Campus UAB
08193 - Bellaterra (Cerdanyola del Valles)
Barcelona, Spain

Email: angel dot sappa [at] cvc dot uab dot es
Tel: +34 93 581 4905
Fax: +34 93 581 1670

**Warning: the information published herein is for the personal use of the reader. Copyright and all rights are retained by authors or by other copyright holders. Making copies of the information in full or in any portion for purposes other than own use is a violation of copyright.

International Journals

		Soria X., Sappa A., Humanante P. and Akbarinia A., "Dense extreme inception network for edge detection", Elsevier Pattern Recognition, Vol. 139, February 2023, pp. 1-12.
		Mehri A., Behjati P. and Sappa A., "TnTViT-G: Transformer in Transformer Network for Guidance Super Resolution", IEEE Access, Vol. 11, February 2023, pp. 11529-11540.
		Rato D., Oliveira M., Santos V., Gomes M. and Sappa A., "A Sensor-to-Pattern Calibration Framework for Multi-Modal Industrial Collaborative Cells", Elsevier Journal of Manufacturing Systems, Vol. 64, August 2022, pp. 497-507.
		Soria X., Pomboza G. and Sappa A., "LDC: Lightweight Dense CNN for Edge Detection", IEEE Access, Vol. 10, June 2022, pp. 68281-68290.
		Rivadeneira R., Sappa A., Vintimilla B. and Hammoud R., "A Novel Domain Transfer-Based Approach for Unsupervised Thermal Image Super-Resolution", Sensors, Vol. 22, No. 6, March 2022, pp. 1-14.
		Santos V., Sappa A., Oliveira M. and de la Escalera A., "Special Issue on Autonomous Driving and Driver Assistance Systems", Robotics and Autonomous Systems, Vol. 144, October 2021, pp 1-3.
		Velesaca H., Suárez P., Mira R. and Sappa A., “Computer Vision based Food Grain Classification: a Comprehensive Survey”, Computers and Electronics in Agriculture, Vol. 187, August 2021, pp 1-13.
		Charco J., Sappa A., Vintimilla B. and Velesaca O., “Camera pose estimation in multi-view environments: From virtual scenarios to the real world”, Image and Vision Computing, Vol. 110, June 2021, pp 1-12.
		Morera A., Sánchez Á., Moreno A. B., Sappa A. and Vélez J., "SSD vs. YOLO for Detection of Outdoor Urban Advertising Panels under Multiple Variabilities", Sensors, Vol. 20, No. 16, August 2020, pp. 1-23.
		Aguilera C. A., Aguilera C., Navarro C. and Sappa A., "Fast CNN Stereo Depth Estimation through Embedded GPU Devices", Sensors, Vol. 20, No. 11, June 2020, pp. 1-12.
		Santos V., Sappa A., Oliveira M. and de la Escalera A., "Special Issue on Autonomous Driving and Driver Assistance Systems", Robotics and Autonomous Systems, Vol. 121, August 2019.
		Aguilera C. A., Aguilera C. and Sappa A., "Melamine Faced Panels Defect Classification beyond the Visible Spectrum", Sensors, Vol. 18, No. 11, October 2018, pp. 1-10.
		Soria X., Sappa A. and Hammoud R., "Wide-Band Color Imagery Restoration for RGB-NIR Single Sensor Images", Sensors, Vol. 18, No. 4, June 2018, pp. 1-17.
		Santos V., Sappa A. and Oliveira M., "Special Issue on Autonomous Driving and Driver Assistance Systems", Robotics and Autonomous Systems, Vol. 91, May 2017, pp. 208-209.
		Aguilera C. A., Sappa A., Aguilera C. and Toledo R., "Cross-Spectral Local Descriptors via Quadruplet Network", Sensors, Vol. 17, No. 4, April 2017, pp. 1-14.
		Sappa A., Aguilera C., Carvajal J., Oliveira M., Romero D., Vintimilla B. and Toledo R., "Monocular visual odometry: A cross-spectral image fusion based approach", Robotics and Autonomous Systems, Vol. 85, November 2016, pp. 26-36.
		Oliveira M., Santos V., Sappa A., Dias P. and Moreira A., "Incremental texture mapping for autonomous driving", Robotics and Autonomous Systems, Vol. 84, October 2016, pp. 113-128.
		Oliveira M., Santos V., Sappa A., Dias P. and Moreira A., "Incremental Scenario Representations for Autonomous Driving using Geometric Polygonal Primitives", Robotics and Autonomous Systems, Vol. 83, September 2016, pp. 312-325.
		Sappa A., Carvajal J., Aguilera C., Oliveira M., Romero D. and Vintimilla B., "Wavelet based visible and infrared image fusion: a comparative study", Sensors, Vol. 16, No. 6, June 2016, pp. 1-15.
		Mouats T., Aouf N., Sappa A., Aguilera C. and Toledo R., "Multi-Spectral Stereo Odometry", IEEE Transactions on Intelligent Transportation Systems, Vol. 16, No. 3, June 2015, pp. 1210-1224.
		Oliveira M., Santos V. and Sappa A., "Multimodal Inverse Perspective Mapping", Information Fusion, Vol. 24, July 2015, pp. 108-121.
		Onkarappa N. and Sappa A., "Synthetic sequences and ground-truth flow field generation for algorithm validation", Multimedia Tools and Applications, Vol. 74, No. 9, May 2015, pp. 3121-3135.
		Oliveira M., Sappa A. and Santos V., "A probabilistic approach for color correction in image mosaicking applications", IEEE Transactions on Image Processing, Vol. 14, No. 2, January 2015, pp. 508-523.
		Piñol M., Sappa A. and Toledo R., “Adaptive Feature Descriptor Selection based on a Multi-Table Reinforcement Learning Strategy”, Neurocomputing, Vol. 150, Part A, February 2015, pp. 106-115.
		Rouhani M., Sappa A. and Boyer E., "Implicit B-Spline Surface Reconstruction", IEEE Transactions on Image Processing, Vol. 14, No. 1, January 2015, pp. 22-32.
		Ricaurte P., Chilán C., Aguilera-Carrasco C., Vintimilla B. and Sappa A., “Feature Point Descriptors: Infrared and Visible Spectra”, Sensors, Vol. 14, No. 2, February 2014, pp. 3690-3701.
		Onkarappa N. and Sappa A., "Speed and texture: an empirical study on optical flow accuracy in ADAS scenarios", IEEE Transactions on Intelligent Transportation Systems, Vol. 15, No. 1, February 2014, pp. 136-147.
		Rouhani M. and Sappa A., “The Richer Representation the Better Registration”, IEEE Transactions on Image Processing, Vol. 22, No. 12, December 2013, pp. 5036-5049.
