scholarly journals Extraction of Hidden Text from Images using DWT

2018 ◽  
Vol 7 (4.36) ◽  
pp. 419
Author(s):  
V. Beslin Geo ◽  
K. Sakthidasan @ Sankaran ◽  
P. Archana ◽  
M. Umarani
Keyword(s):  
Digital Images ◽  
Lossless Compression ◽  
Huffman Coding ◽  
Compression Process ◽  
Detection Approach ◽  
E Learning ◽  
Web Images ◽  
Spiht Algorithm ◽  
Text Images

Extraction of hidden text in web images, computer screen images, news, games and e-learning is a very important task in image processing. Compression of digital images leads to poor visual quality of background and text images. Digital images are significantly considered and segmented using DWT into text and background blocks. Huffman coding is used to perform the lossless compression process in the compressed text pixels and the SPIHT algorithm in employed to the compress the background pixels. The result of DWT segmentation shows fringes in the segmented text image. The proposed method uses connected region and edge detection approach which provides a segmented text from digital video stills. The segmented text is converted to binary image using luminance thresholding which leads to fine quality of extracted text. 

scholarly journals Analysis of DICOM Image Compression Alternative Using Huffman Coding

2019 ◽  
Vol 2019 ◽  
pp. 1-11 ◽  
Author(s):  
Romi Fadillah Rahmat ◽  
T. S. M. Andreas ◽  
Fahmi Fahmi ◽  
Muhammad Fermi Pasha ◽  
Mohammed Yahya Alzahrani ◽  
...  
Keyword(s):  
Medical Imaging ◽  
Lossless Compression ◽  
Huffman Coding ◽  
Imaging Procedures ◽  
Compression Method ◽  
File Size ◽  
Dicom Image ◽  
Dicom File ◽  
Original File

Compression, in general, aims to reduce file size, with or without decreasing data quality of the original file. Digital Imaging and Communication in Medicine (DICOM) is a medical imaging file standard used to store multiple information such as patient data, imaging procedures, and the image itself. With the rising usage of medical imaging in clinical diagnosis, there is a need for a fast and secure method to share large number of medical images between healthcare practitioners, and compression has always been an option. This work analyses the Huffman coding compression method, one of the lossless compression techniques, as an alternative method to compress a DICOM file in open PACS settings. The idea of the Huffman coding compression method is to provide codeword with less number of bits for the symbol that has a higher value of byte frequency distribution. Experiments using different type of DICOM images are conducted, and the analysis on the performances in terms of compression ratio and compression/decompression time, as well as security, is provided. The experimental results showed that the Huffman coding technique has the capability to compress the DICOM file up to 1 : 3.7010 ratio and up to 72.98% space savings.

scholarly journals Survey of Hybrid Image Compression Techniques

2017 ◽  
Vol 7 (4) ◽  
pp. 2206
Author(s):  
Emy Setyaningsih ◽  
Agus Harjoko
Keyword(s):  
Image Compression ◽  
Compression Ratio ◽  
Lossless Compression ◽  
Quality Data ◽  
Compression Method ◽  
Compression Process ◽  
High Quality ◽  
Compression Technique ◽  
Technique Development

A compression process is to reduce or compress the size of data while maintaining the quality of information contained therein. This paper presents a survey of research papers discussing improvement of various hybrid compression techniques during the last decade. A hybrid compression technique is a technique combining excellent properties of each group of methods as is performed in JPEG compression method. This technique combines lossy and lossless compression method to obtain a high-quality compression ratio while maintaining the quality of the reconstructed image. Lossy compression technique produces a relatively high compression ratio, whereas lossless compression brings about high-quality data reconstruction as the data can later be decompressed with the same results as before the compression. Discussions of the knowledge of and issues about the ongoing hybrid compression technique development indicate the possibility of conducting further researches to improve the performance of image compression method.

Problems of Distance Education

2018 ◽  
Vol 7 (1) ◽  
pp. 14-23 ◽  
Author(s):  
Rostislav Fojtík
Keyword(s):  
Distance Education ◽  
Distance Learning ◽  
Computer Science ◽  
Full Time ◽  
Advantages And Disadvantages ◽  
E Learning ◽  
Educational Requirements

Abstract Distance learning and e-learning have significantly developed in recent years. It is also due to changing educational requirements, especially for adults. The article aims to show the advantages and disadvantages of distance learning. Examples of the 20-year use of the distance learning form of computer science describe the difficulties associated with the implementation and implementation of this form of teaching. The results of students in the full-time and distance form of teaching in the bachelor’s study of computer science are compared. Long-term findings show that distant students have significantly lower scores in the first years of study than full-time bachelor students. In the following years of study, the differences diminish, and students’ results are comparable. The article describes the possibilities of improving the quality of distance learning.

