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PEOPLE@HES-SO - Verzeichnis der Mitarbeitenden und Kompetenzen
PEOPLE@HES-SO - Verzeichnis der Mitarbeitenden und Kompetenzen

PEOPLE@HES-SO
Verzeichnis der Mitarbeitenden und Kompetenzen

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Chabloz Nicolas

Chabloz Nicolas

Maître d'enseignement

Hauptkompetenzen

Web Technologies

Virtual Reality

Augmented Reality

Web Security

Programming & Algorithms

  • Kontakt

  • Lehre

  • Publikationen

  • Konferenzen

Hauptvertrag

Maître d'enseignement

Büro: S205

Haute école d'Ingénierie et de Gestion du Canton de Vaud
Route de Cheseaux 1, 1400 Yverdon-les-Bains, CH
HEIG-VD
BSc HES-SO en Ingénierie des médias - Haute école d'Ingénierie et de Gestion du Canton de Vaud
  • Technologies web
  • Virtual Reality
  • Architecture orientée web
  • Algorithmic

2023

BiodivAR: :
Wissenschaftlicher Artikel ArODES
a cartographic authoring tool for the visualization of geolocated media in augmented reality

Julien Mercier, Nicolas Chabloz, Gregory Dozot, Olivier Ertz, Erwan Bocher, Daniel Rappo

ISPRS International Journal of Geo-Information,  2023, vol. 12, no. 2, article no. 61

Link zur Publikation

Zusammenfassung:

Location-based augmented reality technology for real-world, outdoor experiences is rapidly gaining in popularity in a variety of fields such as engineering, education, and gaming. By anchoring medias to geographic coordinates, it is possible to design immersive experiences remotely, without necessitating an in-depth knowledge of the context. However, the creation of such experiences typically requires complex programming tools that are beyond the reach of mainstream users. We introduce BiodivAR, a web cartographic tool for the authoring of location-based AR experiences. Developed using a user-centered design methodology and open-source interoperable web technologies, it is the second iteration of an effort that started in 2016. It is designed to meet needs defined through use cases co-designed with end users and enables the creation of custom geolocated points of interest. This approach enabled substantial progress over the previous iteration. Its reliance on geolocation data to anchor augmented objects relative to the user’s position poses a set of challenges: On mobile devices, GNSS accuracy typically lies between 1 m and 30 m. Due to its impact on the anchoring, this lack of accuracy can have deleterious effects on usability. We conducted a comparative user test using the application in combination with two different geolocation data types (GNSS versus RTK). While the test’s results are undergoing analysis, we hereby present a methodology for the assessment of our system’s usability based on the use of eye-tracking devices, geolocated traces and events, and usability questionnaires.

Impact of Geolocation Data on Augmented Reality Usability: A Comparative User Test
Wissenschaftlicher Artikel

Mercier Julien, Chabloz Nicolas, Dozot Grégory, Catherine Audrin, Ertz Olivier, Erwan Bocher, Rappo Daniel

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2023 , vol.  Volume XLVIII-4/W7-2023, pp.  133-140

Link zur Publikation

Zusammenfassung:

While the use of location-based augmented reality (AR) for education has demonstrated benefits on participants’ motivation, engagement, and on their physical activity, geolocation data inaccuracy causes augmented objects to jitter or drift, which is a factor in downgrading user experience. We developed a free and open source web AR application and conducted a comparative user test (n = 54) in order to assess the impact of geolocation data on usability, exploration, and focus. A control group explored biodiversity in nature using the system in combination with embedded GNSS data, and an experimental group used an external module for RTK data. During the test, eye tracking data, geolocated traces, and in-app user-triggered events were recorded. Participants answered usability questionnaires (SUS, UEQ, HARUS). We found that the geolocation data the RTK group was exposed to was less accurate in average than that of the control group. The RTK group reported lower usability scores on all scales, of which 5 out of 9 were significant, indicating that inaccurate data negatively predicts usability. The GNSS group walked more than the RTK group, indicating a partial effect on exploration. We found no significant effect on interaction time with the screen, indicating no specific relation between data accuracy and focus. While RTK data did not allow us to better the usability of location-based AR interfaces, results allow us to assess our system’s overall usability as excellent, and to define optimal operating conditions for future use with pupils. 

2023

Impact of geolocation data on augmented reality usability :
Konferenz ArODES
a comparative user test

Julien Mercier, Nicolas Chabloz, Grégory Dozot, Catherine Audrin, Olivier Ertz, Erwan Bocher, Daniel Rappo

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences ; Proceedings of the FOSS4G (Free and Open Source Software for Geospatial) 2023

Link zur Konferenz

Zusammenfassung:

While the use of location-based augmented reality (AR) for education has demonstrated benefits on participants’ motivation, engagement, and on their physical activity, geolocation data inaccuracy causes augmented objects to jitter or drift, which is a factor in downgrading user experience. We developed a free and open source web AR application and conducted a comparative user test (n = 54) in order to assess the impact of geolocation data on usability, exploration, and focus. A control group explored biodiversity in nature using the system in combination with embedded GNSS data, and an experimental group used an external module for RTK data. During the test, eye tracking data, geolocated traces, and in-app user-triggered events were recorded. Participants answered usability questionnaires (SUS, UEQ, HARUS).We found that the geolocation data the RTK group was exposed to was less accurate in average than that of the control group. The RTK group reported lower usability scores on all scales, of which 5 out of 9 were significant, indicating that inaccurate data negatively predicts usability. The GNSS group walked more than the RTK group, indicating a partial effect on exploration. We found no significant effect on interaction time with the screen, indicating no specific relation between data accuracy and focus. While RTK data did not allow us to better the usability of location-based AR interfaces, results allow us to assess our system’s overall usability as excellent, and to define optimal operating conditions for future use with pupils.

Augmented reality for visualizing and collecting data on biodiversity
Konferenz

Mercier Julien, Chabloz Nicolas, Dozot Grégory, Ertz Olivier, Rappo Daniel, Erwan Bocher

CitSciHelvetia’23, 29.03.2023 - 30.03.2023, Solothurn

Link zur Konferenz

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