An exploratory study of dynamic foot shape measurements with 4D scanning system

Zhang, Liying; Yick, Kit Lun; Yue, Ming; Yip, Joanne; Ng, Sun Pui

doi:10.1038/s41598-023-35822-0

Cited by 2 publications

(1 citation statement)

References 62 publications

(78 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…4D scanning systems have been used in ergonomic and anthropometry research to investigate shape changes and deformation patterns during various activities. While the foot [ 19 , 20 , 25 , 26 ] and face [ 21 ] have received more attention, there is a growing interest in applying 4D scanning technology to analyze body and breast dynamics [ 22 – 24 ]. Although only a limited number of studies have explored this area, it has been recognized as having great potential for ergonomics studies and sportswear design [ 18 ].…”

Section: Related Workmentioning

confidence: 99%

Ultra-dense Motion Capture: An exploratory full-automatic approach for dense tracking of breast motion in 4D

Liu,

Yick,

Sun

et al. 2024

PLoS ONE

Self Cite

View full text Add to dashboard Cite

Understanding the dynamic deformation pattern and biomechanical properties of breasts is crucial in various fields, including designing ergonomic bras and customized prostheses, as well as in clinical practice. Previous studies have recorded and analyzed the dynamic behaviors of the breast surface using 4D scanning, which provides a sequence of 3D meshes during movement with high spatial and temporal resolutions. However, these studies are limited by the lack of robust and automated data processing methods which result in limited data coverage or error-prone analysis results. To address this issue, we identify revealing inter-frame dense correspondence as the core challenge towards conducting reliable and consistent analysis of the 4D scanning data. We proposed a fully-automatic approach named Ulta-dense Motion Capture (UdMC) using Thin-plate Spline (TPS) to augment the sparse landmarks recorded via motion capture (MoCap) as initial dense correspondence and then rectified it with a sophisticated post-alignment scheme. Two downstream tasks are demonstrated to validate its applicability: virtual landmark tracking and deformation intensity analysis. For evaluation, a dynamic 4D human breast anthropometric dataset DynaBreastLite was constructed. The results show that our approach can robustly capture the dynamic deformation characteristics of the breast surfaces, significantly outperforms baselines adapted from previous works in terms of accuracy, consistency, and efficiency. For 10 fps dataset, average error of 0.25 cm on control-landmarks and 0.33 cm on non-control (arbitrary) landmarks were achieved, with 17-70 times faster computation time. Evaluation was also carried out on 60 fps and 120 fps datasets, with consistent and large performance gaining being observed. The proposed method may contribute to advancing research in breast anthropometry, biomechanics, and ergonomics by enabling more accurate tracking of the breast surface deformation patterns and dynamic characteristics.

show abstract

Section: Related Workmentioning

confidence: 99%

Ultra-dense Motion Capture: An exploratory full-automatic approach for dense tracking of breast motion in 4D

Liu,

Yick,

Sun

et al. 2024

PLoS ONE

Self Cite

View full text Add to dashboard Cite

show abstract

Effects of 10 KM run on foot morphology and bilateral symmetry in male recreational runners

Mo,

Lu,

et al. 2024

Front. Bioeng. Biotechnol.

View full text Add to dashboard Cite

Foot morphology and arch integrity do not remain constant during a running bout. Previous studies have reported inconsistent changes in foot sizes and arch parameters and this discrepancy may be related to the variation in their test duration, e.g., 15-min treadmill run vs. 30 KM trial. Hence, this study sought to evaluate the change in foot morphology, arch integrity and bilateral symmetry after a 10 KM run among 19 male recreational runners. Before and after the run, a portable foot scanner was used to capture the 3-dimensional foot images and measure foot dimensions in both weight-bearing and non-weight-bearing conditions. Foot arch integrity was quantified by arch height ratio, arch height index, and arch stiffness index (ASI). Bilateral symmetry was evaluated by calculating the symmetry index. Increased foot length (p = 0.007; ηp2 = 0.18) and decreased ball girth (p = 0.038; ηp2 = 0.11) were demonstrated following the run with absolute differences of less than 2 mm. Navicular height, dorsum height, arch height ratio and arch height index significantly decreased after the run (p < 0.001; ηp2 ≥0.30) whereas ASI increased (p < 0.001, ηp2 = 0.33) and navicular height drop reduced (p < 0.001, ηp2 = 0.37). Significances of symmetry index were only demonstrated for navicular height (p = 0.019, effect size = 0.37) and arch height ratio (p = 0.019, effect size = 0.42). A few changes in foot morphology were detected but a reduction in foot arch height was demonstrated, which may give shoe manufacturers insights into shoe design. Male recreational runners were recommended to choose shoes with arch support for maintaining foot arch function during a 10 KM run.

show abstract

An exploratory study of dynamic foot shape measurements with 4D scanning system

Cited by 2 publications

References 62 publications

Ultra-dense Motion Capture: An exploratory full-automatic approach for dense tracking of breast motion in 4D

Ultra-dense Motion Capture: An exploratory full-automatic approach for dense tracking of breast motion in 4D

Effects of 10 KM run on foot morphology and bilateral symmetry in male recreational runners

Contact Info

Product

Resources

About