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Análise e avaliação de técnicas de interação humano-computador para sistemas de recuperação de imagens por conteúdo baseadas em estudo de caso; Evaluating human-computer interaction techniques for content-based image retrieval systems through a case study

Filardi, Ana Lúcia
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 30/08/2007 PT
Relevância na Pesquisa
95.84%
A recuperação de imagens baseada em conteúdo, amplamente conhecida como CBIR (do inglês Content-Based Image Retrieval), é um ramo da área da computação que vem crescendo muito nos últimos anos e vem contribuindo com novos desafios. Sistemas que utilizam tais técnicas propiciam o armazenamento e manipulação de grandes volumes de dados e imagens e processam operações de consultas de imagens a partir de características visuais extraídas automaticamente por meio de métodos computacionais. Esses sistemas devem prover uma interface de usuário visando uma interação fácil, natural e atraente entre o usuário e o sistema, permitindo que o usuário possa realizar suas tarefas com segurança, de modo eficiente, eficaz e com satisfação. Desse modo, o design da interface firma-se como um elemento fundamental para o sucesso de sistemas CBIR. Contudo, dentro desse contexto, a interface do usuário ainda é um elemento constituído de pouca pesquisa e desenvolvimento. Um dos obstáculos para eficácia de design desses sistemas consiste da necessidade em prover aos usuários uma interface de alta qualidade para permitir que o usuário possa consultar imagens similares a uma dada imagem de referência e visualizar os resultados. Para atingir esse objetivo...

Produção e avaliação de interfaces, segundo princípios da interação humano-computador; Production and evaluation of interfaces, according to the principles of Human-Computer Interaction

Matsukuma, Marcos
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 05/09/2012 PT
Relevância na Pesquisa
95.82%
Com a expansão do uso de ferramentas tecnológicas, principalmente representadas pelo computador, por seus programas e pelo acesso à Internet, percebe-se a sua presença cada vez maior em diferentes setores da sociedade, inclusive, no meio educacional. No entanto, por ainda ser uma novidade no ambiente tradicional de ensino, essas ferramentas podem ser utilizadas de modo descontextualizado, não favorecendo seu uso correto na aprendizagem. Portanto, é necessário que as políticas de acesso a esses recursos informáticos sejam bem coordenados para permitir que os usuários, principalmente professores e alunos, possam contar com uma infraestrutura que realmente possibilite o apoio ao ensino. Por outro lado, as interfaces interativas também devem ser desenvolvidas para que sejam utilizadas de modo adequado pelo seu público-alvo. Dessa forma, procurando contribuir para avaliação dos objetos de aprendizagem nos meios virtuais, essa pesquisa apresenta o estudo da construção de interfaces interativas centrada no usuário, apoiando-se em propostas originadas da Interação Humano-Computador (IHC). Assim, partindo do princípio de que o indivíduo é parte integrante e mais importante dos sistemas computacionais, o presente trabalho fez com que a investigação do uso das interfaces pelo usuário interferisse em seu próprio processo de produção. Para tanto...

Dialética da interação humano-computador: tratamento didático do diálogo midiatizado; Dialectics of human-computer interaction: didactic dialogue mediatized

