Вісники та науково-технічні збірники, журнали
Permanent URI for this communityhttps://ena.lpnu.ua/handle/ntb/12
Browse
Search Results
Item Using captcha technology: pros and cons. ways to secure from spam-bots attacks(Видавництво Львівської політехніки, 2017-03-28) Boyko, N.; Stakhiv, M.; Lviv Polytechnic National UniversityРозглянуто технологію CAPTCHA. Подано алгоритм створення та роботи капчі. Наведено схему роботи капчі. Проаналізовано способи кодування та “ускладнення” зашифрованого тексту. Розглянуто основні способи автоматизованого розпізнавання CAPTCHA. Наведено варіанти визначення тестів CAPTCHA, методи програмних засобів та методи, які не потребують дій від користувача. Проаналізовано переваги та недоліки тестування капчі, а також способи вирішення проблем, що можуть виникати із застосуванням капчі.Item Building computer vision systems using machine learning algorithms(Commission of Motorization and Energetics in Agriculture, 2017) Boyko, N.; Sokil, N.; Lviv Polytechnic National UniversityIn this paper theoretic aspects of machine learning system in the field of computer vision is considered. There are presented methods of behavior analysis. There are offered tasks and problems associated with building systems using machine learning algorithm. The paper provides signs of problems that can be solved by using machine learning algorithms There is demonstrated step by step construction of computer vision system. The paper provides the algorithm of solving the problem of binary (two classes) classification for demonstration the machine learning algorithm possibilities in image recognition field, which can recognize the gender of the person on the photo. Aspects related to the search of data processing are also considered. There is analyzed the search of optimal parameters for algorithms. An interpretation of results in machine learning algorithm is provided. Binarization methods in machine learning algorithm are offered. There is analyzed the technology for improving the accuracy of machine learning algorithm. There are proposed ways to improve computer vision system in neural systems. Also there are analyzed large software modules that work using machine learning systems. The article provides prospects of powerful information technologies, which are necessary for the proper data selection in learning and configuration of feature extraction algorithm to create a computer vision system.Item Use of a cloud storage for implementation informational processes(Commission of Motorization and Energetics in Agriculture, 2017) Boyko, N.; Lviv Polytechnic National UniversityIn this paper, description of a concept of cloud storage is offered. One of the most practical methods of storing required information to cloud storage is also considered. Method of creating screenshots is proposed. Theoretical research is carried out and there are justified advantages and disadvantages of different methods of storing information in social networks. The best technique of creating screenshots has been practically implemented. Problems that might come up while working with approach given in this article and its solutions are stipulated. There is analyzed a necessity of setting a zoom parameter which is to transfer after transmitting size value of the picture in social networks. In the article the parameter that specifies the width of the final image and clearly affects the quality of the image is also considered. There is analyzed the effectiveness of creating an information system that saves time for such information processes as tracking the photo and its comments. In the paper the task of changing bets, which are not immediately fixed in social networks is optimized. Also there is implemented in practice a scalability problem of information processes in social networks. In the article a separation of the script is also put into practice. One part of which directly performs the request of image and downloads it to cloud storage. With help of another part the information process is transmitted on the photo where the user identifies.