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Rok 2021
Rok 2020
  • 3D Vision System for a Robotic Arm Based on Equal Baseline Camera Array

    This paper presents a lightweight 3D vision system called Equal Baseline Camera Array (EBCA). EBCA can work in different light conditions and it can be applied for measuring large range of distances. The system is a useful alternative to other known distance measuring devices such as structured-light 3D scanners, time-of-flight cameras, Light Detection and Ranging (LIDAR) devices and structure from motion techniques. EBCA can be...

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  • A Review of Emotion Recognition Methods Based on Data Acquired via Smartphone Sensors
    Publikacja

    In recent years, emotion recognition algorithms have achieved high efficiency, allowing the development of various affective and affect-aware applications. This advancement has taken place mainly in the environment of personal computers offering the appropriate hardware and sufficient power to process complex data from video, audio, and other channels. However, the increase in computing and communication capabilities of smartphones,...

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  • Factors Affecting the Effectiveness of Military Training in Virtual Reality Environment
    Publikacja
    • M. Gawlik-Kobylińska
    • P. Maciejewski
    • J. Lebiedź
    • A. Wysokińska-Senkus

    - Rok 2020

    In this paper, we explored the factors influencing the effectiveness of military trainings performed in a virtual reality environment. The rationale for taking up the topic is the fact that such trainings are often conducted under specific operational procedures. These procedures may create rigorous frameworks for all elements of the learning environment, including the teacher’s performance. Therefore, to ensure the most conducive...

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  • Texture Features for the Detection of Playback Attacks: Towards a Robust Solution

    This paper describes the new version of a method that is capable of protecting automatic speaker verification (ASV) systems from playback attacks. The presented approach uses computer vision techniques, such as the texture feature extraction based on Local Ternary Patterns (LTP), to identify spoofed recordings. Our goal is to make the algorithm independent from the contents of the training set as much as possible; we look for the...

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  • To Survive in a CBRN Hostile Environment: Application of CAVE Automatic Virtual Environments in First Responder Training
    Publikacja
    • P. Maciejewski
    • M. Gawlik-Kobylińska
    • J. Lebiedź
    • W. Ostant
    • D. Aydın

    - Rok 2020

    This paper is of a conceptual nature and focuses on the use of a specific virtual reality environment in civil-military training. We analyzed the didactic potential of so-called CAVE automatic virtual environments for First Responder training, a type of training that fills the gap between First Aid training and the training received by emergency medical technicians. Since real training involves live drills based on unexpected situations,...

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  • Trust-Based Model for the Assessment of the Uncertainty of Measurements in Hybrid IoT Networks
    Publikacja

    - SENSORS - Rok 2020

    The aim of this paper is to introduce a NUT model (NUT: network-uncertainty-trust) that aids the decrease of the uncertainty of measurements in autonomous hybrid Internet of Things sensor networks. The problem of uncertainty in such networks is a consequence of various operating conditions and varied quality of measurement nodes, making statistical approach less successful. This paper presents a model for decreasing the uncertainty...

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  • Weighted Clustering for Bees Detection on Video Images
    Publikacja

    This work describes a bee detection system to monitor bee colony conditions. The detection process on video images has been divided into 3 stages: determining the regions of interest (ROI) for a given frame, scanning the frame in ROI areas using the DNN-CNN classifier, in order to obtain a confidence of bee occurrence in each window in any position and any scale, and form one detection window from a cloud of windows provided by...

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  • Wirtualna rekonstrukcja Jaszczurki Gierłowskiej = Virtual reconstruction of Gierłowska’s Lizard
    Publikacja

    - Bursztynisko - Rok 2020

    Gdańsk znany jest z posiadania wielu osobliwości. Jedną z nich jest niewielka, choć licząca aż 44 miliony lat jaszczurka (podrząd Sauria, rodzina Lacertidae) zatopiona w trzyipółcentymetrowej bryłce bursztynu bałtyckiego – sukcynitu. Określa się ją mianem Jaszczurki Gierłowskiej, jako że w czerwcu 1997 r. znalazła ją na gdańskich Stogach bursztynniczka Gabriela Gierłowska. Obecnie bursztyn z jaszczurką oglądać można w Muzeum Bursztynu...

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Rok 2019
Rok 2018
Rok 2017
  • A new library for construction of automata
    Publikacja

    - Rok 2017

    We present a new library of functions that construct minimal, acyclic, deterministic, finite-state automata in the same format as the author's fsa package, and also accepted by the author's fadd library of functions that use finite-state automata as dictionaries in natural language processing.