Matos, Ecivaldo de Souza
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Tese de Doutorado Formato: application/pdf
Publicado em 22/03/2013 PT
Relevância na Pesquisa
95.91%
A Educação tem usufruído dos benefícios das tecnologias computacionais por meio da ampliação da experiência e do conhecimento humano, bem como novos tipos de interação tem sido promovidos à medida em que as tecnologias avançam. Este trabalho investiga a natureza da relação humano-computador, o uso contextualizado de recursos computacionais interativos e os fatores humanos relacionados à interação por meio de recursos de um ambiente virtual de aprendizagem em uma disciplina de pós-graduação stricto-sensu por meio de uma imersão participante, em que a tecnologia se colocou como elemento midiatizador da interação dialógica promovida pela proposta pedagógica e pela ação docente intencionalmente construída. Buscou-se dar voz aos sujeitos para que eles avaliassem a usabilidade da tecnologia sob a sua perspectiva. Foram utilizadas diversas ferramentas para coleta de dados, como entrevista, grupo focal, registros de fórum, questionários de fluência digital e de avaliação de usabilidade técnica percebida. Tais ferramentas fundamentaram a compreensão do impacto do tratamento didático do diálogo midiatizado por tecnologias computacionais interativas na percepção de qualidade da Interação Humano-Computador. Por meio de uma análise dialética dos dados pautada em critérios de usabilidade técnica e nas categorias de interação dialógica da filosofia educacional de Paulo Freire...

Vision-based gesture recognition system for human-computer interaction

Trigueiros, Paulo; Ribeiro, António Fernando; Reis, Luis Paulo
Fonte: CRC Press Publicador: CRC Press
Tipo: Conferência ou Objeto de Conferência
Publicado em //2013 ENG
Relevância na Pesquisa
95.86%
Hand gesture recognition, being a natural way of human computer interaction, is an area of active research in computer vision and machine learning. This is an area with many different possible applications, giving users a simpler and more natural way to communicate with robots/systems interfaces, without the need for extra devices. So, the primary goal of gesture recognition research is to create systems, which can identify specific human gestures and use them to convey information or for device control. This work intends to study and implement a solution, generic enough, able to interpret user commands, composed of a set of dynamic and static gestures, and use those solutions to build an application able to work in a realtime human-computer interaction systems. The proposed solution is composed of two modules controlled by a FSM (Finite State Machine): a real time hand tracking and feature extraction system, supported by a SVM (Support Vector Machine) model for static hand posture classification and a set of HMMs (Hidden Markov Models) for dynamic single stroke hand gesture recognition. The experimental results showed that the system works very reliably, being able to recognize the set of defined commands in real-time. The SVM model for hand posture classification...

Integrating user studies into computer graphics-related courses

Santos, B.S.; Dias, P.; Silva, S.; Ferreira, C.; Madeira, J.
Fonte: IEEE Computer Society Publicador: IEEE Computer Society
Tipo: Artigo de Revista Científica
ENG
Relevância na Pesquisa
85.83%
The authors argue in favor of introducing user studies into computer graphics, human-computer interaction, and information visualization courses. They discuss two sets of user studies they developed and performed over several years, with student collaboration, and the different aspects of the studies they had to consider. They also discuss a user study they designed for an information visualization course. © 2011 IEEE.

Analysis of an educational software for language learning: insights from the Theory of Structural Cognitive Modifiability and Human-Computer Interaction

Prebianca,Gicele Vieira; Santos Junior,Vital Pereira dos; Finardi,Kyria Rebeca
Fonte: Pontifícia Universidade Católica de São Paulo - PUC-SP Publicador: Pontifícia Universidade Católica de São Paulo - PUC-SP
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/01/2014 EN
Relevância na Pesquisa
95.79%
The aim of the study is to analyze a software for teaching English as a foreign language reporting (i) the interaction between the software and the learner; (ii) the cognitive/mental operations required to perform the tasks in software and (iii) the pedagogical strategies implemented by the software. Human-Computer Interaction (HCI) aspects of the software were also analyzed so as to evaluate its degree of interactiveness and usability (Ergolist, 2011). Results of the study suggest that the software is content-oriented and the ergonomic analysis revealed that the didactic resources applied by the software meet most usability criteria, requiring few modifications.

