Información del autor
Autor Gómez, Daniel |
Documentos disponibles escritos por este autor (43)
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An important topic in using maps derived from a statistical classifier is the accuracy assessment of the classification. Analysts usually need to compare various techniques, algorithms, or different approaches. As pointed out by Stehman and Czap[...]texto impreso
The SPERT problem was defined, in a game theory framework, as the fair allocation of the slack or float among the activities in a PERT network previous to the execution of the project. Previous approaches tackle with this problem imposing that t[...]texto impreso
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In this paper we show that Atanassov's Intuitionistic Fuzzy sets can be viewed as a classification model, that can be generalized in order to take into account more classes than the three classes considered by Atanassov's (membership, non-member[...]texto impreso
Villarino, Guillermo ; Gómez, Daniel ; Rodríguez, Juan Tinguaro ; Montero, Javier | Springer-Verlag | 2018Most supervised classification algorithms produce a soft score (either a probability, a fuzzy degree, a possibility, a cost, etc.) assessing the strength of the association between items and classes. After that, each item is assigned to the clas[...]texto impreso
Gómez, Daniel ; González-Arangüena, Enrique ; Conrado, Manuel ; Owen, Guillermo ; Pozo Juan, Mónica del ; Tejada Cazorla, Juan Antonio | Elsevier | 2003-08A new family of centrality measures, based on game theoretical concepts, is proposed for social networks. To reflect the interests that motivate the interactions among individuals in a network, a cooperative game in characteristic function form [...]texto impreso
Consistencia y estabilidad en operadores de agregación: Una aplicación al problema de datos perdidos
Gómez, Daniel ; Rojas, Karina ; Montero, Javier ; Rodríguez, Juan Tinguaro ; Beliakov, G. | Universidad de Zaragoza | 2014En este trabajo se analiza una cuestión clave respecto de la relación que debe existir entre operadores de una misma familia de operadores de agregación (FAO) {An}, a fin de comprender que ellos deben definir adecuadamente un todo consistente. S[...]texto impreso
Gómez, Daniel ; Rojas Patuelli, Karina ; Montero, Javier ; Rodríguez, Juan Tinguaro | Springer-Verlag Berlin Heidelberg | 2013In this work we analyze the key issue of the relationship that should hold between the operators in a family {An} of aggregation operators in order to understand they properly define a consistent whole. Here we extend some of the ideas about sta[...]texto impreso
In this work, we continue with a previous work in which we analyzed and defined notions of consistency, stability and continuity of a family of aggregation operators (FAO) when the data is unstructured. Here we use these concepts to tackle with [...]texto impreso
A large number of accuracy measures for crisp supervised classification have been developed in supervised image classification literature. Overall accuracy, Kappa index, Kappa location, Kappa histo and user accuracy are some well-known examples.[...]texto impreso
A large number of accuracy measures for image classification are actually available in the literature for cris classification. Overall accuracy, producer accuracy, user accuracy, kappa index and tau value are some examples. But in contrast to th[...]texto impreso
Rojas, Karina ; Gómez, Daniel ; Montero, Javier ; Rodríguez, Juan Tinguaro ; Valdivia, Andrea ; Paiva, Francisco | Elsevier | 2014-04-16The interventions aimed at the early childhood are of a main interest in educational policy, since it is in this period when it is possible to produce a major impact in the subsequent human development. The quality of children's social environme[...]texto impreso
In this paper we present a divisive hierarchical method for the analysis and segmentation of visual images. The proposed method is based on the use of the k-means method embedded in a recursive algorithm to obtain a clustering at each node of th[...]texto impreso
One of the main challenges of fuzzy community detection problems is to be able to measure the quality of a fuzzy partition. In this paper, we present an alternative way of measure the quality of a fuzzy community detection output based on n-dime[...]texto impreso
Guada, Carely ; Gómez, Daniel ; Rodríguez, Juan Tinguaro ; Yáñez, Javier ; Montero, Javier | Atlantis Press | 2015In this paper, we present a way to define the concept of fuzzy image segmentation, which has not been clearly defined in the literature. In this work the term Fuzzy image segmentation is characterized by means of a fuzzy set over the set of edge[...]texto impreso
Supervised classification in remote sensing is a very complex problem and involves steps of different nature, including a serious data preprocessing. The final objective can be stated in terms of a classification of isolated pixels between class[...]texto impreso
In this paper we extend the notion of stability of each aggregation function as presented in a previous paper of the authors, where an aggregation function was denominated Family of Aggregation Operators (FAO) in order to stress that aggregation[...]texto impreso
Segmentation algorithms are well known in the field of image processing. In this work we propose an efficient and polynomial algorithm for image segmentation based on fuzzy set theory. The main difference with the classical segmentation algorith[...]texto impreso
In this chapter we consider remotely sensed images, where land surface should be classified depending on their uses. On one hand, we discuss the advantages of the fuzzy classification model proposed by Amo et al. (European Journal of Operational[...]texto impreso
Castro, Javier ; Gómez, Daniel ; Molina, Elienda ; Tejada Cazorla, Juan Antonio | Pergamon-Elsevier | 2017In this paper, we propose a refinement of the polynomial method based on sampling theory proposed by Castro et al. (2009) to estimate the Shapley value for cooperative games. In addition to analyzing the variance of the previously proposed estim[...]texto impreso
Gómez, Daniel ; Montero, Javier ; Yáñez, Javier | European Society for Fuzzy Logic and Technology | 2006Measuring criteria weights in multicriteria decision making is a key issue in order to amalgamate information when reality is being described from several different points of view. In this paper we propose a method for evaluating those weights t[...]texto impreso
En esta comunicacion, se consideran imágenes tomadas mediante teledeteccion, y se propone un modelo de clasificación no supervisado para obtener una clasificación difusa. Nuestro procedimiento busca en primer lugar regiones homogeneas,analizando[...]texto impreso
Gómez, Daniel ; Rodríguez, Juan Tinguaro ; Montero, Javier ; Bustince, H. ; Barrenechea, E. | Elsevier | 2014In this paper we introduce the definition of n-dimensional overlap functions and we justify the axiomatization proposed in its definition. Basically, these functions allow to measure the degree of overlapping of several classes in a given classi[...]texto impreso
Montero, Javier ; Rodríguez, Juan Tinguaro ; Franco, Camilo ; Bustince, Humberto ; Barrenechea, Edurne ; Gómez, Daniel | Springer | 2014In this paper, we want to stress that bipolar knowledge representation naturally allows a family of middle states which define as a consequence different kinds of bipolar structures. These bipolar structures are deeply related to the three types[...]texto impreso
Flores-Vidal, Pablo A. ; Olaso, Pablo ; Gómez, Daniel ; Guada, Carely | 2019-03Traditionally, the edge detection process requires one final step that is known as scaling. This is done to decide, pixel by pixel, if these will be selected as final edge or not. This can be considered as a local evaluation method that presents[...]