		Onkarappa N. and Sappa A., "A Novel Space Variant Image Representation", Journal of Mathematical Imaging and Vision, Vol. 47, No.1, September 2013, pp. 48-59.
		Barrera F., Lumbreras F. and Sappa A., "Multispectral Piecewise Planar Stereo using Manhattan-World Assumption", Pattern Recognition Letters, Vol. 34, No.1, January 2013, pp. 52-61.
		Aguilera C., Barrera F., Lumbreras F., Sappa A., and Toledo R., “Multispectral Image Feature Points”, Sensors, Vol 12, No. 9, September 2012, pp. 12661-12672.
		Barrera F., Lumbreras F. and Sappa A., "Multimodal Stereo Vision System: 3D Data Extraction and Algorithm Evaluation", IEEE Journal of Selected Topics in Signal Processing, Vol. 6, No. 5, September 2012, pp. 437-446.
		Rouhani M. and Sappa A., “Implicit Polynomial Representation through a Fast Fitting Error Estimation”, IEEE Transactions on Image Processing, Vol. 21, No. 4, April 2012, pp. 2089-2098.
		Dornaika F., Alvarez J., Sappa A. and López A., “A New Framework for Stereo Sensor Pose through Road Segmentation and Registration”, IEEE Transactions on Intelligent Transportation Systems, Vol. 12, No. 4, December 2011, pp. 954-966.
		Julià C., Sappa A., Lumbreras F., Serrat J. and López A., “Rank Estimation in Missing Data Matrix Problems”, Journal of Mathematical Imaging and Vision, Vol. 39, No. 2, February 2011, pp. 140-160.
		Julià C., Lumbreras F., and Sappa A., “A Factorization-based Approach to Photometric Stereo”, International Journal of Imaging Systems and Technology, Vol. 21, No. 1, February 2011, pp. 115-119.
		Gerónimo D., López A., Sappa A. and Graf T., “Survey of Pedestrian Detection for Advanced Driver Assistance Systems”, IEEE Transactions on Pattern Analysis and Machine Intelligence, Vol. 32, No. 7, July 2010, pp. 1239-1258.
		Gerónimo D., Sappa A., Ponsa D. and López A., “2D-3D Based On-Board Pedestrian Detection System”, Computer Vision and Image Understanding, Vol 114, No. 5, May 2010, pp. 583-595.
		Julià C., Sappa A., Lumbreras F., Serrat J. and López A., “An iterative multiresolution scheme for SFM with missing data: single and multiple object scenes”, Image and Vision Computing, Vol. 28, No. 1, January 2010, pp. 164-176.
		Julià C., Sappa A., Lumbreras F., Serrat J. and López A., “Predicting Missing Ratings in Recommender Systems: Adapted Factorization Approach”, International Journal of Electronic Commerce, Vol. 14, No. 2, Winter 2009-2010, pp. 89-108.
		Julià C., Sappa A., Lumbreras F., Serrat J. and López A., “An Iterative Multiresolution Scheme for SFM with Missing Data”, Journal of Mathematical Imaging and Vision, Vol. 34, No. 3, July 2009, pp. 240-258.
		Dornaika F. and Sappa A., "A Featureless and Stochastic Approach to On-board Stereo Vision System Pose", Image and Vision Computing, Vol. 27, No. 9, August 2009, pp. 1382-1393.
		Dornaika F. and Sappa A., "Instantaneous 3D Motion from Image Derivatives using the Least Trimmed Square Regression", Pattern Recognition Letters, Vol. 30, No. 5, April 2009, pp. 535-543.
		Sappa A., Dornaika F., Ponsa D., Gerónimo D. and López A., “An Efficient Approach to On-Board Stereo Vision System Pose Estimation”, IEEE Transactions on Intelligent Transportation Systems, Vol. 9, No. 3, Sept. 2008, pp. 476-490.
		Dornaika F. and Sappa A., “Evaluation of an Appearance-based 3D Face Tracker using Dense 3D Data”, Machine Vision and Applications. Vol. 19, No. 5-6, October 2008, pp. 427-441.
		Berti H., Sappa A. and Agamennoni O., “Improved Dynamic Window Approach by Using Lyapunov Stability Criteria”, Latin American Applied Research, Vol. 38, No. 4, October 2008, pp. 289-298.
		Julià C., Sappa A., Lumbreras F., Serrat J. and López A., “Rank Estimation in 3D Multibody Motion Segmentation”, IEE Electronics Letters. Vol. 44, No. 4, February 2008, pp. 279-280.
		Dornaika F. and Sappa A., “Rigid and Non-rigid Face Motion Tracking by Aligning Texture Maps and Stereo 3D Models”, Pattern Recognition Letters. Vol 28, No. 15, November 2007, pp. 2116-2126.
		Sappa A. and Garcia M. A., “Incremental Integration of Multiresolution Range Images”, The Imaging Science Journal. Vol. 55, No. 3, pp. 127-139.
		Sappa A. and Vintimilla B., “Cost-Based Closed Contour Representations”, SPIE Journal of Electronic Imaging. Vol. 16, No. 2, 023009, April-June 2007.
		Sappa A. and Garcia M. A., “Coarse-to-Fine Approximation of Range Images with Bounded Error Adaptive Triangular Meshes”, SPIE Journal of Electronic Imaging. Vol. 16, No. 2, 023010, April-June 2007.
		Sappa A. and Garcia M. A., “Generating Compact Representations of Static Scenes by Means of 3D Object Hierarchies”, The Visual Computer, Vol. 23, No. 2, February 2007, pp. 143-154.
		Sappa A., “Splitting up Panoramic Range Images into Compact 2½D Representations”, International Journal of Imaging Systems and Technology, Vol. 16, No. 3, December 2006, pp. 85-91.
		Sappa A., Gerónimo D., Dornaika F. and López A., “On-board Camera Extrinsic Parameter Estimation”, IEE Electronics Letters, Vol. 42, No. 13, June 2006, pp. 745-746.
		Sappa A., “Unsupervised Contour Closure Algorithm for Range Image Edge-Based Segmentation”, IEEE Transactions on Image Processing, Vol. 15, No. 2, February 2006, pp. 377-384.
		Restrepo-Spetch A., Sappa A. and Devy M. “Edge Registration Versus Triangular Mesh Registration, a Comparative Study”, Signal Processing: Image Communication, Vol. 20, No. 9-10, October-November 2005, pp. 853-868.
		Garcia M. A. and Sappa A., “Efficient Generation of Discontinuity-Preserving Adaptive Triangulations from Range Images”, IEEE Transactions on Systems, Man, and Cybernetics (Part B), Vol. 34, No. 5, October 2004, pp. 2003-2014.

