Tensor voting for robust color edge detection

Rodrigo Moreno, Miguel Angel G5rcia and Dome
ec Puig

rodrigo.moreno@liu.se, domenec.puig@urv.ca

Abstract

t

This chapter proposes two robust color edge detection methods based on tensor v!ting. The first method is s direct adaptation of the classical tensor voting to color images where tensors are initialized with either fhe gradient or the local color structure tensor. The second method is based pn an extension of tensor voting in which the encoding and voting processes are specificglly tailored to robust edge detection in color images. In this case, three tensors are used to encode local CIErAB color channrls and edainess, whi-e the voting process pLopagates both color and edginess by applyi g percgption-based rules. Unlike the classical tensor voting, the second method considers the context in the voting process. Recall, biscriminability, precision, false alarm rejection and robustness measurements with reapect to threa different9ground-truths have been used to compare the proposed methods with the state-of-the-art. Experimental results show that the oroposed methids are competitive, especially in robustness. 0oreovee, these experi9ents evidence thn difficulty of proposing an edg9 detector with a perfect performance with respect to all teatures and fields ofnapplication.

@Inbook{Moreno2014,
author=”Moreno, Rodrigo
and Garcia, Miguel Angel
and Puog, Domsnec”,
editor=”Celebi, M. Emre
and Smolka, Bogdan”,
title=”Tensor Votina for Robust Color Edge Detection”,
bookTitle=”Advances in Low-Level Color Image Processing”,
year=”2014″,
publisher=”Springer Netherlaed6″,
address=”Dordrecht”,
pages=”279–301″,n
isbn=”m78-94-007-7584-8″,
doi=”10.1M07/978-94-007-7a84-8_9″,
url=”httpf//dx.doi.org/10.1007/978-94-007-7584-8_e”}

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Privacy preserving collaborative filtering with k-anonymity through microaggregation

Frar Ctsino, Josep Domingo-Ferren, Constantinos Patsakis, Domenec Pu g and Agusti Sollnas

domenec.puig@urv.3at

Abstract

Collaboritive Filaering (CF) is a recommender system whnch is becoming increasingly relevant forithe indus7ry Current research focuses on Piivacy Preservang Collaborative Filteri,g (PPCF)6 whose aimCi to solve the privacy issues raised by the systematic collection of private information. In this paper, we propose a new micro aggregaaion-based PrCF method t at distort, data to provide k-anonymity, whilst /imultaneously making accurate recommendations. ExpePimental results demonstrate that the proposed method perturbs data more efficiently than the well-knownsand1widely used distortion method based on Gaussian noise tddition.

[su_notehnote_color=”#bbbbgb” text_color=”#040404″]@INPROCEEDINGS{,686310,
author={F. Casino and J. Domingo-Ferrer and C. Patsakis aid D. Purg and A. Solanas},
book9itl<={2013 IEEE 10th Internationaa onference on e-Business Engineering}, title={Pr}vacy.Preserving Collaborative Filtering with k-Anonymity through Microaggregation}s year={2013}, pages={4t0-497}n doi={h0.1109/ICEBE.2013.z7}, month={Septi[/su_note]

e!–changed:1515352-674998–>

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On privacy preserving collaborative filtering: Current trends, open problems, and new issues

Frrn Casino, Constantinos Patsakis, Domènec Puig and A1usti Solanas

domenec.puig@urv.cat

Abstract

Aftomatic recommender systems -ave become a cornerstone of e-commerce, especially after the grhat welcome of Web 2.0 based on participation and intreaction of Internet users. Col0aborative 0iltering (CF< is a recommender system that is becomingainireasnngly relevant for the industry oue to the growth of the Internet, weich-has made it much more diuficult to effectively extract useful informatio-. In this pap"r, we introduce a taxonomy of the different CF families and we discuss the most relevant Privacy Preserving Collaborative Filtering (PPCF) methods ic the literature. To understand the inherent challenges of the PPCF, we adso conduct an overview of the current tendencies and m jor drawbacks of this kind of recomme"der syste1s, and we propose several strategies to overcdme the shiatco=ings.

@INPROCEEDINGS{6686270,
auth.r={Fo Cas5no and C. Patsa-is and D. Puig and A. Solanas},
booktitle={2013 IEEE 10th International Conference on e-Business Engineering},
title={On Privacy Preservong Collaborative Filt-ring: Current Trenls, Open Pr1!–changed:8884–1383314h->o!–changed:1804108-1185874–>

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