METHODS OF NETWORK COMMUNICATIVE COMPETENCE DEVELOPING WHEN PREPARING FUTURE TEACHERS FOR PROFESSIONAL ACTIVITIES IN THE ELECTRONIC EDUCATIONAL ENVIRONMENT

2020 ◽  
Vol 22 (12) ◽  
pp. 21-27
Author(s):  
Kostikova N.A.
Keyword(s):  
Teaching Practice ◽  
Communicative Competence ◽  
Educational Environment ◽  
Learning Technologies ◽  
Future Teachers ◽  
Electronic Information ◽  
Professional Activities ◽  
E Learning ◽  
Selection Of

Currently, in the context of the widespread use of e-learning technologies and distance educational technologies, it is necessary to train future teachers, taking into account the peculiarities of solving professional problems in an electronic information and educational environment, to develop students' relevant competencies, including network communicative competence. Despite the large number of studies devoted to the communicative aspect of the teacher's activities, the problem of the formation of network communicative competence in the electronic information and educational environment has not been sufficiently studied. Based on the analysis of scientific literature, the results of the questionnaire survey of students, some methods of forming network communicative competence in future teachers in the study of various disciplines, in the course of teaching practice, and scientific research are proposed. The analysis of the conditions and factors that determine the choice of methods for the formation of the specified competence has been carried out. These factors are associated with the teachers' perception of the peculiarities of communication in the electronic information and educational environment, the didactic and communicative potential of resources and tools of the electronic information and educational environment, the choice of methods and technologies for organizing interaction, the selection of educational material that allows the development of components of network communicative competence, the design of tasks and exercises for the development of network communicative competence, the choice of modes, schemes and forms of organization of interaction, the organization of feedback, control of the level of formation of the network communicative competence, the implementation of reflection. The formed network communicative competence will contribute to a more effective solution by the teacher of communicative tasks in the electronic information and educational environment, which will improve the quality of training of future teachers in the electronic information and educational environment.

THE PROCESS OF DIGITALIZATION OF EDUCATIONAL INSTITUTIONS

2020 ◽  
Author(s):  
Муса Увайсович Ярычев
Keyword(s):  
Learning Environment ◽  
Education System ◽  
New Teacher ◽  
Educational Institutions ◽  
Quality Of Education ◽  
Necessary Condition ◽  
Teacher Competencies ◽  
Important Condition ◽  
E Learning

В статье рассматривается вопрос о цифровизации школы, как важном условии повышения качества образования. Организованная при помощи электронных форм среда обучения предоставляет ученикам большую самостоятельность. Необходимым условием совершенствования системы образования выступает создание новых, необходимых для цифровой экономики компетенций педагога. The article considers the issue of school digitalization as an important condition for improving the quality of education. The e-learning environment provides students with greater independence. A necessary condition for improving the education system is the creation of new teacher competencies necessary for the digital economy.

Calidad de servicio en proveedores de servicios IPTV

Ingenium ◽  
2012 ◽  
Vol 6 (13) ◽  
pp. 11
Author(s):  
Ángela Andrea García ◽  
Juan Carlos Cuéllar Q.
Keyword(s):  
Quality Of Service ◽  
E Learning

La posibilidades de interactividad propias de la IPTV (e.g., video bajo demanda, pago por ver, E-Learning), hacen prever, a corto plazo, el fortalecimiento de su presencia en el país. Esa masificación, sumada al hecho de ser un servicio que se presta en tiempo real y a su reconocida sensibilidad a la latencia, los retardos y la pérdida de paquetes, constituyen un reto para proveer un servicio que reúna las expectativas de calidad de sus usuarios. En esa tarea, administrar la prioridad en el tráfico puede ser fundamental. Los mecanismos de QoS (Quality of Service) pueden ser un gran aliado, al permitir el manejo rápido de aplicaciones de misión crítica. El artículo inicia con una visión general de la IPTV, sus servicios y arquitectura; la presentación de algunos conceptos aplicados al tema (e.g. QoS, QoE, IPTV sobre ADSL) y cierra con la presentación de mecanismos de calidad de servicio aplicados a IPTV y una valoración de la situación de dos proveedores de este servicio en Colombia.