Books

		Sappa A. (Editor), "ICT Applications for Smart Cities", Intelligent Systems Reference Library, Springer Verlag, Vol 224, Springer Verlag, 2022.
		Teutsch M., Sappa A., and Hammoud R., "Computer Vision in the Infrared Spectrum: Challenges and Approaches", Synthesis Lectures on Computer Vision, October 2021, Vol. 10, No. 2 , Pages 1-138.
		Sappa A. and Vitrià J. (Editors), "Multimodal Interaction in Image and Video Applications", Intelligent Systems Reference Library, Vol 48, Springer Verlag, 2013.
		Sappa A. and Triantafyllidis G.A. (Editors), "Computer Graphics and Imaging", Crete, Greece, June 2012. ISBN: 978-0-88986-921-9.
		Sappa A. (Editor), "Computer Graphics and Imaging", Innsbruck, Austria, Febrary 2010. ISBN: 978-0-88986-824-3.

Book Chapters

Charco J., Sappa A., Vintimilla B. and H Velesaca, “Human Body Pose Estimation in Multi-view Environments”, chapter 5 in ICT Applications for Smart Cities, Book edited by: A. Sappa, Springer Verlag, Vol 224, September 2022, pp. 79-99.

Velesaca H., Suárez P., Carpio D. Rivadeneira R., Sánchez Á. and Sappa A., “Video Analytics in Urban Environments: Challenges and Approaches”, chapter 6 in ICT Applications for Smart Cities, Book edited by: A. Sappa, Springer Verlag, Vol 224, September 2022, pp. 101-121.

Suárez P., Sappa A., Vintimilla B., “Deep learning-based vegetation index estimation”, chapter 9 in Generative Adversarial Networks for Image-to-Image Translation, Book edited by: A. Solanki, A. Nayyar and M. Naved, Elsevier, June 2021, pp. 205-234.

Aguilera C., Ramos M., and Sappa A., “Simulated Annealing: A Novel Application of Image Processing in the Wood Area”, chapter 5 in Simulated Annealing - Advances, Applications and Hybridizations, Book edited by: Marcos de Sales Guerra Tsuzuki, August 2012, pp. 91-104. (Open Access).

Sappa A., Gerónimo D., Dornaika F., Rouhani M. and López A., “Moving object detection from mobile platforms using stereo data registration”, chapter 3 in Computational Intelligence paradigms in advanced pattern classification, Ed. Marek R. Ogiela and Lakhmi C. Jain, Springer-Verlag's Book Series, 2012, pp. 25-37.

Gerónimo D., Sappa A., and López A., “Stereo-based Candidate Generation for Pedestrian Protection Systems”, chapter 9 in Binocular Vision: Development, Depth and Disorders, Book edited by: Jacques McCoun and Lucien Reeves, NOVA Publishers, July 2010, pp. 189-208.

Sappa A., Aifanti N., Malassiotis S. and Strintzis M. G., “Prior Knowledge Based Motion Model Representation”, chapter 16 in Progress in Computer Vision and Image Analysis, Ed. H. Bunke et al., World Scientific, August 2009, pp. 283-299 (invited paper from ELCVIA).

Aifanti N., Sappa A., Grammalidis N and Malassiotis S, “Advances in Tracking and Recognition of Human Motion”, Encyclopedia of Information Science and Technology, 2nd. Edition, 2009, pp. 65-71.

Dornaika F. and Sappa A., “Real Time Stereo Image Registration for Planar Structure and 3D Sensor Pose Estimation”, chapter 18 in Stereo Vision, Book edited by: Asim Bhatti, November 2008, pp. 299-316. (Open Access).

Dornaika F. and Sappa A., “Improving Appearance-Based 3D Face Tracking Using Sparse Stereo Data”, book chapter, Advances in Computer Graphics and Computer Vision, Ed. J. Braz, A. Ranchordas, H. Araújo and J. Jorge, Springer Verlag, 2007, pp. 354-366, (best papers VISAPP 2006).

Sappa A., Gerónimo D., Dornaika F. and López A., “Stereo Vision Camera Pose Estimation for On-Board Applications”, chapter 3 in Scene Reconstruction, Pose Estimation and Tracking, Book edited by: Rustam Stolking, 2007, pp. 39-50. (Open Access).

Dornaika F. and Sappa A., “SFM for Planar Scenes: a Direct and Robust Approach”, book chapter, Informatics in Control, Automation and Robotics II, Ed. J. Filipe, J. Ferrier, J. Cetto and M. Carvalho, Springer Verlag, 2007, pp. 129-136. (best papers ICINCO 2005).

Sappa A., Aifanti N., Grammalidis N and Malassiotis S, “Survey of 3D Human Body Representations”, Encyclopedia of Information Science and Technology I-V, 2005.

Aifanti N., Sappa A., Grammalidis N and Malassiotis S, “Human Motion Tracking and Recognition”, Encyclopedia of Information Science and Technology I-V, 2005.

Sappa A., Aifanti N., Malassiotis S. and Strintzis M. G., “Prior Knowledge Based Motion Model Representation”, Electronic Letters on Computer Vision and Image Analysis 5(3):55-67, Special Issue on Articulated Motion & Deformable Objects, August 2005.

Sappa A., Aifanti N., Grammalidis N and Malassiotis S, “Advances in Vision-Based Human Body Modeling”, chapter one in: 3D Modeling and Animation:Systhesis and Analysis Techniques for the Human Body, N. Sarris and M. Strintzis, pp. 1-26, 2004.

Garcia M. A. and Sappa A., “Adaptive Triangulation of Range Images”, CVonline (Computer Vision on line), http://homepages.inf.ed.ac.uk/rbf/CVonline/.

International Conferences

Suárez P. and Sappa A., “Toward a Thermal Image-Like Representation”, 18th Int. Conf. on Computer Vision Theory and Applications, Lisbon, Portugal, February 19-21, 2023, pp 133-140.

Suárez P., Carpio D., Sappa A. and Velesaca H., “Transformer based Image Dehazing”, 16th IEEE Int. Conf. on Signal Image Technology & Internet Based System, Dijon, France, October 19-21, 2022.

Suárez P., Sappa A., Carpio D., Velesaca H., Burgos F. and Urdiales P., “Deep Learning based Shrimp Classification”, 17th International Symposium on Visual Computing (ISVC’22), LNCS 13598, Springer Verlag, San Diego, CA, USA, October 3-5, 2022.

Velesaca H., Suárez P., Sappa A., Carpio D., Rivadeneira R. and Sánchez Á., “Review on Common Techniques for Urban Environment Video Analytics”, 3rd Brazilian Workshop on Smart Cities (WBCI2022), Niterói, RJ, Brazil, 2022.

Sappa A., Suárez P., Velesaca H. and Carpio D., “Domain Adaptation in Image Dehazing: Exploring the Usage of Images from Virtual Scenarios”, 16th International Conference on Computer Graphics, Visualization, Computer Vision and Image Processing, Lisbon, Portugal, July 20-22, 2022, pp. 85-92.

Rivadeneira R., Sappa A., Vintimilla B., Kim J., Kim D., Li Z., Jian Y., Yan B., Cao L., Qi F., Wang H., Wu R., Sun L., Zhao Y., Li L., Wang K., Wang Y., Zhang X., Wei H., Lv C., Sun Q., Tian X., Jia Z., Hu J., Wang C., Zhong Z., Liu X. and Jiang J., “Thermal Image Super-Resolution Challenge Results - PBVS 2022”, IEEE Int. Conf. on Computer Vision and Pattern Recognition (CVPR) Workshops, New Orleans, Louisiana, USA, June 19-24, 2022, pp. 418-426.

Rangnekar A., Mulhollan Z., Vodacek A., Hoffman M., Sappa A., Blasch E., Yu J., Zhang L., Du S., Chang H., Lu K., Zhang Z., Gao F., Yu Y., Shuang F., Wang L., Ling Q., Shyam P., Yoon K. and Kim K., “Semi-Supervised Hyperspectral Object Detection Challenge Results - PBVS 2022”, IEEE Int. Conf. on Computer Vision and Pattern Recognition (CVPR) Workshops, New Orleans, Louisiana, USA, June 19-24, 2022, pp. 390-398.