  • Automatic recognition of therapy progress among children with autism
    Publikacja

    - Scientific Reports - Rok 2017

    The article presents a research study on recognizing therapy progress among children with autism spectrum disorder. The progress is recognized on the basis of behavioural data gathered via five specially designed tablet games. Over 180 distinct parameters are calculated on the basis of raw data delivered via the game flow and tablet sensors - i.e. touch screen, accelerometer and gyroscope. The results obtained confirm the possibility...

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  • Behaviometrics of Digital Games for Children with Autism Spectrum Disorder

    Te paper reports current stage of the project Automated Terapy Monitoring for Children with Developmental Disorders of Autism Spectrum (AUTMON), that aims at development of methods and tools to allow for the automatic evaluation of the therapy progress among children with autism. Finding objective measures suitable for evaluating therapy progress would let create a system supporting those who diagnose autism and the therapists...

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  • Multiclass AdaBoost Classifier Parameter Adaptation for Pattern Recognition

    The article presents the problem of parameter value selection of the multiclass ``one against all'' approach of an AdaBoost algorithm in tasks of object recognition based on two-dimensional graphical images. AdaBoost classifier with Haar features is still used in mobile devices due to the processing speed in contrast to other methods like deep learning or SVM but its main drawback is the need to assembly the results of binary...

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  • Playback Attack Detection: The Search for the Ultimate Set of Antispoof Features
    Publikacja

    - Rok 2017

    Automatic speaker verification systems are vulnerable to several kinds of spoofing attacks. Some of them can be quite simple – for example, the playback of an eavesdropped recording does not require any specialized equipment nor knowledge, but still may pose a serious threat for a biometric identification module built into an e-banking application. In this paper we follow the recent approach and convert recordings to images, assuming...

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  • Playback detection using machine learning with spectrogram features approach
    Publikacja

    This paper presents 2D image processing approach to playback detection in automatic speaker verification (ASV) systems using spectrograms as speech signal representation. Three feature extraction and classification methods: histograms of oriented gradients (HOG) with support vector machines (SVM), HAAR wavelets with AdaBoost classifier and deep convolutional neural networks (CNN) were compared on different data partitions in respect...

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  • Podstawy projektowania interfejsów użytkownika
    Publikacja

    - Rok 2017

    Dobry interfejs użytkownika to podstawa sukcesu każdej aplikacji! Poznaj różne sposoby komunikowania się użytkownika z komputerem Dowiedz się, co w kwestii interfejsu użytkownika oferują współczesne urządzenia i programy Naucz się projektować efektowne i proste w obsłudze interfejsy użytkownika Interfejs użytkownika to wizytówka każdej aplikacji komputerowej i strony WWW, a także brama zapewniająca dostęp do ich funkcji. Nawet...

  • Stereo Camera Upgraded to Equal Baseline Multiple Camera Set (EBMCS)
    Publikacja

    - Rok 2017

    The paper presents the results of using a set of five cameras called Equal Baseline Multiple Camera Set (EBMCS) for making 3D images, disparity maps and depth maps. Cameras in the set are located in the vicinity of each other and therefore the set can be used for the purpose of stereoscopy similarly as a stereo camera.EBMCS provides disparity maps and depth maps which have a better quality than these maps obtained with the use...

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  • Stereo vision with Equal Baseline Multiple Camera Set (EBMCS) for obtaining depth maps of plants

    This paper presents a method of improving the estimation of distances between an autonomous harvesting robot and plants with ripe fruits by using the vision system based on five cameras. The system is called Equal Baseline Multiple Camera Set (EBMCS). EBMCS has some features of a camera matrix and a camera array. EBMCS is regarded as a set of stereo cameras for estimating distances by obtaining disparity maps and depth maps. This...

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  • Virtual designs and reconstructions of amber works: Amber craftsman simulator
    Publikacja

    This paper presents the concept of visualization of amber works in a virtual reality cave. It describes problems encountered during the acquisition, modeling and rendering of geometrical objects distinguished by heterogeneous transparency.

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Rok 2016
  • Applications for investigating therapy progress of autistic children
    Publikacja

    The paper regards supporting behavioral therapy of autistic children with mobile applications, specifically applied for measuring the child’s progress. A family of five applications is presented, that was developed as an investigation tool within the project aimed at automation of therapy progress monitoring. The applications were already tested with children with autism spectrum disorder. Hereby we analyse children’ experience...

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  • Applications of Immersive 3D Visualization Lab
    Publikacja

    The paper presents Immersive 3D Visualization Lab (at the Faculty of Electronics, Telecommunications and Informatics at Gdańsk University of Technology in Poland) and its applications prepared after its launch in December 2014. The main device of the lab is a virtual reality cubic cave with six screen-walls, where a person can navigate in virtual space using different controllers. The most sophisticated controller is a freely rotating...

