Search Results for author: Luciano da F. Costa

Found 25 papers, 1 papers with code

Two Approaches to Supervised Image Segmentation

no code implementations19 Jul 2023 Alexandre Benatti, Luciano da F. Costa

While the deep learning approach confirmed its potential for performing image segmentation, the alternative multiset methodology allowed for enhanced accuracy while requiring little computational resources.

Dimensionality Reduction Image Segmentation +2

Using Full-Text Content to Characterize and Identify Best Seller Books

no code implementations5 Oct 2022 Giovana D. da Silva, Filipi N. Silva, Henrique F. de Arruda, Bárbara C. e Souza, Luciano da F. Costa, Diego R. Amancio

Such an outcome suggests that it is unfeasible to predict the success of books with high accuracy using only the full content of the texts.

Neuromorphic Networks as Revealed by Features Similarity

no code implementations13 Jun 2022 Alexandre Benatti, Henrique F. de Arruda, Luciano da F. Costa

Well-separated groups were obtained that provide a rich representation of the main similarity interrelationships between the 735 considered neuronal cells.

Enzyme Similarity Networks

no code implementations10 May 2022 Renan dos Reis, Luciano da F. Costa

In order to investigate the effect of the considered physicochemical features on the enzymes relationships, the coincidence-based method also is applied to create a meta-network, in which the enzymes similarity networks obtained by the combination of every possible feature becomes nodes of a feature combination network, and the coincidence similarity between those networks defines the respective links.

Text characterization based on recurrence networks

no code implementations17 Jan 2022 Bárbara C. e Souza, Filipi N. Silva, Henrique F. de Arruda, Giovana D. da Silva, Luciano da F. Costa, Diego R. Amancio

In particular, texts are also characterized by a hierarchical structure that can be approached by using multi-scale concepts and methods.

Text Classification

Multiset Signal Processing and Electronics

no code implementations13 Nov 2021 Luciano da F. Costa

Recent generalizations of multisets to real-valued functions, accounting for possibly negative values, have paved the way to a number of interesting implications and applications, including respective implementations as electronic systems.

Multiset Neurons

no code implementations13 Nov 2021 Luciano da F. Costa

After presenting the basic concepts related to real-valued multisets and the adopted similarity metrics, including the generalization of the real-valued Jaccard and coincidence indices to higher orders, we proceed to studying the response of a single neuron, not taking into account the output non-linearity (e. g.~sigmoid), respectively to the detection of gaussian two-dimensional stimulus in presence of displacement, magnification, intensity variation, noise and interference from additional patterns.

Image Segmentation Semantic Segmentation

Comparing Cross Correlation-Based Similarities

no code implementations8 Nov 2021 Luciano da F. Costa

The multiset-based correlation methods, and especially the coincidence index, presented remarkable performance characterized by sharper and narrower peaks while secondary peaks were attenuated, which was maintained even in presence of intense levels of noise.

Template Matching

On Similarity

no code implementations2 Nov 2021 Luciano da F. Costa

The objective quantification of similarity between two mathematical structures constitutes a recurrent issue in science and technology.

Further Generalizations of the Jaccard Index

no code implementations18 Oct 2021 Luciano da F. Costa

The present work addresses further generalizations of this index, including its modification into a coincidence index capable of accounting also for the level of relative interiority between the two compared entities, as well as respective extensions for sets in continuous vector spaces, the generalization to multiset addition, densities and generic scalar fields, as well as a means to quantify the joint interdependence between two random variables.

An Ample Approach to Data and Modeling

no code implementations5 Oct 2021 Luciano da F. Costa

The situation in which the data needs to be represented in terms of respective probability densities is treated next, yielding the $M^{<\sigma>}$ meta model, which is then illustrated respectively to a real-world dataset (iris flowers data).

A pattern recognition approach for distinguishing between prose and poetry

no code implementations18 Jul 2021 Henrique F. de Arruda, Sandro M. Reia, Filipi N. Silva, Diego R. Amancio, Luciano da F. Costa

Interestingly, by using an approach based on complex networks to visualize the similarities between the different texts considered, we found that the patterns of poetry vary much more than prose.