Low S., Nina O., Sappa A. and Blasch E., “Multi-modal Aerial View Object Classification Challenge Results - PBVS 2022”, IEEE Int. Conf. on Computer Vision and Pattern Recognition (CVPR) Workshops, New Orleans, Louisiana, USA, June 19-24, 2022, pp. 350-358.

Rivadeneira R., Sappa A. and Vintimilla B., “Multi-Image Super-Resolution for Thermal Images”, 17th Int. Conf. on Computer Vision Theory and Applications, Online, February 6-8, 2022, pp 635-642.

Charco J., Sappa A., Vintimilla B. and Velesaca O., “Human Pose Estimation through a Novel Multi-view Scheme”, 17th Int. Conf. on Computer Vision Theory and Applications, Online, February 6-8, 2022, pp 855-862.

Velesaca H., Suárez P., Carpio D., and Sappa A., “Synthesized Image Datasets: Towards an Annotation-Free Instance Segmentation Strategy”, 16 Int. Symposium on Visual Computingth , LNCS 13017, Springer Verlag, Virtutal, October 4-6, 2021, pp. 131-143.

Suárez P., Carpio D., and Sappa A., “Non-homogeneous Haze Removal Through a Multiple Attention Module Architecture”, 16 Int. Symposium on Visual Computingth , LNCS 13018, Springer Verlag, Virtutal, October 4-6, 2021, pp. 178-190.

Suárez P., Sappa A. and Vintimilla B., “Cycle Generative Adversarial Network: Towards A Low-Cost Vegetation Index Estimation”, IEEE Int. Conf. on Images Processing, Anchorage-Alaska, USA, September 19-22, 2021.

Rivadeneira R., Sappa A., Vintimilla B., Nathan S., Kansal P., Mehri A., Ardakani P., Dalal A., Akula A., Sharma D., Pandey S., Kumar B., Yao J., Wu R., Feng K., Li N., Zhao Y., Patel H., Chudasama V., Prajapati K., Sarvaiya A., Upla K., Raja K., Ramachandra R., Busch C., Almasri F., Vandamme T., Debeir O., Gutierrez N., Nguyen Q, and Beksi W., “Thermal Image Super-Resolution Challenge - PBVS 2021”, IEEE Int. Conf. on Computer Vision and Pattern Recognition (CVPR) Workshops, Virtual, June 19-25, 2021.

Mehri A. Ardakani P. and Sappa A., “MPRNet: Multi-Path Residual Network for Lightweight Image Super Resolution”, IEEE Winter Conference on Applications of Computer Vision (WACV), January 5-9, 2021.

Mehri A., Ardakani P. and Sappa A., “LiNet: A Lightweight Network for Image Super Resolution”, Int. Conf. on Pattern Recognition (ICPR), Milano, Italy, January 10-15, 2021.

Velesaca H., Araujo S., Suárez P., Sanchez Á. and Sappa A., “Off-the-Shelf Based System for Urban Environment Video Analytics”, IEEE 27th International Conference on Systems, Signals and Image Processing, Niteroi, Rio de Janeiro, Brazil, July 1-3, 2020.

Velesaca H., Mira R., Suárez P., Larrea C., and Sappa A., “Deep Learning Based Corn Kernel Classification”, IEEE Int. Conf. on Computer Vision and Pattern Recognition (CVPR) Workshops, Seattle, Washington, United States, June 14-19, 2020.

Rivadeneira R., Sappa A., Vintimilla B., Guo L., Hou J., Mehri A., Ardakani P., Patel H., Chudasama V., Prajapati K., Upla K., Ramachandra R., Raja K., Busch C., Almasri F., Debeir O., Nathan S., Kansal P., Gutierrez N., Mojra B., Beksi W., “Thermal Image Super-Resolution Challenge - PBVS 2020”, IEEE Int. Conf. on Computer Vision and Pattern Recognition (CVPR) Workshops, Seattle, Washington, United States, June 14-19, 2020.

Rivadeneira R., Sappa A. and Vintimilla B., “Thermal Image Super-resolution: A Novel Architecture and Dataset”, 15th Int. Conf. on Computer Vision Theory and Applications, Valletta, Malta, February 27-29, 2020, pp 111-119.

Charco J., Sappa A., Vintimilla B. and Velesaca O., “Transfer Learning from Synthetic Data in the Camera Pose Estimation Problem”, 15th Int. Conf. on Computer Vision Theory and Applications, Valletta, Malta, February 27-29, 2020, pp 498-505.

Soria X., Riba E. and Sappa A., “Dense Extreme Inception Network: Towards a Robust CNN Model for Edge Detection”, IEEE Winter Conference on Applications of Computer Vision, Aspen, Colorado, USA, March 2-5, 2020, pp 1923-1932.

Rivadeneira R., Suárez P., Sappa A. and Vintimilla B., “Thermal Image SuperResolution Through Deep Convolutional Neural Network”, 16th Int. Conf. on Images Analysis and Recognition, LNCS 11663, Springer Verlag, Waterloo, Canada, August 27-29, 2019.

Morera A., Sánchez A., Sappa A. and Vélez J, “Robust Detection of Outdoor Urban Advertising Panels in Static Images”, Int. Conf. on Practical Applications of Agents and Multi-Agent Systems, Ávila, Spain, June 26-28, 2019, pp 246-256.

Mehri A. and Sappa A., “Colorizing Near Infrared Images through a Cyclic Adversarial Approach of Unpaired Samples”, IEEE Int. Conf. on Computer Vision and Pattern Recognition (CVPR) Workshops, Long Beach, CA, USA, June 16-20, 2019.

Suárez P., Sappa A., Vintimilla B. and Hammoud R., “Image Vegetation Index through a Cycle Generative Adversarial Network”, IEEE Int. Conf. on Computer Vision and Pattern Recognition (CVPR) Workshops, Long Beach, CA, USA, June 16-20, 2019.

Soria X., Sappa A., “Improving Edge Detection in RGB Images by Adding NIR Channel”, 14th IEEE Int. Conf. on Signal Image Technology & Internet Based System, Las Palmas de Gran Canaria, Spain, November 26-29, 2018.

Suárez P., Sappa A., and Vintimilla B., “Cross-spectral image dehaze through a dense stacked conditional GAN based approach”, 14th IEEE Int. Conf. on Signal Image Technology & Internet Based System, Las Palmas de Gran Canaria, Spain, November 26-29, 2018.

Charco J., Vintimilla B. and Sappa A., “Deep learning based camera pose estimation in multi-view environment”, 14th IEEE Int. Conf. on Signal Image Technology & Internet Based System, Las Palmas de Gran Canaria, Spain, November 26-29, 2018.

Suárez P., Sappa A., Vintimilla B. and Hammoud R., “Near InfraRed Imagery Colorization”, IEEE Int. Conf. on Images Processing, Athens, Greece, October 7-10, 2018, pp. 2237-2241.

