Accuracy and Reliability of Kinect Motion Sensing Input Device’s 3D Models: A Comparison to Direct Anthropometry and 2D Photogrammetry


  • Ahmed Mangoud Badr Department of Orthodontics, Faculty of Dentistry, Aswan University, Tingar, Egypt
  • Wael M. Mubarak Refai Department of Orthodontics, Faculty of Dentistry, Minia University, Dean of Faculty of Dentistry, Aswan University, Tingar, Egypt
  • Mohamed Gaber El-Shal Department of Orthodontics, Faculty of Dentistry, Minia University, Minya, Egypt
  • Ahmed Nasef Abdelhameed Department of Orthodontics, Faculty of Dentistry, Minia University, Minya, Egypt



Direct anthropometry, Three-dimensional Models, Photogrammetry, Motion sensing input device, Kinect


AIM: This study aims to evaluate the accuracy and reliability of Kinect motion sensing input device’s three-dimensional (3D) models by comparing it with direct anthropometry and digital 2D photogrammetry.

MATERIALS AND METHODS: Six profiles and four frontal parameters were directly measured on the faces of 80 participants. The same measurements were repeated using two-dimensional (2D) photogrammetry and (3D) images obtained from Kinect device. Another observer made the same measurements for 30% of the images obtained with 3D technique, and interobserver reproducibility was evaluated for 3D images. Intraobserver reproducibility was evaluated. Statistical analysis was conducted using the paired samples t-test, interclass correlation coefficient, and Bland-Altman limits of agreement.

RESULTS: The highest mean difference was 0.0084 mm between direct measurement and photogrammetry, 0.027 mm between direct measurement and 3D Kinect’s models, and 0.018 mm between photogrammetry and 3D Kinect’s. The lowest agreement value was 0.016 in the all parameter between the photogrammetry and 3D Kinect’s methods. Agreement between the two observers varied from 0.999 Sn-Me to 1 with the rest of linear measurements.

CONCLUSION: Measurements done using 3D Images obtained from Kinect device indicate that it may be an accurate and reliable imaging method for use in orthodontics. It also provides an easy low-cost 3D imaging technique that has become increasingly popular in clinical settings, offering advantages for surgical planning and outcome evaluation.


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How to Cite

Badr AM, Refai WMM, El-Shal MG, Abdelhameed AN. Accuracy and Reliability of Kinect Motion Sensing Input Device’s 3D Models: A Comparison to Direct Anthropometry and 2D Photogrammetry. Open Access Maced J Med Sci [Internet]. 2021 May 14 [cited 2021 Dec. 4];9(D):54-60. Available from: