Tomasz Kocejko

Gdansk University of Technology · Department of Biomedical Engineering

In this paper we present comprehensive system for communication with computer by gaze. One of the main assumptions behind this work was to provide solution that can be used with standard RGB webcam. The proposed comprehensive system included the eye tracking module and user interface for convenient gaze interaction with computer. As a result a full...

Familial hypercholesterolemia (FH) is a highly undiagnosed disease. Among FH patients, the onset of premature coronary artery disease is 13 times higher than in the general population. Early diagnosis and treatment is essential to prevent cardiovascular diseases and their complications, and to prolong life. One of the clinical criteria of FH is the...

In this paper we focus on the role of deep instance segmentation of laboratory rodents in thermal images. Thermal imaging is very suitable to observe the behaviour of laboratory animals, especially in low light conditions. It is an non-intrusive method allowing to monitor the activity of animals and potentially observe some physiological changes ex...

The reliable measurement of the pulse rate using remote photoplethysmography (PPG) is very important for many medical applications. In this paper we present how deep neural networks (DNNs) models can be used in the problem of PPG signal classification and pulse rate estimation. In particular, we show that the DNN-based classification results corres...

A wearable system for monitoring non-invasively signals invaluable when examining person suffering from vasovagal syncope is presented in the paper. Following signals are continuously recorded: electrocardiogram, photopletysmogram, impedance cardiogram and electrodermal resistance.

An unobtrusive, noninvasive and continuous pressure measurement is invaluable however, still being under research and development. There are many attempts proposing an appropriate relationship between pulse pressure velocity and pressure. Fifteen different formulas, both theoretical and experimental, describing relation between blood pressure and c...

The paper presents a preliminary meta-analysis of the sample correlation between pulse arrival time (PAT) and blood pressure (BP). The aim of the study was to verify sample correlation coefficient between PAT and BP using an affine model $ BP = a . PAT+b $ for systolic and diastolic blood pressure. The databases included in the search were the IEEE...

An influence of a human body position on ECG derived respiration (EDR) signal is presented in the paper. Examinations were performed during deep, suspended and normal breathing for eight people in four different body positions. EDR and thoracic impedance signals were compared using correlation and standard deviation coefficients. Obtained results h...

In this paper we present the possibility of using eGlasses eye tracking module as an extension for Scratch programming tool which is a visual programming language supporting computer skills learning. The main concept behind this project is to setup the interface for rapid interaction design. Eye tracking is a powerful tool for hands free communicat...

In this study we evaluated system architecture for the use of smart glasses as a viewer of information, as a source of medical data (vital sign measurements: temperature, pulse rate, and respiration rate), and as a filter of healthcare information. All activities were based on patient/device identification procedures using graphical markers or feat...

In this paper we investigate the effectiveness of the interaction using eye tracking and electromyography. Smart glasses requires reliable interfaces for controlling the graphic content displayed directly in front of the user's eye. Presented research is related with the eGlasses project, which is focused on the development of an open platform in t...

In this preliminary study we analyzed the possibility of the reliable measurement of biomedical signals with some potential hardware extensions of smart glasses. Using specially designed experimental prototypes four category of biomedical signals were measured: electrocardiograms, electromyograms, electroencephalograms and respiration waveforms. Ex...

We propose the use of smart glasses to collaborate with smart objects in the Internet of Things environment. Particularly we are focusing on new interaction methods and the analysis of acceptable reaction times in the process of object recognition using smart glasses. We evaluated the proposed method using user studies and experiments with three di...

Currently, the most precise way of reflecting the skills level is an expert's subjective assessment. In this paper we investigate the possibility of the use of eye tracking data for scalar quantitative and objective assessment of medical staff competency in EMR system navigation. According to the experiment conducted by Yarbus the observation proce...

In this paper, septic safe methods of interaction with smart glasses, due to the health care environment applications consideration, are presented. The main focus is on capabilities of an optical, proximity-based gesture sensor and eye-tracker input systems. The design of both interfaces is being adapted to the open smart glasses platform that is b...