Suárez P., Sappa A., and Vintimilla B., “Vegetation Index Estimation from Monospectral Images”, 15th Int. Conf. on Images Analysis and Recognition, LNCS 10882, Springer Verlag, Póvoa de Varzim, Portugal, June 27-29, 2018, pp. 353-362.

Suárez P., Sappa A., Vintimilla B. and Hammoud R., “Deep Learning based Single Image Dehazing”, IEEE Int. Conf. on Computer Vision and Pattern Recognition (CVPR) Workshops, Salt Lake City, Utah, USA, June 18-22, 2018.

Soria X., Sappa A. and Akbarinia A., “Multispectral Single-Sensor RGB-NIR Imaging: New Challenges and Opportunities”, 7th International Conference on Image Processing Theory, Tools and Applications, Montreal, Canada, Nov. 28 - Dec. 1st 2017.

Suárez P., Sappa A. and Vintimilla B. “Colorizing Infrared Images through a Triplet Conditional DCGAN Architecture”, Int. Conf. on on Image Analysis and Processing, LNCS 10484, Springer Verlag, Catania, Italy, September 11-15, 2017, pp 287-297.

Suárez P., Sappa A. and Vintimilla B. “Infrared Image Colorization based on a Triplet DCGAN Architecture”, IEEE Int. Conf. on Computer Vision and Pattern Recognition (CVPR) Workshops, Honolulu, Hawaii, July 21-26, 2017. (Best Paper Award)

Suárez P., Sappa A. and Vintimilla B. “Learning to Colorize Infrared Images”, Int. Conf. on Practical Applications of Agents and Multi-Agent Systems, Porto, Portugal, June 21-23, 2017, pp 164-172.

Aguilera C.A., Soria X., Sappa A. and Toledo R., “RGBN Multispectral Images: A Novel Color Restoration Approach”, Int. Conf. on Practical Applications of Agents and Multi-Agent Systems, Porto, Portugal, June 21-23, 2017, pp 155-163.

Suárez P., Sappa A. and Vintimilla B. “Cross-Spectral Image Patch Similarity using Convolutional Neural Network”, IEEE Int. Workshop of Electronics, Control, Measurement, Signals and their application to Mechatronics, San Sebastian, Spain, May 24-26, 2017.

Valencia A., Idrovo R., Sappa A., Plaza D. and Ochoa D. “A 3D Vision Based Approach for Optimal Grasp of Vacuum Grippers”, IEEE Int. Workshop of Electronics, Control, Measurement, Signals and their application to Mechatronics, San Sebastian, Spain, May 24-26, 2017.

Carvajal J., Romero D., and Sappa A., “Fine-Tuning Based Deep Convolutional Networks for Lepidopterous Genus Recognition”, 21st Iberoamerican Congress on Pattern Recognition, LNCS 10125, Springer Verlag, Lima, Peru, November 8-11, 2016, pp 467-475.

Aguilera C.A., Aguilera F., Sappa A., Aguilera C. and Toledo R., “Learning cross-spectral similarity measures with deep convolutional neural networks”, IEEE Int. Conf. on Computer Vision and Pattern Recognition (CVPR) Workshops, Las vegas, USA, June 26-July 1, 2016.

Romero D., Frizera A., Sappa A., Vintimilla B. and Bastos T., “A predictive model for human activity recognition by observing actions and context”, Int. Conf. on Advanced Concepts for Intelligent Vision Systems, LNCS 9386, Springer Verlag, Catania, Italy, October 28-29, 2015, pp 323-333.

Oliveira M., Santos V., Sappa A. and Dias P., ““Scene Representations for Autonomous Driving: an approach based on polygonal primitives”, ROBOT'2015: Second Iberian Robotics Conference, Lisbon, Portugal, November 19-21, 2015, pp 503-515.

Poujol J., Aguilera-Carrasco C., Danos E., Vintimilla B., Toledo R. and Sappa A., “A Visible-Thermal Fusion based Monocular Visual Odometry”, ROBOT'2015: Second Iberian Robotics Conference, Lisbon, Portugal, November 19-21, 2015, pp 517-528.

Oliveira M., Seabra Lopes L., Hyun Lim G., Hamidreza Kasaei S., Sappa A. and Tomé A., “Concurrent Learning of Visual Codebooks and Object Categories in Openended Domains”, IEEE Int. Conf. on Intelligent Robots and Systems, Hamburg, Germany, September 28 - October 02, 2015, pp 2488-2495.

Aguilera C.A., Sappa A. and Toledo R., “LGHD: A Feature Descriptor for Matching Across Non-Linear Intensity Variations”, IEEE Int. Conf. on Image Processing, Quebec, Canada, September 27-30, 2015, pp 178-181.

Cruz M., Aguilera C.A., Vintimilla B., Toledo R. and Sappa A., “Cross-Spectral Image Registration and Fusion: an Evaluation Study”, Int. Conf. on Machine Vision and Machine Learning, Barcelona, Spain, July 13-14, 2015.

Rouhani M., Boyer E. and Sappa A., “Non-Rigid Registration meets Surface Reconstruction”, IEEE Int. Conf. on 3D Vision, Tokyo, Japan, December 8-11, 2014, pp. 617-624.

Ricaurte P., Chilán C., Aguilera-Carrasco C., Vintimilla B and Sappa A., “Performance Evaluation of Feature Point Descriptors in the Infrared Domain”, Int. Conf. on Computer Vision Theory and Applications, Lisbon, Portugal, January 5-8, 2014, vol 1, pp 545-550.

Onkarappa N., Aguilera-Carrasco C., Vintimilla B and Sappa A., “Cross-spectral Stereo Correspondence using Dense Flow Fields”, Int. Conf. on Computer Vision Theory and Applications, Lisbon, Portugal, January 5-8, 2014, vol 3, pp 613-617.

Amato A., Lumbreras F and Sappa A., “A General-purpose Crowdsourcing Platform for Mobile Devices”, Int. Conf. on Computer Vision Theory and Applications, Lisbon, Portugal, January 5-8, 2014, vol 3, pp 211-215.

Amato A., Sappa A., Fornés A., Lumbreras F. and Lladós J., “Divide and Conquer: atomizing and parallelizing a task in a mobile crowdsourcing platform", Int. ACM Workshop on Crowdsourcing for Multimedia, Barcelona, Spain, October 21-25, 2013, pp. 21-22.

Ros G., Guerrero J., Sappa A., Ponsa D. and López A., “Fast and Robust l₁-averaging-based Pose Estimation for Driving Scenarios”, British Machine Vision Conference, Bristol, United Kingdom, September 9-13, 2013.

Pistarelli M., Sappa A. and Toledo R., “Multispectral Stereo Image Correspondence”, Int. Conf. on Computer Analysis of Images and Patterns, York, LNCS 8048, Springer Verlag, UK, August 27-29, 2013, pp. 217-224.

Onkarappa N. and Sappa A., “Laplacian Derivative based Regularization for Optical Flow Estimation in Driving Scenario", Int. Conf. on Computer Analysis of Images and Patterns, LNCS 8048, Springer Verlag, York, UK, August 27-29, 2013, pp. 483-490.

