Alexandre Fieno Silva

Alexandre Fieno Silva
Instituto Federal de Educação, Ciência e Tecnologia do Sul de Minas Gerais | IFSULDEMINAS · Computer Science

PhD

About

22
Publications
25,666
Reads
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57
Citations
Introduction
PhD at the University of Brasilia in Informatic and, with a rapid passage through Delft, Netherlands in the Delft University of Technology, by government brazilian program, named, "Ciência sem Fronteiras". I have projects in ​​Digital Image and Video Processing, acting on the following topics: Human Face Recognition, Fingerprint Authentication, Educational Software, Computer Graphic, Video Transmission, Visual Attention, sustentable energy and in educational software focusing to special children
Additional affiliations
January 2018 - present
Instituto Federal de Educação, Ciência e Tecnologia do Sul de Minas Gerais
Position
  • Professor
Description
  • Professor Disciplines: Database, Algorithms and Introduction of Computing, Course coordinator, Principal
January 2010 - December 2017
Instituto Federal de Educação, Ciência e Tecnologia do Triângulo Mineiro
Position
  • Professor
Description
  • Disciplines: Database, Algorithms and Introduction of Computing, Image Processing, Web Programming, Course coordinator
January 2005 - December 2011
Faculdade FINOM
Faculdade FINOM
Position
  • Professor
Description
  • Professor and coordinator of undergraduate course (Technologist in Analysis and Systems Development); Disciplines: Database, Web programming, Multimedia system, Algorithms, architecture and organization of computer
Education
July 2013 - January 2014
Delft University of Technology
Field of study
  • Video Quality
August 2011 - March 2017
University of Brasília
Field of study
  • Video Quality
January 2003 - August 2006
Universidade Federal de Uberlândia (UFU)
Field of study
  • Computer Sciente

