Coppola, Gabriella; Hänggi, Dominik; Cassina, Gianluca; Verna, Carlalberta; Gkantidis, Nikolaos; Kanavakis, Georgios (2024). Three-dimensional video recordings: Accuracy, reliability, clinical and research guidelines - Reliability assessment of a 4D camera. (In Press). Orthodontics & craniofacial research Wiley 10.1111/ocr.12808
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Orthod_Craniofacial_Res_-_2024_-_Coppola_-_Three_dimensional_video_recordings_Accuracy_reliability_clinical_and_research.pdf - Published Version Available under License Creative Commons: Attribution (CC-BY). Download (2MB) | Preview |
OBJECTIVES
In addition to studying facial anatomy, stereophotogrammetry is an efficient diagnostic tool for assessing facial expressions through 3D video recordings. Current technology produces high-quality recordings but also generates extremely excessive data. Here, we compare various recording speeds for three standardized movements using the 3dMDface camera system, to assess its accuracy and reliability.
MATERIALS AND METHODS
A linear and two circular movements were performed using a 3D-printed cube mounted on a robotic arm. All movements were recorded initially at 60 fps (frames/second) and then at 30 and 15 fps. Recording accuracy was tested with best-fit superimpositions of consecutive frames of the 3D cube and calculation of the Mean Absolute Distance (MAD). The reliability of the recordings were tested with evaluation of the inter- and intra-examiner error.
RESULTS
The accuracy of movement recordings was excellent at all speeds (60, 30 and 15 fps), with variability in MAD values consistently being less than 1 mm. The reliability of the camera recordings was excellent at all recording speeds.
CONCLUSIONS
This study demonstrated that 3D recordings of facial expressions can be performed at 30 or even at 15 fps without significant loss of information. This considerably reduces the amount of produced data facilitating further processing and analyses.
Item Type: |
Journal Article (Original Article) |
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Division/Institute: |
04 Faculty of Medicine > School of Dental Medicine > Department of Orthodontics |
UniBE Contributor: |
Gkantidis, Nikolaos |
Subjects: |
600 Technology > 610 Medicine & health |
ISSN: |
1601-6343 |
Publisher: |
Wiley |
Language: |
English |
Submitter: |
Pubmed Import |
Date Deposited: |
15 May 2024 15:53 |
Last Modified: |
16 May 2024 15:24 |
Publisher DOI: |
10.1111/ocr.12808 |
PubMed ID: |
38746976 |
Uncontrolled Keywords: |
3d imaging 3dmd face‐scan stereophotogrammetry |
BORIS DOI: |
10.48350/196794 |
URI: |
https://boris.unibe.ch/id/eprint/196794 |
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