22
M. Tiwari and N. Anand
This established the fact that the scanner though being very consistent with
scanned measurement reporting may have a systematic error that can be statistically corrected. One such method for correcting the difference between scanner
reported measurement and manual measurement is Bias shift method as proposed in
this paper.
4 Results and Discussion
It was observed that the Sizestream SS14 scanners used in the validation exercise
were highly consistent in taking human body measurements, however, it indicated a
systematic error throughout the process which lead to failure of all the measurements
in terms of accuracy levels (as per ISO 8559:1989 and ISO 20685:2005) achieved
against manual measurements used as the gold standards. Subsequently, a correction
factor in the form of bias-shift was determined, and the same was incorporated into the
scanner extracted measurements and scanner measurement accuracy was achieved.
5 Conclusion and Future Scope
This research paper explains the detailed methodology followed to establish the
accuracy and reliability of the Sizestream 3D full-body scanning system. It also
describes the statistical procedure to confirm the measurement consistency of the
scanners. The scanner high level of consistency (with-in and between) confirmed
the behavior of systematic error across all the SS 14 body scanners used in the
study. As the scanners were highly consistent, the same correction factor (in form
of Bias-shift) may be applied to all other SS 14 body scanners. The application
of bias-shift (as a correction factor) confirmed the scanner measurements within
the permissible error limits of ISO 20685:2005 and ISO 8559:1989. The 3D scanner
validation methodology discussed in this paper may be applied successfully in future
researches related to 3D scanning recommended to conduct sizing surveys.
Acknowledgements The authors are thankful to Prof. Vandana Narang, Prof. Suhail Anwar, Prof.
Monika Gupta, and Prof. S.S. Ray of National Institute of Fashion Technology, India for their
technical inputs to carry out this research. We are also highly thankful to the participants for their
volunteer contribution as subjects for 3D scanning in this study.
References
1. Mckinnon L, Istook C (2001) Comparative analysis of the image twin system and the 3T6 body
scanner. J Text Apparel Technol Manag 1(2)
M. Tiwari and N. Anand
This established the fact that the scanner though being very consistent with
scanned measurement reporting may have a systematic error that can be statistically corrected. One such method for correcting the difference between scanner
reported measurement and manual measurement is Bias shift method as proposed in
this paper.
4 Results and Discussion
It was observed that the Sizestream SS14 scanners used in the validation exercise
were highly consistent in taking human body measurements, however, it indicated a
systematic error throughout the process which lead to failure of all the measurements
in terms of accuracy levels (as per ISO 8559:1989 and ISO 20685:2005) achieved
against manual measurements used as the gold standards. Subsequently, a correction
factor in the form of bias-shift was determined, and the same was incorporated into the
scanner extracted measurements and scanner measurement accuracy was achieved.
5 Conclusion and Future Scope
This research paper explains the detailed methodology followed to establish the
accuracy and reliability of the Sizestream 3D full-body scanning system. It also
describes the statistical procedure to confirm the measurement consistency of the
scanners. The scanner high level of consistency (with-in and between) confirmed
the behavior of systematic error across all the SS 14 body scanners used in the
study. As the scanners were highly consistent, the same correction factor (in form
of Bias-shift) may be applied to all other SS 14 body scanners. The application
of bias-shift (as a correction factor) confirmed the scanner measurements within
the permissible error limits of ISO 20685:2005 and ISO 8559:1989. The 3D scanner
validation methodology discussed in this paper may be applied successfully in future
researches related to 3D scanning recommended to conduct sizing surveys.
Acknowledgements The authors are thankful to Prof. Vandana Narang, Prof. Suhail Anwar, Prof.
Monika Gupta, and Prof. S.S. Ray of National Institute of Fashion Technology, India for their
technical inputs to carry out this research. We are also highly thankful to the participants for their
volunteer contribution as subjects for 3D scanning in this study.
References
1. Mckinnon L, Istook C (2001) Comparative analysis of the image twin system and the 3T6 body
scanner. J Text Apparel Technol Manag 1(2)