Publications

Publications (22)
Conference Paper
Full-text available
A computer vision approach to classify garbage into recycling categories could be an efficient way to process waste. This project aims to take garbage waste images and classify them into four classes: glass, paper, metal and, plastic. We use a garbage image database that contains around 400 images for each class. The models used in the experiments...
Conference Paper
Full-text available
A computer vision approach to classify garbage into recycling categories could be an efficient way to process waste. This project aims to take garbage waste images and classify them into four classes: glass, paper, metal and, plastic. We use a garbage image database that contains around 400 images for each class. The models used in the experiments...
Article
Full-text available
Objective video quality metrics are designed to be as reliable as the subjective quality assessments on which they are calibrated and validated. However, existing standard methodologies for subjective video quality assessment provide low reliable results for some conditions. We investigate whether an extension of the quality ruler experimental meth...
Research Proposal
Full-text available
The project aims to capture and storage the energy released by the movement of people and cars in the IFSuldeMinas in Pouso Alegre from piezoelectric sensors.
Article
Full-text available
In this paper, we report the results of a set of psychophysical experiments that measure the perceptual strengths of videos with different combinations of blockiness, blurriness, and packet-loss artifacts. Participants were instructed to search each video for impairments and rate the strength of their individual features (artifacts). A repeated mea...
Conference Paper
Full-text available
In this paper, we report the results of a set of psychophysical experiments that measure the perceptual strengths of videos with different combinations of blockiness, blurriness, and packet-loss artifacts and the overall annoyance. Participants were instructed to search each video for impairments and rate the strength of their individual features (...
Thesis
Full-text available
The main causes for the reducing of visual quality in digital imaging systems are the unwanted presence of degradation introduced during processing and transmission steps. However, measuring the quality of a video implies in a direct or indirect comparison between test video and reference video. In most applications, psycho-physical experiments wit...
Article
Full-text available
Understanding the perceptual impact of compression artifacts in video is one of the keys for designing better coding schemes and appropriate visual quality control chains. Although compression and transmission artifacts, such as blockiness, blurriness and packet-loss, appear simultaneously in digital videos, traditionally they have been studied in...
Conference Paper
Full-text available
In the last few years, there has been a growing interest in automatic methods (metrics) that blindly estimate the quality of digital videos, specially in applications where the videos are digitally transmitted over wired or wireless channels and the original (reference) video signal is not available at the receiver. Currently, there are few methods...
Research
Full-text available
In this paper, we evaluate the perceptual impact of three artifacts (i.e., blockiness, blurriness and packet-loss) on video quality. Based on data obtained from a pool of participants which evaluated videos impaired with packet-loss, blurriness and blockiness (in isolation and in combination), we analyze how the different artifacts combine to produ...
Conference Paper
Full-text available
In this paper, we propose a subjective video quality assessment method called video quality ruler (VQR) that can be employed to determine the perceived quality of video sequences. The described method is an extension of the ISO 20462, which is a method to assess image quality. The VQR method provides an interface with a set of pictures. The subject...
Conference Paper
Full-text available
In digital video systems, impairments introduced during the capture, coding/decoding processes, delivery and display might reduce the perceived quality of the visual content. Recent developments in the area of visual quality have focused on trying to incorporate aspects of gaze patterns into the design of visual quality metrics, mostly using the as...
Conference Paper
Full-text available
As the most of the waste generated on the big cities are recyclable, it is necessary to establish a selective collection manner for correctly classifying them. The different kinds of bins available for recycling may confuse a not well-disciplined user who do not know where (in which trash) should discard his waste. This paper proposes a novel syste...
Conference Paper
Full-text available
The application of computer games in education has evolved significantly in recent times, considering its appeal to the student and the capacity of higher concentration during its execution, resulting in a more consistent learning. The main objective of this project is to develop a game that applies Virtual Reality to the teaching of Computer Maint...
Conference Paper
Este artigo descreve a implementação de um sistema capaz de realizar agrupamento baseado em similaridade de coleções de documentos desorganizados. É apresentada a utilização da rede neural artificial SOM (Self Organizing Map) de Kohonen para realizar o agrupamento dos documentos gerando mapas representativos dos grupos encontrados. Os experimentos...
Conference Paper
A recuperação de falhas em sistemas de workflow é um assunto muito discutido no meio científico e um grande desafio. Existem muitos trabalhos relacionados, onde as abordagens do problema propõem soluções isoladas e desunificadas. Neste artigo temos como objetivo apresentar um estudo sobre recuperação de falhas em sistemas de gerenciamento de workfl...
Thesis
Full-text available
With the augment of criminal activities as bank robbery, kidnapping, etc., the needs of identifying a person in a safe manner became indispensable. Several algorithms have been proposed with the aim of resolving some of the challenges found in the retrieval systems as pose, illumination, age and facial expression effects. A very well diffused metho...
Conference Paper
Full-text available
O crescente desenvolvimento da pesquisa no reconhecimento de face humana tem tido uma forte influência em várias aplicações comerciais, aplicações em identificação criminal e em sistemas de segurança. Vários algoritmos foram propostos a fim de resolver alguns desafios encontrados no sistema de recuperação, como variações de pose, iluminação, difere...
Article
Full-text available
Resumo. Este trabalho tem como objetivo passar uma introdução sobre os sistemas de Marca D´Água Digital, quais as propriedades destes sistemas, onde estes sistemas são utilizados e com quais finalidades são aplicados, descrevemos também quais são os principais tipos de processamentos que são usados em dados marcados como forma de ataque. Fazemos um...

Questions

Question (1)
Question
I have a research to identify various recyclable garbage in an image obtained from the webcam, where our algorithm identifies the class, ie paper, plastic, metal and glass, from each garbage. Our next step is to identify more than one category of recyclable garbage simultaneously from the webcam. I would like to follow your project to see the evolutions and trends that you are proposing.

Network

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Projects

Projects (2)
Project
This study aims to understand the influence of a set of artifacts on the quality of video, their relationship with the content and to determine the their impact on visual quality perception. The set of artifacts used in this study was chosen among those most perceptually relevant for digital video applications (e.g. blockiness, blurriness, packet-loss etc). The data collected from this experiment is expected to help in the design a video quality objective metric which takes into account visual attention and the strength of specific spatial and temporal artifacts.
Project
Group of projects on innovation, energy collection, urban mobility and sustainability.