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  • Automatic recognition of males and females among web browser users based on behavioural patterns of peripherals usage
    Publikacja

    - Internet Research - Rok 2016

    Purpose The purpose of this paper is to answer the question whether it is possible to recognise the gender of a web browser user on the basis of keystroke dynamics and mouse movements. Design/methodology/approach An experiment was organised in order to track mouse and keyboard usage using a special web browser plug-in. After collecting the data, a number of parameters describing the users’ keystrokes, mouse movements and clicks...

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  • Comparison of selected off-the-shelf solutions for emotion recognition based on facial expressions

    The paper concerns accuracy of emotion recognition from facial expressions. As there are a couple of ready off-the-shelf solutions available in the market today, this study aims at practical evaluation of selected solutions in order to provide some insight into what potential buyers might expect. Two solutions were compared: FaceReader by Noldus and Xpress Engine by QuantumLab. The performed evaluation revealed that the recognition...

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  • Evaluation of affective intervention process in development of affect-aware educational video games
    Publikacja

    - Rok 2016

    In this paper initial experiences are presented on implementing specific methodology of affective intervention design (AFFINT) for development of affect-aware educational video games. In the described experiment, 10 student teams are to develop affect-aware educational video games using AFFINT to formalize the whole process. Although all projects are still in progress, first observations and conclusions may already be presented.

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  • Extraction of information from born-digital PDF documents for reproducible research

    Born-digital PDF electronic documents might reasonably be expected to preserve useful data units of their source originals that suffice to produce executable papers for reproducible research. Unfortunately, developers of authoring tools may adopt arbitrary PDF generation strategies, producing a plethora of internal data representations. Such common information units as text paragraphs, tables, function graphs and flow diagrams,...

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  • Feature Reduction Using Similarity Measure in Object Detector Learning with Haar-like Features
    Publikacja

    - Rok 2016

    This paper presents two methods of training complexity reduction by additional selection of features to check in object detector training task by AdaBoost training algorithm. In the first method, the features with weak performance at first weak classifier building process are reduced based on a list of features sorted by minimum weighted error. In the second method the feature similarity measures are used to throw away that features...

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  • Influence of Aggregating Window Size on Disparity Maps Obtained from Equal Baseline Multiple Camera Set (EBMCS)
    Publikacja

    - Rok 2016

    This paper is concerned with obtaining disparity maps on the basis of images from Equal Baseline Multiple Camera Set (EBMCS). EBMCS consists of a central camera and side cameras. Algorithms for obtaining disparity maps with the use of EBMCS take advantage of aggregating windows similarly to stereo matching algorithms for a stereo camera, a camera matrix or a camera array. The paper analyzes the influence of aggregating window size...

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  • Methodology of Affective Intervention Design for Intelligent Systems

    This paper concerns how intelligent systems should be designed to make adequate, valuable and natural affective interventions. The article proposes a process for choosing an affective intervention model for an intelligent system. The process consists of 10 activities that allow for step-by-step design of an affective feedback loop and takes into account the following factors: expected and desired emotional states, characteristics...

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  • Modelowanie i symulacja ruchu pojazdu zabytkowego podczas hamowania

    Opracowano model samochodu zabytkowego z wykorzystaniem metody masa-sprężyna, służącego do symulacji procesu hamowania pojazdu zabytkowego z możliwością pomiaru drogi hamowania. Konfiguracja sieci połączeń między punktami mas elementów zawieszenia oraz opony okazuje się mieć bardzo duży wpływ na zachowanie symulowanego samochodu podczas hamowania. Poprawność symulacji sprawdzono porównując wyniki uzyskane z symulacji oraz z pomiarów...

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  • Similarity Measures for Face Images: An Experimental Study
    Publikacja

    - Rok 2016

    This work describes experiments aimed at finding a straightforward but effective way of comparing face images.We discuss properties of the basic concepts, such as the Euclidean, cosine and correlation metrics, test the simplest version of elastic templates, and compare these solutions with distances based on texture descriptors (Local Ternary Patterns). The influence of selected image processing methods (e.g. bilateral ltering)...

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  • Towards detecting programmers’ stress on the basis of keystroke dynamics

    The article describes the idea of detecting stress among programmers on the basis of keystroke dynamics. An experiment with a group of students of artificial intelligence classes was performed. Two samples of keystroke data were recorded for each case, the first while programming without stress, the second under time pressure. A number of timing and frequency parameters were calculated for each sample. Then statistical analysis...

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