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Publikasjoner (9 av 9) Visa alla publikasjoner
Pifferi, G., Rafiei, S., Schenkman, B., Sperandio, I., Djupsjöbacka, A., Andrén, B. & Brunnström, K. (2026). The Influence of Driver-age on Judging the Distance of Approaching Vehicles in Digital Rear-view Mirrors. In: Electronic Imaging: . Paper presented at Electronic Imaging (pp. 217-1-217-7). Society for Imaging Science & Technology
Åpne denne publikasjonen i ny fane eller vindu >>The Influence of Driver-age on Judging the Distance of Approaching Vehicles in Digital Rear-view Mirrors
Vise andre…
2026 (engelsk)Inngår i: Electronic Imaging, Society for Imaging Science & Technology , 2026, s. 217-1-217-7Konferansepaper, Publicerat paper (Fagfellevurdert)
Abstract [en]

Digital camera-based rear‑view systems are increasingly introduced as alternatives to traditional mirrors, offering potential benefits such as improved aerodynamics, reduced blind spots, and enhanced visibility. However, these systems alter the visual cues available to drivers by presenting a fixed monocular image, which might affect how distance and approach speed are judged. This study examines how driver-age influences distance estimation and decisions related to overtaking, while also assessing the impact of camera field of view and camera height. Fifty‑eight licensed car drivers viewed thirty‑six high‑resolution driving clips showing forward‑road scenes and digital rear‑view perspectives with systematically varied camera settings. They completed two tasks: judging the distance of an approaching vehicle and indicating the last moment at which a lane change would be considered safe. Age influenced both perceptual judgements and lane‑change decisions, though not always in the expected direction. Older drivers showed smaller overall errors, yet at wider fields of view they often shifted into overestimation, while younger drivers maintained conservative underestimation. Older drivers nevertheless selected more cautious lane‑change timings in certain conditions. Apparent accuracy advantages may reflect reduced bias rather than consistently safer perception; The results highlight the importance of accounting for user diversity when evaluating camera-based rear‑view systems and developing age‑inclusive design strategies.

sted, utgiver, år, opplag, sider
Society for Imaging Science & Technology, 2026
Emneord
Driver AgeCamera Monitor Systems (CMS)Digital rear-view mirrorDistance judgementLast Safe Gap; Field of View; Camera height; Advanced Driver-Assistance Systems (ADAS);
HSV kategori
Identifikatorer
urn:nbn:se:ri:diva-81947 (URN)10.2352/EI.2026.38.10.HVEI-217 (DOI)
Konferanse
Electronic Imaging
Forskningsfinansiär
Vinnova, 2023-00755
Tilgjengelig fra: 2026-07-06 Laget: 2026-07-06 Sist oppdatert: 2026-07-14bibliografisk kontrollert
Brunnström, K., Runsten Fredriksson, L. & Rafiei, S. (2025). Cloud gaming quality based on a passive video quality experiment and bootstrapped analysis. In: IS T Intl. Symposium Electronic Imaging Science Technol.: . Paper presented at IS and T International Symposium on Electronic Imaging Science and Technology. Society for Imaging Science and Technology (11)
Åpne denne publikasjonen i ny fane eller vindu >>Cloud gaming quality based on a passive video quality experiment and bootstrapped analysis
2025 (engelsk)Inngår i: IS T Intl. Symposium Electronic Imaging Science Technol., Society for Imaging Science and Technology , 2025, nr 11Konferansepaper, Publicerat paper (Fagfellevurdert)
Abstract [en]

The International Telecommunication Union has a project for developing objective quality models called Parametric Bitstream-Based Quality Assessment of Cloud Gaming services. The model will be divided into an interaction quality module and a video coding impairment module. To evaluate these two modules an experimental campaign was conducted where labs from different parts of the world performed user studies to collect data for the evaluation. This paper describes an experiment for collecting data to evaluate the video coding impairment module. The analysis is based on a bootstrapping approach.