Ros G., Guerrero J., Sappa A., Ponsa D. and López A., “VSLAM pose initialization via Lie groups and Lie algebras optimization”, IEEE International Conference on Robotics and Automation, Karlsruhe, Germany, May 6-10, 2013, pp. 5720-5727.

Vino G., and Sappa A., “Revisiting Harris Corner Detector Algorithm: a Gradual Thresholding Approach”, Int. Conf. on Image Analysis and Recognition, LNCS 7950, Springer Verlag, Póvoa de Varzim, Portugal, June 26-28, 2013, pp. 354-363.

Onkarappa N., Veerabhadrappa S. and Sappa A., “Optical Flow in Onboard Applications: A Study on the Relationship Between Accuracy and Scene Texture", International Conference on Signal and Image Processing, LNEE 221, Springer Verlag, Coimbatore, India, December 13-15, 2012, pp. 257-267.

Piñol M., Sappa A. and Toledo R., “Multi-Table Reinforcement Learning for Visual Object Recognition”, International Conference on Signal and Image Processing, LNEE 221, Springer Verlag, Coimbatore, India, December 13-15, 2012, pp. 469-480.

Rouhani M. and Sappa A., “Non-Rigid Shape Registration: A Single Linear Least Squares Framework” European Conference on Computer Vision, LNCS 7578, Springer Verlag, Firenze, Italy, October 7-13, 2012, pp. 264-277.

Oliveira M., Santos V. and Sappa A., “Short term path planning using a multiple hypothesis evaluation approach for an autonomous driving competition”, IEEE 4th Workshop on Planning,Perception and Navigation for Intelligent Vehicles, Vilamoura, Algarve, Portugal, October 7th, 2012.

Ros G., Sappa A., Ponsa D. and López A., “Visual SLAM for Driverless Cars: A Brief Survey”, IEEE Workshop on Navigation, Perception, Accurate Positioning and Mapping for Intelligent Vehicles, Alcalá de Henares, Spain, June 3, 2012.

Piñol M., Sappa A., López A. and Toledo R., “Feature Selection Based on Reinforcement Learning for Object Recognition”, Adaptive Learning Agents Workshop, Valencia, Spain, June 4-8, 2012, pp. 33-39.

Onkarappa N. and Sappa A., “An Empirical Study on Optical Flow Accuracy Depending on Vehicle Speed", IEEE Intelligent Vehicles Symposium, Alcalá de Henares, Spain, June 3-7, 2012, pp. 1138-1143.

Oliveira M., Sappa A. and Santos V., “Color Correction for Onboard Multi-camera Systems using 3D Gaussian Mixture Models”, IEEE Intelligent Vehicles Symposium, Alcalá de Henares, Spain, June 3-7, 2012, pp. 299-303.

Barrera F., Lumbreras F. and Sappa A., “Evaluation of Similarity Functions in Multimodal Stereo”, Int. Conf. on Image Analysis and Recognition, LNCS 7324, Springer Verlag, Aveiro, Portugal, June 25-27, 2012, pp. 320-329.

Oliveira M., Sappa A. and Santos V., “Color Correction using 3D Gaussian Mixture Models”, Int. Conf. on Image Analysis and Recognition, LNCS 7324, Springer Verlag, Aveiro, Portugal, June 25-27, 2012, pp. 97-106.

Barrera F., Lumbreras F., Aguilera C. and Sappa A., “Planar-Based Multispectral Stereo”, 11th Quantitative InfraRed Thermography, Naples, Italy, June 11-14, 2012.

Aguilera C., Barrera F., Sappa A., and Toledo R., “A Novel SIFT-Like-Based Approach for FIR-VS Images Registration”, 11th Quantitative InfraRed Thermography, Naples, Italy, June 11-14, 2012.

Rouhani M. and Sappa A., “Correspondence Free Registration through a Point-to-Model Distance Minimization”, IEEE Int. Conf. on Computer Vision, Barcelona, Spain, November 6-13, 2011, pp. 2150-2157.

Onkarappa N. and Sappa A., “Space Variant Representations for Mobile Platform Vision Applications”, Int. Conf. on Computer Analysis of Images and Patterns, LNCS Vol. 6855, Springer Verlag, Seville, Spain, August 29-31, 2011, pp. 146-154.

Rouhani M. and Sappa A., “Implicit B-Spline Fitting using the 3L Algorithm”, IEEE Int. Conf. on Image Processing, Brussels, Belgium, September 11-14, 2011, pp. 909-912.

Oliveira M., Sappa A. and Santos V., “Unsupervised Local Color Correction for Coarsely Registered Images”, IEEE Int. Conf. on Computer Vision and Pattern Recognition, Colorado Springs, USA, June 21-23, 2011, pp. 201-208.

Barrera F., Lumbreras F. and Sappa A., “Multimodal Template Matching Based on Gradient and Mutual Information Using Scale Space”, IEEE Int. Conf. on Image Processing, Hong Kong, September 26-29, 2010, pp. 2749-2752.

Rouhani M. and Sappa A., “A Fast Implicit Polynomial Fitting Approach”, IEEE Int. Conf. on Image Processing, Hong Kong, September 26-29, 2010, pp. 1429-1432.

Onkarappa N. and Sappa A., “On-Board Monocular Vision System Pose Estimation through a Dense Optical Flow”, Int. Conf. on Image Analysis and Recognition, LNCS Vol. 6111, Springer Verlag, Povoa de Varzim, Portugal, June 21-23, 2010, pp. 230-239.

Rouhani M. and Sappa A., “Relaxing the 3L Algorithm for an Accurate Implicit Polynomial Fitting”, IEEE Int. Conf. on Computer Vision and Pattern Recognition, San Francisco, CA, USA, June 13-18, 2010, pp. 3066-3072.

Sappa A. and Rouhani M., “Efficient Distance Estimation for Fitting Implicit Quadric Surfaces”, IEEE Int. Conf. on Image Processing, Cairo, Egypt, November 7-11, 2009, pp. 3521-3524.

Rouhani M. and Sappa A., “A Novel Approach to Geometric Fitting of Implicit Quadrics”, Int. Conf. on Advanced Concepts for Intelligent Vision Systems, LNCS Vol. 5807, Springer Verlag, Bordeaux, France, September 2009, pp. 121-132.

Julià C., Sappa A., Lumbreras F., Serrat J. and López A., “Photometric Stereo through an Adapted Alternation Approach”, IEEE Int. Conf. on Image Processing, San Diego, California, USA, October 12-15, 2008, pp. 1500-1503.

Julià C., Sappa A., Lumbreras F., Serrat J. and López A., “An Adapted Alternation Approach for Recommender Systems”, IEEE Int. Conf. on e-Business Engineering, Xi'an, China, October 22-24, 2008, pp. 128-135.

Sappa A., Dornaika F., Gerónimo D. and López A., “Registration-based moving object detection from a moving camera”, IROS2008 2nd Workshop on Perception, Planning and Navigation for Intelligent Vehicles, Nice, France, September 26, 2008, pp. 65-69.

