Accuracy of Portable Face-Scanning Devices for Obtaining Three-Dimensional Face Models: A Systematic Review and Meta-Analysis

Hang-Nga Mai, Jaeil Kim, Youn-Hee Choi and Du-Hyeong Lee
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Hang-Nga Mai: Institute for Translational Research in Dentistry, Kyungpook National University, Daegu 41940, Korea
Jaeil Kim: School of Computer Science and Engineering, Kyungpook National University, Daegu 41940, Korea
Youn-Hee Choi: Institute for Translational Research in Dentistry, Kyungpook National University, Daegu 41940, Korea
Du-Hyeong Lee: Institute for Translational Research in Dentistry, Kyungpook National University, Daegu 41940, Korea

IJERPH, 2020, vol. 18, issue 1, 1-15

Abstract: The use of three-dimensional face-scanning systems to obtain facial models is of increasing interest, however, systematic assessments of the reliability of portable face-scan devices have not been widely conducted. Therefore, a systematic review and meta-analysis were performed considering the accuracy of facial models obtained by portable face-scanners in comparison with that of those obtained by stationary face-scanning systems. A systematic literature search was conducted in electronic databases following the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines for articles published from 1 January 2009 to 18 March 2020. A total of 2806 articles were identified, with 21 articles available for the narrative review and nine studies available for meta-analysis. The meta-analysis revealed that the accuracy of the digital face models generated by the portable scanners was not significantly different from that of the stationary face-scanning systems (standard mean difference (95% confidence interval) = −0.325 mm (−1.186 to 0.536); z = −0.74; p = 0.459). Within the comparison of the portable systems, no statistically significant difference was found concerning the accuracy of the facial models among scanning methods ( p = 0.063). Overall, portable face-scan devices can be considered reliable for obtaining facial models. However, caution is needed when applying face-scanners with respect to scanning device settings, control of involuntary facial movements, landmark and facial region identifications, and scanning protocols.

Keywords: accuracy; three-dimensional face model; portable facial scanning; systematic review; meta-analysis (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2020
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