sted, utgiver, år, opplag, sider
Society for Imaging Science and Technology, 2025
Emneord
Bootstrapping, Cloud gaming, Standardization, Video quality, Visual perception, Binary sequences, Data acquisition, Image coding, Quality control, Video analysis, Video signal processing, Bitstreams, Cloud gamings, Interaction quality, International telecommunications unions, Objective qualities, Quality assessment, Quality modeling
HSV kategori
Identifikatorer
urn:nbn:se:ri:diva-79217 (URN)10.2352/EI.2025.37.11.HVEI-211 (DOI)2-s2.0-105019037173 (Scopus ID)
Konferanse
IS and T International Symposium on Electronic Imaging Science and Technology
Merknad

Conference paper; Granskad

Tilgjengelig fra: 2025-12-18 Laget: 2025-12-18 Sist oppdatert: 2025-12-30bibliografisk kontrollert
Thulinsson, F., Söderlund, N., Rafiei, S., Schenkman, B., Djupsjöbacka, A., Andrén, B. & Brunnström, K. (2025). Impact of Camera height and Field-of-View on distance judgement and gap selection in digital rear-view mirrors in vehicles. In: IS T Intl. Symposium Electronic Imaging Science Technol.: . Paper presented at IS and T International Symposium on Electronic Imaging Science and Technology. Society for Imaging Science and Technology (11)
Åpne denne publikasjonen i ny fane eller vindu >>Impact of Camera height and Field-of-View on distance judgement and gap selection in digital rear-view mirrors in vehicles
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2025 (engelsk)Inngår i: IS T Intl. Symposium Electronic Imaging Science Technol., Society for Imaging Science and Technology , 2025, nr 11Konferansepaper, Publicerat paper (Fagfellevurdert)
Abstract [en]

This study investigates how different camera perspectives presented in digital rear-view mirrors in vehicles, also known as Camera Monitor Systems, impact drivers’ distance judgment and decision-making in dynamic driving scenarios. The study examines (1) the effects of field of view and (2) camera height on drivers' ability to judge distances to rearward vehicles and to select safe gaps in potentially hazardous situations. A controlled lab-based video experiment was conducted, involving 27 participants who performed distance estimations and last safe gap selections using a simulated side-view mirror display. Participants viewed prerecorded driving scenarios with varying combinations of field of view (40°, 76°, 112°) and camera heights (1 meter, 2.3 meter). No significant effects were found for camera height, but wider field of views led to more accurate distance estimations. However, the use of a wider field of view also increased the risk of potentially dangerous overestimations of distance, as evidenced by the last safe gap results. This suggests that a wider field of view leads to the selection of smaller and potentially risky gaps. Conversely, narrow field of views resulted in underestimations of distance, potentially leading to overly cautious and less efficient driving decisions. These findings inform Camera Monitor Systems design guidelines on how to improve driver perception and road safety, to reduce accidents from vehicle distance misjudgments.

sted, utgiver, år, opplag, sider
Society for Imaging Science and Technology, 2025
Emneord
Accidents, Behavioral research, Decision making, Display devices, Motor transportation, Vehicles, Camera perspectives, Distance estimation, Distance judgements, Driver abilities, Field of views, Judgment and decision makings, Monitor system, Rear-view mirrors, System impact, Wide field-ofview, Cameras
HSV kategori
Identifikatorer
urn:nbn:se:ri:diva-79194 (URN)10.2352/EI.2025.37.11.HVEI-199 (DOI)2-s2.0-105019037415 (Scopus ID)
Konferanse
IS and T International Symposium on Electronic Imaging Science and Technology
Merknad