This paper presents the algorithm for validation of electrodes locations for the thoracic impedance measurements. In particular the presented algorithm was designed to perform the telemetric sleep apnea monitoring. One of the problems, during the clinical tests of a developed device, was to preserve the repeatability of measurements. It strongly de...

An influence of head movements on the gaze estimation accuracy when using a head mounted eye tracking system is discussed in the paper. This issue has been examined for a multi-display environment. It was found that head movement (rotation) to some extent does not influence on the gaze estimation accuracy seriously. Acceptable results were obtained...

This paper presents the basic ideas of eye and gaze tracking in multiple-display environment. The algorithm for display detection and identification is described as well as the rules for gaze interaction in multi display environment. The core of the method is to use special LED markers and eye and scene tracking glasses. Scene tracking camera regis...

In the present study, a home monitoring healthcare system for elderly and chronic patients has been proposed. System was developed for three types of users: the patient, doctor and guardian. The system is adapted for continuous measurement of biomedical signals, depending on the patient's disease. The system analyzes the collected information and i...

The experiences with the eye tracker have highlighted new issues for further investigation and developing solution. On our ongoing research we are trying to combine two different biometric user authentication methods relying on gaze pattern recognition while face features matching. This article presents methodology of using the mobile eye tracking...

This article highlights the influence of multimedia and video tutorials in computer-based learning specifically geared toward the progressive education of the elderly. Education of the elderly requires instructors to identify methods of increasing knowledge through repetitious learning. In this article we examine the result of progressive learning...

In this paper the simple and robust method of measuring the pulse rate is presented. Elaborated algorithm allows for efficient pulse rate registration directly from face image captured from webcam. The desired signal was obtained by proper channel selection and principal component analysis. A developed non-contact method of heart rate monitoring is...

In the article a distributed supervisory system is presented. The system consists of a set of the measurement nodes to track and supervise the most common domestic media consumption. The main goal of the system is to determine activity of the habitants. This has been achieved by means of electrical energy, water and gas consumption tracking. Severa...

This article presents the tryout of increasing computer and internet security by means of complementing the authentication procedure with the gaze tracking. The eyes of the person who is being identified follow the point on the computer screen and eye movement tracking system is used to collect information about eye movements during the experiment....

This article presents the tryout of increasing computer and internet security by means of complementing the authentication procedure with the gaze tracking. The eyes of the person who is being identified follow the point on the computer screen and eye movement tracking system is used to collect information about eye movements during the experiment....

A design of an ergonomic and user-friendly pointing device for elderly people enabling them to operate a traditional windows-based operating system is presented in the paper. To mimic a more natural way of pointing at various things on the computer screen the traditional interface was combined with the gaze control pointing device. The gaze trackin...

In this paper methods for image simulation as seen by a color blinded and a method for constructing images of perceived color difference are presented. The work is also focused on the interactive color description of an image contents. As a result, the individuals having problems with color discrimination can identify colors in an image.

Health monitoring at home could be an important element of care and support environment for older people. Diversity of diseases and different needs of users require universal design of a home platform. In this work the design of multimodal platform for communication, training and patient monitoring at home is presented and discussed. Two specific p...

The paper introduces a project conducted to create a complex human computer interface based on restricted head movements, eye blinks and the wrist rotation.

This paper describes real-time daylight based eye gaze tracking system. Proposed solution consists of two video cameras, infrared markers and few electronic components. Usage of popular webcams makes the system inexpensive. In dual camera system one camera is used for pupil tracking while second one controls position of the head relative to the scr...

This paper describes real-time daylight based eye gaze tracking system. Proposed solution consists of two cameras, infrared markers and few electronic components. Usage of the popular Web cams makes the system inexpensive. In dual camera system one camera is used for pupil tracking while second one controls position of the head relative to the scre...

Two methods of a cursor movement controlling are presented. They are based on detecting an eye position or its fixation. The method based on detection the fixation appeared very fast and relatively inaccurate in opposition to the method based on controlling the eye position.