Cristian Postelnicu

• PhD Eng
• Lecturer at Transylvania University of Brașov

In this paper, we studied the effects of using Microsoft HoloLens 2 in a Metaverse-based collaborative mixed reality environment on the driver’s social presence while using an autonomous driving system. In (semi-) autonomous vehicles the driver is the system’s monitor, and the driving process becomes a secondary task. Our approach is motivated by t...

Blockchain proves to be a powerful technology that can drive forward the automotive industry. This paper describes how blockchain has been applied, which automotive areas are most interested in the technology, as well as the benefits and challenges of blockchain for the automotive industry by a systematic literature review. Blockchain offers many a...

To make the best decisions in real-world situations, autonomous vehicles require learning algorithms that process a large number of labeled images. This paper aims to compare the automatically generated saliency maps with attention maps obtained with an eye-tracking device in order to provide automated labeling of images for the learning algorithm....

Technological advances are changing every aspect of our lives, from the way we work, to how we learn and communicate. Advanced driver assistance systems (ADAS) have seen an increased interest due to the potential of ensuring a safer environment for all road users. This study investigates the use of a smartphone-based ADAS in terms of driving perfor...

In this paper, we propose a Natural User Interface (NUI) based on Leap Motion controller which enables intuitive manipulation of a 6-DOF Jaco robotic arm. By using this NUI interface, we aim to study the effects of hand movements and gestures for interaction with a robotic arm. We present a qualitative evaluation of the proposed NUI system by trial...

A hybrid brain-computer interface (BCI) is a system that combines multiple biopotentials or different types of devices with a typical BCI system to enhance the interaction paradigms and various functional parameters. In this paper we present the initial development of a hybrid BCI system based on steady state evoked potentials (SSVEP), eye tracking...

There are many examples of cultural events that distinguish people nationally. Celebrating this can bring people closer, as inhabitants of different countries share similar cultural values. This study investigates a sustainable way to enhance these types of events. On the occasion of the 2000-year anniversary of the death of the Roman poet Ovid, we...

This work aims to examine the reliability of smartphones that incorporate 3D depth sensors for 3D reconstruction of cultural heritage objects. The main focus is to compare the models generated with two image-based methods: photogrammetry and Tango Constructor application. The result are promising, showings that Tango-based method is an efficient wa...

This research is focused on the importance of using modern technologies in preserving and exploring Cultural Heritage (CH). Specifically, Augmented Reality (AR) has the potential to enhance the user experience related to cultural heritage. We briefly present the main technological approaches in CH and a state of the art in mobile augmented reality....

A fortified church is a building which has a religious meaning, but also played a defensive role in times of war. Many fortified churches from countries such as Romania, Slovenia, Switzerland, Poland, France, Denmark, Portugal, Germany or Belarus featured thick walls and high battlements and embrasures. However, Middle Age fortified churches are di...

In the last decades, more and more virtual systems are used for various activities: training, explanation, simulation, or verifying different concepts. This paper presents a first attempt to create a CogInfoCom channel through which a Virtual Reality (VR) system communicates with a natural cognitive system (prototype and physical experimental syste...

The P300-based Brain Computer Interfaces (BCIs) are widely used for communication purposes and proven to be fast and reliable. The present study aimed to identify the effects of a long term use of a P300-based spelling application for clinical healthy subjects under two display cases represented by a computer monitor and a head-mounted display (HMD...

Nowadays smartphone distractions are frequently encountered while driving and are causing an increasing number of crashes. A method to prevent them is related to the use of advanced driver assistance systems (ADAS) which ensures that the driver's attention will return to the road when he/she is tempted to use a smartphone. An experimental study bas...

Increasing road safety through the use of new technologies is of general interest. In this paper we present a mobile assistant that uses augmented reality. This assistant was tested in real driving conditions. The participants assessed the comprehensibility and usability through a questionnaire. Results show that novice drivers could improve their...

This paper presents a new application in the field of cultural heritage, allowing outdoor site exploration throughout different periods of time, based on Mobile Augmented Reality (MAR) technology. The purpose of this research is to allow a free interaction metaphor between users and heritage landmarks, and to enrich their travel experience with imp...