Conference paper; Granskad

Tilgjengelig fra: 2025-11-25 Laget: 2025-11-25 Sist oppdatert: 2025-11-25bibliografisk kontrollert
Rafiei, S., Brunnström, K., Pifferi, G., Schenkman, B., Djupsjöbacka, A., Andérn, B. & Sj̈ostr̈om, M. (2025). User Study on Visual Interface Helpfulness in Remote Inspection Tasks Using Teleoperation. In: 2025 17th International Conference on Quality of Multimedia Experience, QoMEX 2025: . Paper presented at 17th International Conference on Quality of Multimedia Experience, QoMEX 2025, 30 September 2025 - 2 October 2025, Madrid. Institute of Electrical and Electronics Engineers (IEEE)
Åpne denne publikasjonen i ny fane eller vindu >>User Study on Visual Interface Helpfulness in Remote Inspection Tasks Using Teleoperation
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2025 (engelsk)Inngår i: 2025 17th International Conference on Quality of Multimedia Experience, QoMEX 2025, Institute of Electrical and Electronics Engineers (IEEE) , 2025Konferansepaper, Publicerat paper (Fagfellevurdert)
Abstract [en]

Teleoperation systems are increasingly used in remote inspection and maintenance, especially in safety-critical settings. This paper presents findings from a lab study examining user interaction with a teleoperation for airport safety inspection. The study investigates five visual interface configurations: First Person View (FPV), Third Person View (TPV), Augmented FPV, FPV+TPV, and Augmented FPV+TPV. Eighteen participants completed inspection tasks under each condition and rated interface helpfulness, workload (NASA-TLX), and simulator sickness. The result was confirmed by bootstrapping with 1000 iterations. Results showed that all view configurations were rated more helpful than TPV alone, with FPV-based combinations improving depth perception and spatial understanding. NASA-TLX revealed cognitive effort, while SSQ scores decreased post-task, particularly in oculomotor symptoms, suggesting adaptation. These findings support continued research into optimising visual interfaces for teleoperation in safety-critical settings

sted, utgiver, år, opplag, sider
Institute of Electrical and Electronics Engineers (IEEE), 2025
Emneord
Augmented Reality, Quality of Experience, Remote Control System, Unmanned Vehicles, User Experience
HSV kategori
Identifikatorer
urn:nbn:se:ri:diva-80044 (URN)10.1109/QoMEX65720.2025.11219981 (DOI)2-s2.0-105023902030 (Scopus ID)9798331554354 (ISBN)
Konferanse
17th International Conference on Quality of Multimedia Experience, QoMEX 2025, 30 September 2025 - 2 October 2025, Madrid
Merknad

This research has been funded by the Swedish Foundation for Strategic Research (SSF, dnr FID18-0030), and by Sweden's Innovation Agency (VINNOVA) through the projects CONTROL (dnr 2022-02670) and SCREENS II (dnr 2023-00755).

Tilgjengelig fra: 2025-12-16 Laget: 2025-12-16 Sist oppdatert: 2026-06-03bibliografisk kontrollert
Rafiei, S., Brunnström, K., Schenkman, B., Andersson, J. & Sjöström, M. (2024). Laboratory study: Human Interaction using Remote Control System for Airport Safety Management. In: 2024 16th International Conference on Quality of Multimedia Experience, QoMEX 2024: . Paper presented at 16th International Conference on Quality of Multimedia Experience, QoMEX 2024.Karlshamn, Sweden. 18 June 2024 through 20 June 2024 (pp. 167-170). Institute of Electrical and Electronics Engineers Inc.
Åpne denne publikasjonen i ny fane eller vindu >>Laboratory study: Human Interaction using Remote Control System for Airport Safety Management
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2024 (engelsk)Inngår i: 2024 16th International Conference on Quality of Multimedia Experience, QoMEX 2024, Institute of Electrical and Electronics Engineers Inc. , 2024, s. 167-170Konferansepaper, Publicerat paper (Fagfellevurdert)
Abstract [en]