Living in Two Worlds: A Critical Ethnography of Academic and Proto-Professional Interactions in a Human-Computer Interaction Design Studio

Gray, Colin Michael
Fonte: [Bloomington, Ind.] : Indiana University Publicador: [Bloomington, Ind.] : Indiana University
Tipo: Doctoral Dissertation
EN
Relevância na Pesquisa
95.77%
Thesis (Ph.D.) - Indiana University, School of Education, 2014; Studio pedagogy has been used broadly in traditional design disciplines for over a century, functioning as a signature pedagogy. This pedagogical approach is increasingly being adopted in non-traditional design disciplines, often without an understanding of why this pedagogy is effective from an instructional design perspective, or how its theoretical structures may function in disciplines outside of the design tradition. In this dissertation, I investigated a Master's program at a large Midwestern university in human-computer interaction (HCI), one of these emergent design disciplines, capturing the occurrence and underlying structures of communication as they emerged in informal dimensions of the pedagogy as experienced and enacted by students. To produce a critical ethnography of this site, I collected data as a participant observer for two academic semesters, compiling over 450 contact hours, thousands of photographs, hundreds of hours of audio, and 30 critical interviews that were semi-structured, focused on specific topic domains. Almost two-thirds of the contact hours were located in a non-classroom studio space, where I interacted with students as they worked and socialized. The remaining contact hours were spent in classroom observations during the second semester of data collection...

A survey on Human Computer Interaction Mechanism Using Finger Tracking

Shah, Kinjal N.; Rathod, Kirit R.; Agravat, Shardul J.
Fonte: Universidade Cornell Publicador: Universidade Cornell
Tipo: Artigo de Revista Científica
Publicado em 04/02/2014
Relevância na Pesquisa
95.86%
Human Computer Interaction (HCI) is a field in which developer makes a user friendly system. User can interact with a computer system without using any conventional peripheral devices. Marker is used to recognize hand movement accurately & successfully. Researchers establish the mechanism to interact with computer system using computer vision. The interaction is better than normal static keyboard and mouse. This paper represents most of innovative mechanisms of the finger tracking used to interact with a computer system using computer vision.; Comment: 4 pages, 8 figures, International Journal of Computer Trends and Technology (IJCTT)

A Glance into the Future of Human Computer Interaction

Farooq, Umer; Iqbal, M. Aqeel; Nazir, Sohail
Fonte: Universidade Cornell Publicador: Universidade Cornell
Tipo: Artigo de Revista Científica
Publicado em 20/07/2011
Relevância na Pesquisa
95.95%
Computers have a direct impact on our lives nowadays. Human's interaction with the computer has modified with the passage of time as improvement in technology occurred the better the human computer interaction became. Today we are facilitated by the operating system that has reduced all the complexity of hardware and we undergo our computation in a very convenient way irrespective of the process occurring at the hardware level. Though the human computer interaction has improved but it's not done yet. If we come to the future the computer's role in our lives would be a lot more rather our life would be of the artificial intelligence. In our future the biggest resource would be component of time and wasting time for a key board entry or a mouse input would be unbearable so the need would be of the computer interaction environment that along with the complexity reduction also minimizes the time wastage in the human computer interaction. Accordingly in our future the computation would also be increased it would not be a simple operating system limited to a computer it would be computers managing our entire life activities hence fall out of domain of present computers electronic based architecture .In this research paper we propose a model that shall be meeting the future human computer interaction needs possessing linguistic human computer interference environment based on surface technology...

Implementation of Hand Detection based Techniques for Human Computer Interaction

Dhawan, Amiraj; Honrao, Vipul
Fonte: Universidade Cornell Publicador: Universidade Cornell
Tipo: Artigo de Revista Científica
Publicado em 29/12/2013
Relevância na Pesquisa
95.9%
The computer industry is developing at a fast pace. With this development almost all of the fields under computers have advanced in the past couple of decades. But the same technology is being used for human computer interaction that was used in 1970s. Even today the same type of keyboard and mouse is used for interacting with computer systems. With the recent boom in the mobile segment touchscreens have become popular for interaction with cell phones. But these touchscreens are rarely used on traditional systems. This paper tries to introduce methods for human computer interaction using the users hand which can be used both on traditional computer platforms as well as cell phones. The methods explain how the users detected hand can be used as input for applications and also explain applications that can take advantage of this type of interaction mechanism.