The use of smartphones while driving is a growing phenomenon that has reached alarming proportions. Playing games is a particular type of activity performed by drivers on their smartphones and is the subject of this paper. The study that was con-ducted aimed at investigating the influence of playing games on a smartphone while driving in a virtual...

The use of a wearable scoliosis monitoring system can improve the process of rehabilitation by offering objective information about the movement of the spine. Such a system provides a new source of knowledge to physicians and enables them to implement a more efficient treatment. The system uses magnetic and inertial measurement units (IMUs) that ar...

This paper presents the design and the architecture of an educational 3D application enabling reading books in Virtual Environments exploiting an Interactive Digital Storytelling paradigm, in order to disseminate culture using an entertaining approach particularly suitable for young people. We also present two case studies using this approach: the...

As Virtual Reality (VR) expands its application range in various domains, one area that benefits more and more from VR implementation is cultural heritage. This synergy has created a new research subject: virtual cultural heritage, with specific challenges and with the key issue being to reconstruct the 3D virtual model of a real cultural artefact...

We present the architecture of an Advanced Driver Assistance System (ADAS) based on common dual camera smartphones, emphasizing on the calibration procedure which is active during the initialization phase (prior to the actual driving). NAVIEYES project attempts to make use of the video information received from both the front and the rear cameras o...

In the recent period, video processing algorithms emerged as a valid solution to various problems, including the automation of some repetitive processes, for retrieving information from dynamic environments or the inspection of the physical state of human operators. On the other hand, with the latest advancements in the automotive industry, Advance...

In this paper, an approach for the virtual restoration of the religious heritage objects is proposed. The presented method is based on Augmented Reality technologies, which enable virtual restoration of the original heritage object by co-locating the reconstructed 3D virtual model with the real one. This method gives the opportunity to better perce...

A brain-neuronal computer interaction (BNCI) system can provide a communication channel for severely disabled people or a supplementary control channel for able-bodied subjects. In this paper a physiological hybrid P300-based speller that uses a modified stimulus presentation paradigm the half checkerboard paradigm (HCBP) is evaluated. The speller...

This paper describes a simple semantic graph based model for processing natural language commands issued to a mobile robot. The proposed model is intended for translating natural language commands given by naïve users into an action or sequence of actions that the robot can execute via its available functionality, in order to complete the commands....

Recently human-robot interaction (HRI) has become a highly researched topic in robotics, especially in assistive robotics systems. A category of persons that require special attention is represented by the disabled people. For persons suffering of amyotrophic lateral sclerosis or brainstem stroke there are a few available interfaces among which is...

Basketball has grown into an international sport played and watched by millions of people. This paper describes the implementation of a virtual basketball accelerator. The main purpose of our study was to devise an application that could literary help players in practicing a free throw game indoors. In the development of this project we used Matlab...

This paper evaluates a hybrid neurophysiological interface for controlling a virtual smart home. Electrooculography (EOG) and Electroencephalography (EEG) techniques are used for recording biosignals from the user’s body. The signals are further analyzed and translated into commands for controlling a virtual smart home. The purpose of the study was...

In-robotics functions, performed by the software, include data acquisition, motor control, sensor signals processing, perception of objects and navigation through environment. LabView provides a solution to the limited skills and the limited time problem that appears when we use programming environments like C++ or Java. This document introduces th...

Robots have a continuous increasing role in today's society as they have stepped in the human environment in order to better fulfill the more demanding and complex tasks. Ubiquitous technologies can enhance interaction between human and robot in order to achieve a more natural interaction. In this paper a framework for off-line programming of an in...

This paper proposes two paradigms for controlling a robotic arm by integrating Electrooculography (EOG) and Electroencephalography (EEG) recording techniques. The purpose of our study is to develop a feasible paradigm for helping disabled persons with their every-day needs. Using EOG, the robotic arm is placed at a desired location and, by EEG, th...

Developing neuroprostheses and advanced communication systems for patients with disabilities has involved considerable scientific and technological efforts. Many recent projects developed software and hardware based on BCIs for such patients. Principles of Brain Computer Interfaces (BCI), technologies used for this type of interfaces and the latest...

The actual usability of a Virtual Environment (VE) depends to a large extent on the multi-modal interaction interfaces. A multi-modal interaction system combines visual information with many interaction methods to provide flexible and powerful dialogue approaches, thus enabling users to choose single or multiple interactions. This paper is a revie...