Papers by Ebroul Izquierdo
2001 IEEE International Conference on Acoustics, Speech, and Signal Processing. Proceedings (Cat. No.01CH37221), 2001
2007 IEEE International Conference on Image Processing, 2007
Studies in Computational Intelligence, 2011
... of scalability. In temporal scalability mode, the scalable encoded bitstream can be Page 4. 5... more ... of scalability. In temporal scalability mode, the scalable encoded bitstream can be Page 4. 550 N. Ramzan and E. Izquierdo extracted to one half of the frame rate, eg from 50 fps (frames per second) to 25 fps. Similarly in spatial ...
Lecture Notes in Computer Science, 2011
High quality multimedia contents can distribute in a flexible, efficient and personalized way thr... more High quality multimedia contents can distribute in a flexible, efficient and personalized way through dynamic and heterogeneous environments in Future Internet. Scalable Video Coding (SVC) and Multiple Description Coding (MDC) fulfill these objective thorough P2P distribution techniques. This chapter discusses the SVC and MDC techniques along with the real experience of the authors of SVC/MDC over P2P networks and emphasizes
2009 16th International Conference on Digital Signal Processing, 2009
Tags pose an efficient and effective way of organization of resources, but they are not always av... more Tags pose an efficient and effective way of organization of resources, but they are not always available. A technique called SCM/THD investigated in this paper extracts entities from free-text annotations, and using the Lin similarity measure over the WordNet thesaurus classifies them into a controlled vocabulary of tags. Hypernyms extracted from Wikipedia are used to map uncommon entities to Wordnet
Lecture Notes in Computer Science, 2014
2014 IEEE International Conference on Image Processing (ICIP), 2014
ABSTRACT In this paper the scanline optimization used for stereo matching, is revisited. In order... more ABSTRACT In this paper the scanline optimization used for stereo matching, is revisited. In order to improve the performance of this semi-global technique, a new criterion to check depth discontinuity, is introduced. This criterion is defined according to the mean-shift-based image segmentation result. Additionally, this work proposes the employment of a pixel dissimilarity metric for the computation of the cost term, which is then provided to the guided image filter approach to estimate the initial cost volume. The algorithm is tested on the four images of the online Middlebury stereo evaluation benchmark. Moreover, it is tested on 27 additional Middlebury stereo pairs for assessing thoroughly its performance. The extended comparison verifies the efficiency of this work.
Image and Vision Computing, 2015
Proceedings of the 9th International Workshop on Multimedia Data Mining held in conjunction with the ACM SIGKDD 2008 - MDM '08, 2008
2012 13th International Workshop on Image Analysis for Multimedia Interactive Services, 2012
The future of tele-conferencing is towards multi-party 3D Tele-Immersion (TI) and TI environments... more The future of tele-conferencing is towards multi-party 3D Tele-Immersion (TI) and TI environments that can support realistic inter-personal communications and virtual interaction among participants. In this paper, we address two important issues, pertinent to TI environments. The paper focuses on techniques for the real-time, 3D reconstruction of moving humans from multiple Kinect devices. The off-line generation of real-life 3D scenes
International Journal of Pattern Recognition and Artificial Intelligence, 2006
Digital Media Processing for Multimedia Interactive Services - Proceedings of the 4th European Workshop on Image Analysis for Multimedia Interactive Services, 2003
ABSTRACT
Proceedings. 2nd International Symposium on 3D Data Processing, Visualization and Transmission, 2004. 3DPVT 2004., 2004
A median correlation for the estimation of corresponding points in stereovision is proposed. It i... more A median correlation for the estimation of corresponding points in stereovision is proposed. It is based on the normalised correlation coefficient using the median instead of the mean. Its performance appears to be superior than conventional correlation specially in depth discontinuities image areas. This conclusion is derived from an empirical evaluation in which the proposed correlation is compared with the
47th International Symposium ELMAR, 2005., 2005
... ACKNOWLEDGEMENT Maria Trujillo, assistant professor at University of Valle, Cali-Colombia, ac... more ... ACKNOWLEDGEMENT Maria Trujillo, assistant professor at University of Valle, Cali-Colombia, acknowledges the financial support provided by the University of Valle to ... John Wiley and Sons, New York, 1973 [5] Ester, M., Kriegel, HP, Sander, J. and Xu, X. "A density-based ...
Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering, 2012
Proceedings Third IEEE International Conference on Automatic Face and Gesture Recognition, 1998
2014 IEEE International Conference on Image Processing (ICIP), 2014
Proceedings of the First International Workshop on Gamification for Information Retrieval - GamifIR '14, 2014
ABSTRACT We present a semi-supervised approach to recognize faces or people while incorporating c... more ABSTRACT We present a semi-supervised approach to recognize faces or people while incorporating crowd-sourced and gamified feedback to iteratively improve recognition accuracy. Unlike traditional approaches which are often limited to explicit feedback, we model ambiguous feedback information that we implicitly gather through a crowd that plays a game. We devise a graph-based recognition approach that incorporates such ambiguous feedback to jointly recognize people across an entire dataset. Multiple experiments demonstrate the effectiveness of our gamified feedback approach.
2014 IEEE International Conference on Image Processing (ICIP), 2014
IEEE Transactions on Circuits and Systems for Video Technology, 2015
ABSTRACT Most of the advances in video coding technology focus on applications that require low b... more ABSTRACT Most of the advances in video coding technology focus on applications that require low bitrates, for example, for content distribution on a mass scale. For these applications, the performance of conventional coding methods is typically sufficient. Such schemes inevitably introduce large losses to the signal, which are unacceptable for numerous other professional applications such as capture, production, and archiving. To boost the performance of video codecs for high-quality content, better techniques are needed especially in the context of the prediction module. An analysis of conventional intra prediction methods used in the state-of-the-art High Efficiency Video Coding (HEVC) standard is reported in this paper, in terms of the prediction performance of such methods in the frequency domain. Appropriately modified encoder and decoder schemes are presented and used for this paper. The analysis shows that conventional intra prediction methods can be improved, especially for high frequency components of the signal which are typically difficult to predict. A novel approach to improve the efficiency of high-quality video coding is also presented in this paper based on such analysis. The modified encoder scheme allows for an additional stage of processing performed on the transformed prediction to replace selected frequency components of the signal with specifically defined synthetic content. The content is introduced in the signal using feature-dependent lookup tables. The approach is shown to achieve consistent gains against conventional HEVC with up to −5.2% coding gains in terms of bitrate savings.
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Papers by Ebroul Izquierdo