Remote control technology for machines and robots has experienced significant advancement in many domains where visual information delivery is essential. Safety management at airports is one field that benefits from remote control systems, enabling operators to scan the airstrip for obstacles and debris. Depth perception and proper view position are critical in remote control systems, where operators need to accurately perceive 3D coordinates and maintain an appropriate perspective for performing tasks from a distance. This Demo paper presents a laboratory platform for an experimental study on human interaction with remote control systems using visual interfaces for inspection tasks to enhance airport safety management. The platform can evaluate the user experience of interfaces provided by First Person View, Third Person View, and Augmentation technologies. This platform enables exploration through controlled experiments and by user tests. These provide an avenue for assessing how these interfaces may affect human performance, depth perception, and user experience when conducting inspection tasks remotely. The findings will shed light on the strengths and limitations of each interface type, offering insights into their potential applications in various domains such as industrial inspection, surveillance, and remote exploration. 

sted, utgiver, år, opplag, sider
Institute of Electrical and Electronics Engineers Inc., 2024
Emneord
Accident prevention; Airport security; Airports; Augmented reality; Control systems; Depth perception; Ground vehicles; Inspection; Humaninteraction; Industrial remote control system; Inspection tasks; Laboratory studies; Quality of experience; Remote control systems; Safety management; Unmanned ground vehicle; Users’ experiences; Viewpoint position; Remote control
HSV kategori
Identifikatorer
urn:nbn:se:ri:diva-75009 (URN)10.1109/QoMEX61742.2024.10598280 (DOI)2-s2.0-85201060708 (Scopus ID)
Konferanse
16th International Conference on Quality of Multimedia Experience, QoMEX 2024.Karlshamn, Sweden. 18 June 2024 through 20 June 2024
Merknad

his research has been funded by the Swedish Foundation for Strategic Research (SSF dnr. FID18-0030) andby Sweden´s Innovation Agency (VINNOVA) through theCONTROL project (2022-02670).his research has been funded by the Swedish Foundation for Strategic Research (SSF dnr. FID18-0030) andby Sweden´s Innovation Agency (VINNOVA) through theCONTROL project (2022-02670).

Tilgjengelig fra: 2024-09-09 Laget: 2024-09-09 Sist oppdatert: 2025-09-23bibliografisk kontrollert
El Ouardi, K., Rafiei, S., Singhal, C. & Brunnström, K. (2024). User performance and Quality of Experience for a remote-controlled lab based moving platform. In: Electronic Imaging: . Paper presented at Symposium on electronic imaging (pp. 1-7). Society for Imaging Science & Technology, 36(11), Article ID 237.
Åpne denne publikasjonen i ny fane eller vindu >>User performance and Quality of Experience for a remote-controlled lab based moving platform
2024 (engelsk)Inngår i: Electronic Imaging, Society for Imaging Science & Technology , 2024, Vol. 36, nr 11, s. 1-7, artikkel-id 237Konferansepaper, Publicerat paper (Fagfellevurdert)
Abstract [en]

In this study, we designed an experiment using remote-controlled lab based moving platform to evaluate the impact of resolution, latency, and field of view on the Quality of Experience, performance, user experience and depth perception. The experiment involves two tasks: driving the platform to a stop point and parking it between two boxes. Participants provided feedback through questionnaires, and their experiences were analyzed. Seven participants between 30 and 57 (average of 37) years old participated. We used Google Forms for data collection, including pre-experiment and recurring questionnaires as well as a simulator sickness questionnaire. Despite the low number of test participants leading to uncertainty in quantitative analysis, significant effects were observed, albeit with contradictory statistical outcomes. The data suggests that lower latency corresponds to better performance, with participants not always perceiving higher latency accurately. Video quality notably impacts user experience, with higher resolution being preferred. 

sted, utgiver, år, opplag, sider
Society for Imaging Science & Technology, 2024
Emneord
Depth perception, Quality control, Quality of service, Uncertainty analysis, Field of views, Latency, Moving platform, Performance, Quality of experience, Remote controled lab based moving platform, Resolution, Stop points, User performance, Users’ experiences, Remote control
HSV kategori
Identifikatorer
urn:nbn:se:ri:diva-74703 (URN)10.2352/EI.2024.36.11.HVEI-237 (DOI)2-s2.0-85197224888 (Scopus ID)
Konferanse
Symposium on electronic imaging
Forskningsfinansiär
Vinnova, 2021-02107Vinnova, C2020/2-2Vinnova, 2022-02670Swedish Foundation for Strategic Research, FID18-0030
Merknad

This research has been funded by Sweden's Innovation Agency (VINNOVA, dnr. 2021-02107) through the Celtic-Next project IMMINENCE (C2020/2-2), and the VINNOVA project CONTROL (dnr. 2022-02670) as well as the Swedish foundation for strategic research (SSF dnr. FID18-0030).

