4D Scanning - Dynamic View on Body Measurements

Abstract

Fitting test in movement are an important issue not only in work and sports wear since garment should not restrict the range of motion. Therefore, dynamic anthropometry is a major research topic. Until now, only static position could be captured. Still, it is not known how body geometry changes in dynamic movement. In IGF project “Mobilityrestrictions” photogrammetry scanner “Little Alice” was investigated regarding 4D. It enables serial recording in seconds. The aim of the research project was beside other to identify differences between static and dynamic body measurements.

Scanner “Little Alice” has never been utilized for body form analysis. Therefore, a basic research was performed. Several parameters were examined by iterative tests before scan procedure was defined. Three work or sport related movements were defined and compared to standard position: Biceps curl, leg flex and squat. The changes in scan surface were investigated by a three-step analysis: body measurements, cross sections and a 3D analysis. Scan procedure was performed by six test subjects German sizes 50 and 58, age group 25 – 55 years.

The results show that photogrammetry can be utilized to investigate body geometry changes due to movement. Body surface deviations have been investigated. Thus, not in all cases there were differences between static and dynamic scans. Yet, body geometry alters. 4D scanning enables comprehensive analysis of body geometry changes due to movement. Body measurement and surface alterations can be visualized and quantified. Scans of motions may be used to validate 3D simulation avatars.