Modification and refinement of three-dimensional reconstruction to estimate body volume from a simulated single-camera image

Chuang-Yuan Chiu*, Marcus Dunn, Ben Heller, Sarah M. Churchill, Tom Maden-Wilkinson

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)
13 Downloads (Pure)

Abstract

Objective: Body volumes (BV) are used for calculating body composition to perform obesity assessments. Conventional BV estimation techniques, such as underwater weighing, can be difficult to apply. Advanced machine learning techniques enable multiple obesity-related body measurements to be obtained using a single-camera image; however, the accuracy of BV calculated using these techniques is unknown. This study aims to adapt and evaluate a machine learning technique, synthetic training for real accurate pose and shape (STRAPS), to estimate BV. Methods: The machine learning technique, STRAPS, was applied to generate three-dimensional (3D) models from simulated two-dimensional (2D) images; these 3D models were then scaled with body stature and BV were estimated using regression models corrected for body mass. A commercial 3D scan dataset with a wide range of participants (n = 4318) was used to compare reference and estimated BV data. Results: The developed methods estimated BV with small relative standard errors of estimation (<7%) although performance varied when applied to different groups. The BV estimated for people with body mass index (BMI) < 30 kg/m2 (1.9% for males and 1.8% for females) were more accurate than for people with BMI ≥ 30 kg/m2 (6.9% for males and 2.4% for females). Conclusions: The developed method can be used for females and males with BMI < 30 kg/m2 in BV estimation and could be used for obesity assessments at home or clinic settings.

Original languageEnglish
Pages (from-to)103-111
Number of pages9
JournalObesity Science and Practice
Volume9
Issue number2
Early online date10 Jun 2022
DOIs
Publication statusPublished - Apr 2023

Keywords

  • body composition
  • body image
  • computer vision
  • machine learning
  • monitoring
  • obesity

ASJC Scopus subject areas

  • Endocrinology, Diabetes and Metabolism
  • Nutrition and Dietetics

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