Tilgjengelig fra: 2024-08-09 Laget: 2024-08-09 Sist oppdatert: 2025-09-23bibliografisk kontrollert
Rafiei, S., Singhal, C., Brunnström, K. & Sjöström, M. (2023). Human Interaction in Industrial Tele-Operated Driving: Laboratory Investigation. In: 2023 15th International Conference on Quality of Multimedia Experience (QoMEX): . Paper presented at 15th International Conference on Quality of Multimedia Experience (QoMEX) (pp. 91-94).
Åpne denne publikasjonen i ny fane eller vindu >>Human Interaction in Industrial Tele-Operated Driving: Laboratory Investigation
2023 (engelsk)Inngår i: 2023 15th International Conference on Quality of Multimedia Experience (QoMEX), 2023, s. 91-94Konferansepaper, Publicerat paper (Fagfellevurdert)
Abstract [en]

Tele-operated driving enables industrial operators to control heavy machinery remotely. By doing so, they could work in improved and safe workplaces. However, some challenges need to be investigated while presenting visual information from on-site scenes for operators sitting at a distance in a remote site. This paper discusses the impact of video quality (spatial resolution), field of view, and latency on users’ depth perception, experience, and performance in a lab-based tele-operated application. We performed user experience evaluation experiments to study these impacts. Overall, the user experience and comfort decrease while the users’ performance error increases with an increase in the glass-to-glass latency. The user comfort reduces, and the user performance error increases with reduced video quality (spatial resolution).

HSV kategori
Identifikatorer
urn:nbn:se:ri:diva-66330 (URN)10.1109/qomex58391.2023.10178441 (DOI)
Konferanse
15th International Conference on Quality of Multimedia Experience (QoMEX)
Merknad

This research has been funded by the Swedish foundation for strategic research (SSF dnr. FID18–0030) and has been supported by Sweden's Innovation Agency (VINNOVA, dnr. 2021–02107) through the Celtic-Next project IMMINENCE (C2020/2-2).

Tilgjengelig fra: 2023-09-06 Laget: 2023-09-06 Sist oppdatert: 2025-09-23bibliografisk kontrollert
Singhal, C., Rafiei, S. & Brunnström, K. (2023). Real-time Live-Video Streaming in Delay-Critical Application: Remote-Controlled Moving Platform. In: 2023 IEEE 98th Vehicular Technology Conference (VTC2023-Fall): . Paper presented at 2023 IEEE 98th Vehicular Technology Conference (VTC2023-Fall). Institute of Electrical and Electronics Engineers (IEEE)
Åpne denne publikasjonen i ny fane eller vindu >>Real-time Live-Video Streaming in Delay-Critical Application: Remote-Controlled Moving Platform
2023 (engelsk)Inngår i: 2023 IEEE 98th Vehicular Technology Conference (VTC2023-Fall), Institute of Electrical and Electronics Engineers (IEEE), 2023Konferansepaper, Publicerat paper (Fagfellevurdert)
Abstract [en]

Recent advancement in multimedia and communication network technology have made interactive multimedia and tele-operation applications possible. Teledriving, teleoperation, and video-based remote-controlling require real-time live-video streaming and are delay critical in principle. Supporting such applications over wireless networks for mobile users can pose fundamental challenges in maintaining video quality and service latency requirements. This paper investigates the factors affecting the end-to-end delay in a video-based, remotely controlled moving platform application. It involves the real-time acquisition of environmental information (visually) and the delay-sensitive video streaming to remote operators over wireless networks. This paper presents an innovative experimental testbed developed using a remote-controlled toy truck, off-the-shelf cameras, and wireless fidelity (Wi-Fi) network. It achieves ultra-low end-to-end latency and helped us in performing the delay, network, and video quality evaluations. Extending the experimental study, we also propose a real-time live-media streaming control (RTSC) algorithm that maximizes the video quality by selecting the best streaming (network, video, and camera) configuration while meeting the delay and network availability constraints. RTSC improves the live-streaming video quality by about 33% while meeting the ultra-low latency (< 200 milliseconds) requirement under constrained network availability conditions.

sted, utgiver, år, opplag, sider
Institute of Electrical and Electronics Engineers (IEEE), 2023
HSV kategori
Identifikatorer
urn:nbn:se:ri:diva-68534 (URN)10.1109/VTC2023-Fall60731.2023.10333522 (DOI)
Konferanse
2023 IEEE 98th Vehicular Technology Conference (VTC2023-Fall)
Merknad

This research has been funded by the Swedish foundation for strategic research (SSF dnr. FID18-0030) and has been supported by Sweden’s Innovation Agency (VINNOVA, 2021-02107) through the Celtic-Next project IMMINENCE (C2020/2-2) as well as the VINNOVA project CONTROL (2022-02670).

Tilgjengelig fra: 2023-12-13 Laget: 2023-12-13 Sist oppdatert: 2025-09-23bibliografisk kontrollert
Rafiei, S., Dima, E., Sjöström, M. & Brunnström, K. (2022). Augmented Remote Operating System for Scaling in smart mining applications: Quality of Experience aspects. In: Damon Chandler, Mark McCourt, Jeffrey Mulligan (Ed.), Proceedings of Human Vision and Electronic Imaging 2022: . Paper presented at IS and T International Symposium on Electronic Imaging: Human Vision and Electronic Imagings, HVEI 2022. , 34, Article ID HVEI-166.
Åpne denne publikasjonen i ny fane eller vindu >>Augmented Remote Operating System for Scaling in smart mining applications: Quality of Experience aspects
2022 (engelsk)Inngår i: Proceedings of Human Vision and Electronic Imaging 2022 / [ed] Damon Chandler, Mark McCourt, Jeffrey Mulligan, 2022, Vol. 34, artikkel-id HVEI-166Konferansepaper, Publicerat paper (Fagfellevurdert)
Abstract [en]

Remote operation and Augmented Telepresence are fields of interest for novel industrial applications in e.g., construction and mining. In this study, we report on an ongoing investigation of the Quality of Experience aspects of an Augmented Telepresencesystem for remote operation. The system can achieve view augmentation with selective content removal and Novel Perspective view generation. Two formal subjective studies have been performed with test participants scoring their experience while using the system with different levels of view augmentation. The participants also gave free-form feedback on the system and their experiences. The first experiment focused on the effects of in-view augmentations and interface distributions on wall patterns perception. The second one focused on the effects of augmentations on depth and 3D environment understanding. The participants’ feedback from experiment 1 showed that the majority of participants preferred to use the original cam-era views and the Disocclusion Augmentation view instead of the novel Perspective views. Moreover, the Disocclusion Augmentation, which was shown in combination with other views seemed beneficial. When the views were isolated in experiment 2, the impact of the Disocclusion Augmentation view was found to be lower than the Novel Perspective views.

HSV kategori
Identifikatorer
urn:nbn:se:ri:diva-58561 (URN)10.2352/EI.2022.34.11.HVEI-166 (DOI)85132420611 (Scopus ID)
Konferanse
IS and T International Symposium on Electronic Imaging: Human Vision and Electronic Imagings, HVEI 2022
Forskningsfinansiär
Swedish Foundation for Strategic Research, FID18-0030
Tilgjengelig fra: 2022-02-17 Laget: 2022-02-17 Sist oppdatert: 2025-09-23bibliografisk kontrollert
Organisasjoner
Identifikatorer
ORCID-id: ORCID iD iconorcid.org/0000-0002-5913-3145
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