Julià C., Sappa A., Lumbreras F., Serrat J. and López A., “Recovery of Surface Normals and Reflectance from Different Lighting Conditions”, Int. Conf. on Image Analysis and Recognition, LNCS Vol. 5112, Springer Verlag, Póvoa de Varzim, Portugal, June 25-27, 2008, pp. 315-325.

Dornaika F. and Sappa A., “Real Time On Board Stereo Camera Pose through Image Registration”, IEEE Intelligent Vehicles Symposium, Eindhoven, Netherlands, June 4-6, 2008, pp 804-809.

Dornaika F. and Sappa A., “Real-time Vehicle Ego-Motion using Stereo Pairs and Particle Filters”, Int. Conf. on Image Analysis and Recognition, LNCS Vol. 4633, Springer Verlag, Montreal, Canada, August 2007, pp 469-480.

Sappa A., Dornaika F., Gerónimo D. and López A., “Efficient On-Board Stereo Vision Pose Estimation”, Computer Aided Systems Theory, LNCS Vol. 4739, Springer Verlag, November 2007, pp. 1183-1190 (selected paper from EUROCAST2007).

Sappa A., Herrero R., Dornaika F., Gerónimo D. and López A., “Road Approximation in Euclidean and v-Disparity Space: A Comparative Study”, Computer Aided Systems Theory, LNCS Vol. 4739, Springer Verlag, November 2007, pp. 1105-1112 (selected paper from EUROCAST2007).

Julià C., Sappa A., Lumbreras F., Serrat J. and López A., “Motion Segmentation from Feature Trajectories with Missing Data”, 3rd. Iberian Conference on Pattern Recognition and Image Analysis, LNCS Vol. 4477, Springer Verlag, Girona, Spain, June 2007, pp. 483-490.

Gerónimo D., López A. and Sappa A., “Computer Vision Approaches to Pedestrian Detection: Visible Spectrum Survey”, 3rd. Iberian Conference on Pattern Recognition and Image Analysis, LNCS Vol. 4477, Springer Verlag, Girona, Spain, June 2007, pp. 547-554.

Gerónimo D., López A., Ponsa D. and Sappa A., “Haar Wavelets and Edge Orientation Histograms for On-board Pedestrian Detection”, 3rd. Iberian Conference on Pattern Recognition and Image Analysis, LNCS Vol. 4477, Springer Verlag, Girona, Spain, June 2007, pp. 418-425.

Berti H., Sappa A. and Agamennoni O., “Autonomous Robot Navigation with a Global and Asymptotic Convergence”, IEEE Int. Conf. on Robotics and Automation, Roma, Italy, April 2007, pp. 2712-2717.

Gerónimo D., Sappa A., López A. and Ponsa D., “Adaptive Image Sampling and Windows Classification for On-board Pedestrian Detection”, Int. Conf. on Computer Vision Systems, Bielefeld, Germany, March 2007. (Open Access).

Sappa A., Dornaika F., Gerónimo D. and López A., “Efficient On-Board Stereo Vision Pose Estimation”, EUROCAST2007, Workshop on Cybercars and Intelligent Vehicles, Las Palmas de Gran Canaria, Spain, February, 2007, pp. 406-409.

Sappa A., Herrero R., Dornaika F., Gerónimo D. and López A., “Road Approximation in Euclidean and v-Disparity Space: A Comparative Study”, EUROCAST2007, Workshop on Cybercars and Intelligent Vehicles, Las Palmas de Gran Canaria, Spain, February, 2007, pp. 368-369.

Sappa A., and Vintimilla B., “Edge Point Linking by Means of Global and Local Schemes”, IEEE Int. Conf. on Signal-Image Technology and Internet-Based Systems, Hammamet, Tunisia, December 2006, pp. 551-560.

Dornaika F. and Sappa A., “3D Face Tracking using Appearance Registration and Robust Iterative Closest Point Algorithm”, 21st International Symposium on Computer and Information Sciences, LNCS Vol. 4263, Springer Verlag, Istanbul, Turkey, November 2006, pp. 532-541.

Dornaika F. and Sappa A., “Rigid and Non-Rigid Face Motion Tracking by Aligning Texture Maps and Stereo-Based 3D Models”, Int. Conf. on Advanced Concepts for Intelligent Vision Systems, LNCS Vol. 4179, Springer Verlag, Antwerp, Belgium, September 2006, pp. 675-684.

Julià C., Sappa A., Lumbreras F., Serrat J. and López A., “An Iterative Multiresolution Scheme for SFM”, Int. Conf. on Image Analysis and Recognition, LNCS Vol. 4141, Springer Verlag, Póvoa de Varzim, Portugal, September 18-20, 2006, pp. 804-815.

Sappa A., Gerónimo D., Dornaika F. and López A., “Real Time Vehicle Pose Using On-Board Stereo Vision System”, Int. Conf. on Image Analysis and Recognition, LNCS Vol. 4142, Springer Verlag, Póvoa de Varzim, Portugal, September 18-20, 2006, pp. 205-216.(Nominated for a Book Chapter in "Scene Reconstruction, Pose Estimation and Tracking" )

Gerónimo D., Sappa A., López A. and Ponsa D., “Pedestrian Detection using Adaboost Learning of Features and Vehicle Pitch Estimation”, Int. Conf. on Visualization, Imaging, and Image Processing, Palma de Mallorca, Spain, August 2006.

Dornaika F. and Sappa A., “3D Motion from Image Derivatives using the Least Trimmed Square Regression”, Int. Workshop on Intelligent Computing in Pattern Analysis/Synthesis, LNCS Vol. 4153, Springer Verlag, Xi'an, China, August 2006, pp. 76-84.

Sappa A. and Dornaika F., “An Edge-Based Approach to Motion Detection”, Int. Conf. on Computational Science, LNCS Vol. 3991, Springer Verlag, Reading, United Kingdom, May 28-31, 2006, pp. 563-570.

Julià C., Sappa A., Lumbreras F., Serrat J. and López A., “Factorization with Missing and Noisy Data”, Int. Conf. on Computational Science, LNCS Vol. 3991, Springer Verlag, Reading, United Kingdom, May 28-31, 2006, pp. 555-562.

Dornaika F. and Sappa A., “Improving Appearance-Based 3D Face Tracking Using Sparse Stereo Data”, Int. Conf. on Computer Vision Theory and Applications, Setúbal, Portugal, February 2006, pp. 310-317.

Dornaika F. and Sappa A., “Appearance-based 3D Face Tracker: An Evaluation Study”, IEEE Int. Workshop on Visual Surveillance and Performance Evaluation of Tracking and Surveillance, Beijing, China, October 2005, pp. 121-128.

Dornaika F. and Sappa A., “SFM for Planar Scenes: a Direct and Robust Approach”, Int. Conf. on Informatics in Control, Automation and Robotics, Barcelona, Spain, September 2005, pp. 175-180.

Sappa A., “Efficient Closed Contour Extraction from Range Image's Edge Points”, IEEE Int. Conf. on Robotics and Automation, Barcelona, Spain, April 2005, pp. 4344-4349.

Sappa A., Aifanti N.,Malassiotis S. and Strintzis M. G., “3D Gait Estimation from Monoscopic Video”, IEEE International Conference on Image Processing, Singapore, October 2004, pp.1963-1966.

Sappa A., Aifanti N., Malassiotis S. and Strintzis M. G., “3D Human Walking Modeling”, Third Int. Workshop on Articulated Motion and Deformable Objects, LNCS Vol. 3179, Springer Verlag, Springer Verlag, Palma de Mallorca, Spain, September 2004, pp. 111-122.

Sappa A.., “Automatic Extraction of Planar Projections from Panoramic Range Images”, IEEE Int. Symp. on 3D Data Processing, Visualization & Transmission, Thessaloniki, Greece, September 2004.

Sappa A., “Surface Model Generation from Range Images of Industrial Environments”, IEEE Int. Symp. on 3D Data Processing, Visualization & Transmission, Thessaloniki, Greece, September 2004.

Sappa A., Aifanti N., Malassiotis S. and Strintzis M. G., “Unsupervised Motion Classification by means of Efficient Feature Selection and Tracking”, IEEE Int. Symp. on 3D Data Processing, Visualization & Transmission, Thessaloniki, Greece, September 2004.

Sappa A. and Garcia M. A., “Hierarchical Clustering of 3D Objects and its Application to Minimum Distance Computation”, IEEE Int. Conf. on Robotics and Automation, New Orleans, LA, USA, pp. 5287-5292, April-May 2004.

Sappa A., Aifanti N., Malassiotis S. and Strintzis M. G., “Monocular 3D Human Body Reconstruction Towards Depth Augmentation of Television Sequences”, IEEE International Conference on Image Processing, Barcelona, Spain, September 2003, pp. 325-328.

Restrepo-Spetch A., Devy M. and Sappa A., “Robustness to Initial Conditions in Registration of Range Images Using the ICP algorithm”, 3rd. Int. Symp. on Robotics and Automation, Toluca, Edo. de Mexico, Mexico, September 2002.

Sappa A., “Improving Segmentation Results by Studying Surface Continuity”, 16th Int. Conf. on Pattern Recognition, Quebec city, Canada, August 2002, pp. 929-932.

Devy M., Restrepo-Spetch A. and Sappa A., “Comparaison de Méthodes de Recalage de Données 3D par Construction d’un Maillage Triangulaire ou Extraction des Contours 3D”, 13ème Congrès Francophone AFRIF-AFIA de Reconnaissance des Formes et Intelligence Artificielle, Angers, France, January 2002 (in French).

Sappa A., Bevilacqua V. and Devy M., “Improving a Genetic Algorithm Segmentation by means of a Fast Edge Detection Technique”, IEEE Int. Conf. on Image Processing, Thessaloniki, Greece, October 2001, pp. 754-757.

Sappa A., Restrepo-Spetch A. and Devy M., “Range Image Registration by using an Edge-Based Representation”, 9th Int. Symp. on Intelligent Robotic Systems, Toulouse, France, July 2001.

Sappa A. and Devy M., “Efficient Contour Extraction in Range Image Segmentation for Building Modelling”, Int. Symp. on Virtual and Augmented Architecture, Dublin, Ireland, June 2001.

Sappa A., Devy M. and Restrepo-Spetch A., “Segmentation d’Images 3D par Extraction des Contours 3D”, ORASIS 2001, Congrès Francophone de Vision par Ordinateur, Cahors, France, June 2001 (in French).

Sappa A. and Devy M., “Fast Range Image Segmentation by an Edge Detection Strategy”, IEEE Third International Conference on 3D Digital Imaging and Modeling, Quebec, Canada, June 2001.

Sappa A. and Garcia L. M., "Towards Real-Time Image Segmentation using Polynomial Functions", XIII Brazilian Symposium on Computer Graphics and Image Processing, Gramado, Brazil, October 2000, pp. 335.

Sappa A., Devy M. and Garcia M. A., “Modeling Built Environments from Large Range Images”, 8th Int. Symp. on Intelligent Robotic Systems, pp. 23-29, Reading, UK, July 2000.

Bozier J., Devy M. and Sappa A., “A Geometrical Approach for the Incremental Modelling of Free Form Surface by Triangular Meshes”, 8th Int. Symp. on Intelligent Robotic Systems, pp. 13-21, Reading, UK, July 2000.

Sappa A., Garcia M. A. and Vintimilla B., “Geometric and Topological Lossy Compression of Dense Range Images”, IEEE Int. Conf. on Image Processing, Vancouver, Canada, September 2000, pp.423-426.

Sappa A. and Garcia M. A., “Modeling Range Images with Bounded Error Triangular Meshes without Optimization”, 15th Int. Conf. on Pattern Recognition, Barcelona, Spain, September 2000, pp. 392-395.

Sappa A. and Garcia M. A., “Incremental Multiview Integration of Range Images”, 15th Int. Conf. on Pattern Recognition, Barcelona, Spain, September 2000, pp. 546-549.

Garcia M. A., Vintimilla B. and Sappa A., “Approximation and Processing of Intensity Images with Discontinuity-Preserving Adaptive Triangular Meshes”, Sixth European Conference on Computer Vision, LNCS Vol. 1842, Springer Verlag, Dublin, Ireland, July 2000, pp. 844-855.

Garcia M. A., Vintimilla B. and Sappa A., “Efficient Approximation of Gray-Scale Images Through Bounded Error Triangular Meshes”, IEEE Int. Conf. on Image Processing, Kobe, Japan, October 1999, pp. 168-171.

Garcia M. A., Vintimilla B. and Sappa A., “Approximation of Intensity Images with Adaptive Triangular Meshes: Towards a Processable Compressed Representation”, Irish Machine Vision and Image Processing Conference, Dublin, Ireland, September 1999.

Garcia M. A., Sappa A. and Basañez L., “Efficient Generation of Object Hierarchies from 3D Scenes”, IEEE Int. Conf. on Robotics and Automation, Detroit, USA, pp. 1359-1364, May 1999.

Garcia M. A., Velázquez S. and Sappa A., “A Two-Stage Algorithm for Planning the Next View from Range Images”, 9th British Machine Vision Conference, Southampton, UK, pp. 720-729, September 1998.

Garcia M. A., Velázquez S., Sappa A. and Basañez L., “Autonomous Sensor Planning for 3D Reconstruction of Complex Objects from Range Images”, IEEE Int. Conf. on Robotics and Automation, Leuven, Belgium, pp. 3085-3090, May 1998.

Garcia M. A., Sappa A. and Basañez L., “Efficient Approximation of Range Images Through Data Dependent Adaptive Triangulations”, IEEE Int. Conf. on Computer Vision and Pattern Recognition, San Juan, Puerto Rico, pp. 628-633, June 1997.

Garcia M. A., Sappa A. and Basañez L., “Fast Generation of Adaptive Quadrilateral Meshes from Range Images”, IEEE Int. Conf. on Robotics and Automation, Albuquerque, USA, pp. 2813-2818, April 1997.

(cc) Angel D. Sappa 2003-2023 (Last update February 2023).
All materials can be used under Creative Commons Licence Attribution-Noncommercial 3.0.