Psychotherapeutic components of commercially available virtual reality games (Preprint)

2020 ◽  
Author(s):  
Almira Osmanovic Thunström ◽  
Iris Sarajlic Vuković ◽  
Lilas Ali ◽  
Tomas Larson ◽  
Steinn Steingrimsson
Keyword(s):  
Mental Health ◽  
Virtual Reality ◽  
Mental Health Problems ◽  
Treatment Strategies ◽  
Treatment Method ◽  
Health Problems ◽  
E Learning ◽  
The Mean ◽  
Unique Games

BACKGROUND Immersive virtual reality (VR) games are increasingly becoming part of everyday life. Several studies support immersive VR technology as a treatment method for mental health problems. There is however minimal research into the feasibility, prevalence, and quality of commercially available VR games on commercial platforms as tools for treatment or add on to treatment of mental health problems. OBJECTIVE The aim of this study was to explore the prevalence, feasibility and quality of commercially available games related to psychotherapy on a commercially available platform. METHODS We performed a search for keywords related to diagnosis and treatment strategies of mental health problems. The search was performed during March 27th on STEAM (VR content and gaming platform). A usability scale was used as a tool to look at the interaction and usability of the games, the VR-UI-UX-8. The tool contains 8 statements about usability scored 0-10, 0 indicating “Not at all” and 10 indicating “very much so”. The score ranges from 0-80 with a higher score indicating worse usability. RESULTS In total, 516 hits were found, 371 unique games. After the games were reviewed, 83 games passed the inclusion criteria, were purchased and played. Majority of the games which were excluded were either not connected to mental health, contained violence, adult content or were in other ways irrelevant or inappropriate. The mean score for the games on the VR-UI-UX-8 was 16.5 (standard deviation 15.8) with a range from 0-68. Most relevant and feasible games were found in the search words meditation, mindfulness, and LSD. CONCLUSIONS Commercial platforms hold great potential for VR games with psychotherapeutic components. The platforms are only at the beginning of the development towards serious games, e-learning and psychotherapeutic treatments. Currently the quality and usability for clinical and at home applicability are scarce, but hold great potential.

scholarly journals Dental Education Challenges during the COVID-19 Pandemic Period in Italy: Undergraduate Student Feedback, Future Perspectives, and the Needs of Teaching Strategies for Professional Development

Healthcare ◽  
2021 ◽  
Vol 9 (4) ◽  
pp. 454
Author(s):  
Giuseppe Varvara ◽  
Sara Bernardi ◽  
Serena Bianchi ◽  
Bruna Sinjari ◽  
Maurizio Piattelli
Keyword(s):  
Undergraduate Student ◽  
Teaching And Learning ◽  
Dental Education ◽  
Student Feedback ◽  
Categorical Variables ◽  
Practical Training ◽  
Learning Approaches ◽  
New Methods ◽  
E Learning

The COVID-19 pandemic literally stopped most human movement and activities as it initially spread, which included dental practices and dental education. This defined the need for significative changes in teaching and learning with the use of “e-learning” methods, also for traineeships. This study was designed to determine the undergraduate student perception of these new methods as part of their education. This involved 353 students attending the Dental School of the G. D’Annunzio University of Chieti–Pescara, from the first to the sixth years. A questionnaire in Italian and was set-up using “Google Forms” and sent by email to the students. The questionnaire was divided into three parts: the first part included questions for general information, including age, sex and year of course; the second part had multiple choice questions related to their evaluation of the e-learning teaching, using a scale of opinion in the replies to each question (e.g., “scarce”, “fair”, “satisfying”, “very good” and “excellent”); and the third part included two open questions to indicate the strengths and limitations of these new teaching and learning approaches. The categorical variables in the first and second parts of the questionnaire were evaluated using Chi squared tests, setting significance at p < 0.05, while the comments were evaluated qualitatively. The student feedback showed significant appreciation (p < 0.05) of the new methods and the efforts that the lecturers put in to provide lectures of as high a quality as possible. However, a lack of practical training was significantly perceived as an important problem in the structure of their new curriculum (p < 0.05). COVID-19 has been an epic tragedy that has hit the human population not only in terms of health and healthcare, but also quality of life. This includes the quality of dental education within universities. However, the pandemic can be seen to also represent motivation to invest in the necessary technological innovation to deliver the best possible education to our future dentists.

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