Effective Use of Human Computer Interaction in Digital Academic Supportive Devices

Thuseethan, S.; Kuhanesan, S.
Fonte: Universidade Cornell Publicador: Universidade Cornell
Tipo: Artigo de Revista Científica
Publicado em 02/01/2015
Relevância na Pesquisa
95.92%
In this research, a literature in human-computer interaction is reviewed and the technology aspect of human computer interaction related with digital academic supportive devices is also analyzed. According to all these concerns, recommendations to design good human-computer digital academic supportive devices are analyzed and proposed. Due to improvements in both hardware and software, digital devices have unveiled continuous advances in efficiency and processing capacity. However, many of these systems are also becoming larger and increasingly more complex. Although such complexity usually poses no difficulties for many users, it often creates barriers for academic users while using digital devices. Usually, in designing those digital devices, the human-computer interaction is left behind without consideration. To achieve dependable, usable, and well-engineered interactive digital academic supportive devices requires applied human computer interaction research and awareness of its issues.

Improving Human-Computer Interaction by Developing Culture-sensitive Applications based on Common Sense Knowledge

Anacleto, Junia Coutinho; de Carvalho, Aparecido Fabiano Pinatti
Fonte: Universidade Cornell Publicador: Universidade Cornell
Tipo: Artigo de Revista Científica
Publicado em 03/01/2010
Relevância na Pesquisa
95.82%
The advent of Web 3.0, claiming for personalization in interactive systems (Lassila & Hendler, 2007), and the need for systems capable of interacting in a more natural way in the future society flooded with computer systems and devices (Harper et al., 2008) show that great advances in HCI should be done. This chapter presents some contributions of LIA for the future of HCI, defending that using common sense knowledge is a possibility for improving HCI, especially because people assign meaning to their messages based on their common sense and, therefore, the use of this knowledge in developing user interfaces can make them more intuitive to the end-user. Moreover, as common sense knowledge varies from group to group of people, it can be used for developing applications capable of giving different feedback for different target groups, as the applications presented along this chapter illustrate, allowing, in this way, interface personalization taking into account cultural issues. For the purpose of using common sense knowledge in the development and design of computer systems, it is necessary to provide an architecture that allows it. This chapter presents LIAs approaches for common sense knowledge acquisition, representation and use...

Review of the Use of Electroencephalography as an Evaluation Method for Human-Computer Interaction

Frey, Jérémy; Mühl, Christian; Lotte, Fabien; Hachet, Martin
Fonte: Universidade Cornell Publicador: Universidade Cornell
Tipo: Artigo de Revista Científica
Publicado em 09/11/2013
Relevância na Pesquisa
95.79%
Evaluating human-computer interaction is essential as a broadening population uses machines, sometimes in sensitive contexts. However, traditional evaluation methods may fail to combine real-time measures, an "objective" approach and data contextualization. In this review we look at how adding neuroimaging techniques can respond to such needs. We focus on electroencephalography (EEG), as it could be handled effectively during a dedicated evaluation phase. We identify workload, attention, vigilance, fatigue, error recognition, emotions, engagement, flow and immersion as being recognizable by EEG. We find that workload, attention and emotions assessments would benefit the most from EEG. Moreover, we advocate to study further error recognition through neuroimaging to enhance usability and increase user experience.; Comment: PhyCS 2014 - International Conference on Physiological Computing Systems (2014)

Speech: A Challenge to Digital Signal Processing Technology for Human-to-Computer Interaction

