Paper A12.139

M. Kouchi et al., "A Protocol for Evaluating the Accuracy of 3D Body Scanners - Landmark Locations and Surface Shape", in Proc. of 1st Asian Workshop on 3D Body Scanning Technologies, Tokyo, Japan, 2012, pp. 139-146, http://dx.doi.org/10.15221/A12.139.

Title:

A Protocol for Evaluating the Accuracy of 3D Body Scanners - Landmark Locations and Surface Shape

Authors:

Makiko KOUCHI 1, Masaaki MOCHIMARU 1, Bruce BRADTMILLER 2, Hein DAANEN 3, Peng LI 4, Beatriz NACHER 5, Yunja NAM 6

1 Digital Human Research Center, AIST, Tokyo, Japan;
2 Anthrotec Inc., Yellow Springs (OH), USA;
3 TNO, Soesterberg, The Netherlands;
4 US Army, Natick (MA), USA;
5 IBV, Valencia, Spain;
6 Seoul National University, Seoul, Korea

Abstract:

We propose a protocol for evaluating the accuracy of scan-derived surface shape and the repeatability of scan-derived landmark locations. Following existing Japanese and German domestic standards, we propose to use a calibrated artefact (e.g. a sphere about 120mm in diameter) for evaluating the accuracy of surface shape. To evaluate the repeatability of landmark locations, we propose to use an anthropomorphic dummy with premarked landmark locations. The test objects are measured by the 3D body scanner to be evaluated, and evaluation parameters are calculated from the measured data. A round-robin test was conducted in six different institutes using 19 body/head/foot scanners produced by 10 companies/institutes. The purposes of the round-robin test were to evaluate whether the test objects could be scanned by different body scanners, to evaluate various scan locations for the test objects within the scanning volume, and to examine the quality parameters to be reported. As a result, the proposed test objects could be measured and the data exported by all systems except one, which did not export the ball measurement. Quality parameters are useful for quantifying the accuracy of scan-derived surface shape and repeatability of landmark locations, and providing a basis for the agreement between anthropometric data providers and data users. Since required accuracy depends on applications, it is important to examine results from different scan locations to evaluate the quality of scan-derived measurements rather than considering only the worst case.

Keywords:

scan-derived measurement, landmark location, repeatability, accuracy, evaluation protocol

Details:

Full paper: A12.139.pdf
Proceedings: 3DBST A2012, 17-18 Apr. 2012, Tokyo, Japan
Pages: 139-146
DOI: http://dx.doi.org/10.15221/A12.139

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