Temporal Sequences

Revisiting Agglomerative Clustering

no code implementations16 May 2020 Eric K. Tokuda, Cesar H. Comin, Luciano da F. Costa

An important issue in clustering concerns the avoidance of false positives while searching for clusters.

Clustering

Toward Generalized Clustering through an One-Dimensional Approach

no code implementations1 Jan 2020 Luciano da F. Costa

After generalizing the concept of clusters to incorporate clusters that are linked to other clusters through some relatively narrow bridges, an approach for detecting patches of separation between these clusters is developed based on an agglomerative clustering, more specifically the single-linkage, applied to one-dimensional slices obtained from respective feature spaces.

Clustering feature selection

How Coupled are Mass Spectrometry and Capillary Electrophoresis?

no code implementations18 Oct 2019 Caroline Ceribeli, Henrique F. de Arruda, Luciano da F. Costa

In order to better understand the organization of the citation network, we considered a multi-scale analysis, in which we used the information regarding sub-clusters.

Malleability of complex networks

1 code implementation22 Oct 2018 Filipi N. Silva, Cesar H. Comin, Luciano da F. Costa

In this work, we suggest the concept of malleability of a network, which is defined as the exponential of the entropy of the probabilities of each possible unfolding with respect to a given configuration.

Physics and Society Social and Information Networks

Pattern Recognition Approach to Violin Shapes of MIMO database

no code implementations8 Aug 2018 Thomas Peron, Francisco A. Rodrigues, Luciano da F. Costa

Since the landmarks established by the Cremonese school in the 16th century, the history of violin design has been marked by experimentation.

Paragraph-based complex networks: application to document classification and authenticity verification

no code implementations22 Jun 2018 Henrique F. de Arruda, Vanessa Q. Marinho, Luciano da F. Costa, Diego R. Amancio

With the increasing number of texts made available on the Internet, many applications have relied on text mining tools to tackle a diversity of problems.

Document Classification General Classification +3

An Image Analysis Approach to the Calligraphy of Books

no code implementations24 Aug 2017 Henrique F. de Arruda, Vanessa Q. Marinho, Thales S. Lima, Diego R. Amancio, Luciano da F. Costa

Text network analysis has received increasing attention as a consequence of its wide range of applications.

Authorship Attribution

Representation of texts as complex networks: a mesoscopic approach

no code implementations30 Jun 2016 Henrique F. de Arruda, Filipi N. Silva, Vanessa Q. Marinho, Diego R. Amancio, Luciano da F. Costa

In order to grasp the mesoscopic characteristics of semantical content in written texts, we devised a network model which is able to analyze documents in a multi-scale fashion.

Complex systems: features, similarity and connectivity

no code implementations17 Jun 2016 Cesar H. Comin, Thomas K. DM. Peron, Filipi N. Silva, Diego R. Amancio, Francisco A. Rodrigues, Luciano da F. Costa

More specifically, the identification of the main areas to which the concepts frequently used in complex networks can be applied paves the way to adopting and applying a larger set of concepts and methods deriving from those respective areas.

Sociology Time Series Analysis

Topic segmentation via community detection in complex networks

no code implementations4 Dec 2015 Henrique F. de Arruda, Luciano da F. Costa, Diego R. Amancio

Many real systems have been modelled in terms of network concepts, and written texts are a particular example of information networks.

Community Detection

Classifying informative and imaginative prose using complex networks

no code implementations28 Jul 2015 Henrique F. de Arruda, Luciano da F. Costa, Diego R. Amancio

In the latter, many approaches have emphasized the semantical content of texts, as it is the case of bag-of-word language models.

Document Classification General Classification +2

Concentric network symmetry grasps authors' styles in word adjacency networks

no code implementations9 Apr 2015 Diego R. Amancio, Filipi N. Silva, Luciano da F. Costa

A statistical analysis of the symmetry distribution performed in several novels showed that most of the words do not display symmetric patterns of connectivity.

Authorship Attribution Information Retrieval +1

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