Shrawankar, Urmila; Mahajan, Anjali
Fonte: Universidade Cornell Publicador: Universidade Cornell
Tipo: Artigo de Revista Científica
Publicado em 08/05/2013
Relevância na Pesquisa
85.85%
This software project based paper is for a vision of the near future in which computer interaction is characterized by natural face-to-face conversations with lifelike characters that speak, emote, and gesture. The first step is speech. The dream of a true virtual reality, a complete human-computer interaction system will not come true unless we try to give some perception to machine and make it perceive the outside world as humans communicate with each other. This software project is under development for listening and replying machine (Computer) through speech. The Speech interface is developed to convert speech input into some parametric form (Speech-to-Text) for further processing and the results, text output to speech synthesis (Text-to-Speech); Comment: Pages: 06 Figures : 06. arXiv admin note: text overlap with arXiv:1305.1429, arXiv:1305.1428

Citation Counting, Citation Ranking, and h-Index of Human-Computer Interaction Researchers: A Comparison between Scopus and Web of Science

Meho, Lokman I.; Rogers, Yvonne
Fonte: Universidade Cornell Publicador: Universidade Cornell
Tipo: Artigo de Revista Científica
Publicado em 12/03/2008
Relevância na Pesquisa
95.81%
This study examines the differences between Scopus and Web of Science in the citation counting, citation ranking, and h-index of 22 top human-computer interaction (HCI) researchers from EQUATOR--a large British Interdisciplinary Research Collaboration project. Results indicate that Scopus provides significantly more coverage of HCI literature than Web of Science, primarily due to coverage of relevant ACM and IEEE peer-reviewed conference proceedings. No significant differences exist between the two databases if citations in journals only are compared. Although broader coverage of the literature does not significantly alter the relative citation ranking of individual researchers, Scopus helps distinguish between the researchers in a more nuanced fashion than Web of Science in both citation counting and h-index. Scopus also generates significantly different maps of citation networks of individual scholars than those generated by Web of Science. The study also presents a comparison of h-index scores based on Google Scholar with those based on the union of Scopus and Web of Science. The study concludes that Scopus can be used as a sole data source for citation-based research and evaluation in HCI, especially if citations in conference proceedings are sought and that h scores should be manually calculated instead of relying on system calculations.; Comment: 35 pages...

The role of colour preattentive processing in human-computer interaction task efficiency: a preliminary study

Michalski, Rafal; Grobelny, Jerzy
Fonte: Universidade Cornell Publicador: Universidade Cornell
Tipo: Artigo de Revista Científica
Publicado em 28/11/2012
Relevância na Pesquisa
95.81%
In this paper, results of experimental research on the preattentive mechanism in the human-computer interaction (HCI) were presented. Fifty four subjects were asked to find interface elements from various panel structures. The arrangements were differentiated by their orientation (vertical, horizontal), colour pattern (ordered, unordered) and object background colours (green-blue, green-red, blue-red). The main finding of the study generally confirms the profits provided by the visual preattentive processing of the colour feature in graphical panel operation efficiency. However, the vertical way of arranging the items in search layouts resulted in decreasing the preattentive effect related to the item background colour. In regular, chessboard-like patterns of different coloured items, the effect of the early vision was less salient than in the case of structures with randomly dispersed colours. The reported results can help in designing efficient graphical user-computer interfaces in many interactive information systems.

A Glance into the Future of Human Computer Interactions

Farooq, Umer; Iqbal, M. Aqeel; Nazir, Sohail
Fonte: Universidade Cornell Publicador: Universidade Cornell
Tipo: Artigo de Revista Científica
Publicado em 21/07/2011
Relevância na Pesquisa
85.94%
Computers have a direct impact on our lives nowadays. Human's interaction with the computer has modified with the passage of time as improvement in technology occurred the better the human computer interaction became. Today we are facilitated by the operating system that has reduced all the complexity of hardware and we undergo our computation in a very convenient way irrespective of the process occurring at the hardware level. Though the human computer interaction has improved but it's not done yet. If we come to the future the computer's role in our lives would be a lot more rather our life would be of the artificial intelligence. In our future the biggest resource would be component of time and wasting time for a key board entry or a mouse input would be unbearable so the need would be of the computer interaction environment that along with the complexity reduction also minimizes the time wastage in the human computer interaction. Accordingly in our future the computation would also be increased it would not be a simple operating system limited to a computer it would be computers managing our entire life activities hence fall out of domain of present computers electronic based architecture .In this research paper we propose a model that shall be meeting the future human computer interaction needs possessing linguistic human computer interference environment based on surface technology...

