Now showing items 1-5 of 5

  • Bubble Captcha - A Start of the New Direction of Text Captcha Scheme Development 

    Bostik, Ondrej; Horak, Karel; Klecka, Jan (Institute of Automation and Computer Science, Brno University of Technology, 2017-06-01)
    CAPTCHA, A Completely Automated Public Turing test to tell Computers and Humans Apart, iswell-known system widely used in all sorts of internet services around the world designated to secure the webfrom an automatic malicious ...
  • Creating A Random Characters For Captcha Schemes From Existing Fonts 

    Bostik, Ondrej (Vysoké učení technické v Brně, Fakulta elektrotechniky a komunikačních technologií, 2018)
    For nearly a two decades, development of new mechanisms for securing web applications from unwanted traffic caused by automated programs called CAPTCHA schemes are under constant improvement. As significant fraction of ...
  • Segmentation Method Overview for Thermal Images in Matlab Computational Environment 

    Bostik, Ondrej; Valach, Sobeslav; Horak, Karel; Klecka, Jan (Institute of Automation and Computer Science, Brno University of Technology, 2019-06-24)
    This paper presents an overview of methods usable for segmentation of thermal images in MATLAB computational environment. The goal of this work is the demonstration usage of available methods and evaluate their performance. ...
  • Segmentation Of Thermal Images 

    Bostik, Ondrej (Vysoké učení technické v Brně, Fakulta elektrotechniky a komunikačních technologií, 2019)
    This paper presents our ongoing work focused on segmentation of thermal images from the process of traverse wedge rolling. The goal of this work is to evaluate some of the available methods. We mainly focused on a demonstration ...
  • Usability Evaluation of Randomly Generated Fonts for Bubble Captcha 

    Bostik, Ondrej; Horak, Karel; Klecka, Jan (Institute of Automation and Computer Science, Brno University of Technology, 2018-06-01)
    A Completely Automated Public Turing test to tell Computers and Humans Apart (CAPTCHA), is the wide-spread concept of systems suited to secure the web services from automated SPAM scripts. The most common CAPTCHA systems ...