From Human-Computer Interaction to Human-Robot Social Interaction

Toumi, Tarek; Zidani, Abdelmadjid
Fonte: Universidade Cornell Publicador: Universidade Cornell
Tipo: Artigo de Revista Científica
Publicado em 03/12/2014
Relevância na Pesquisa
95.93%
Human-Robot Social Interaction became one of active research fields in which researchers from different areas propose solutions and directives leading robots to improve their interactions with humans. In this paper we propose to introduce works in both human robot interaction and human computer interaction and to make a bridge between them, i.e. to integrate emotions and capabilities concepts of the robot in human computer model to become adequate for human robot interaction and discuss challenges related to the proposed model. Finally an illustration through real case of this model will be presented.

Generic system for human-computer gesture interaction: applications on sign language recognition and robotic soccer refereeing

Trigueiros, Paulo; Ribeiro, António Fernando; Reis, L. P.
Fonte: Springer Netherlands Publicador: Springer Netherlands
Tipo: Artigo de Revista Científica
Publicado em //2015 ENG
Relevância na Pesquisa
85.89%
Hand gestures are a powerful way for human communication, with lots of potential applications in the area of human computer interaction. Vision-based hand gesture recognition techniques have many proven advantages compared with traditional devices, giving users a simpler and more natural way to communicate with electronic devices. This work proposes a generic system architecture based in computer vision and machine learning, able to be used with any interface for human-computer interaction. The proposed solution is mainly composed of three modules: a pre-processing and hand segmentation module, a static gesture interface module and a dynamic gesture interface module. The experiments showed that the core of visionbased interaction systems could be the same for all applications and thus facilitate the implementation. For hand posture recognition, a SVM (Support Vector Machine) model was trained and used, able to achieve a final accuracy of 99.4%. For dynamic gestures, an HMM (Hidden Markov Model) model was trained for each gesture that the system could recognize with a final average accuracy of 93.7%. The proposed solution as the advantage of being generic enough with the trained models able to work in real-time, allowing its application in a wide range of human-machine applications. To validate the proposed framework two applications were implemented. The first one is a real-time system able to interpret the Portuguese Sign Language. The second one is an online system able to help a robotic soccer game referee judge a game in real time.

Generic system for human-computer gesture interaction

Trigueiros, Paulo; Ribeiro, António Fernando; Reis, L. P.
Fonte: IEEE Publicador: IEEE
Tipo: Artigo de Revista Científica
Publicado em /05/2014 ENG
Relevância na Pesquisa
85.87%
Hand gestures are a powerful way for human communication, with lots of potential applications in the area of human computer interaction. Vision-based hand gesture recognition techniques have many proven advantages compared with traditional devices, giving users a simpler and more natural way to communicate with electronic devices. This work proposes a generic system architecture based in computer vision and machine learning, able to be used with any interface for humancomputer interaction. The proposed solution is mainly composed of three modules: a pre-processing and hand segmentation module, a static gesture interface module and a dynamic gesture interface module. The experiments showed that the core of vision-based interaction systems can be the same for all applications and thus facilitate the implementation. In order to test the proposed solutions, three prototypes were implemented. For hand posture recognition, a SVM model was trained and used, able to achieve a final accuracy of 99.4%. For dynamic gestures, an HMM model was trained for each gesture that the system could recognize with a final average accuracy of 93.7%. The proposed solution as the advantage of being generic enough with the trained models able to work in real-time...