7 April 2008 Development and application of 3-D foot-shape measurement system under different loads
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Abstract
The 3-D foot-shape measurement system under different loads based on laser-line-scanning principle was designed and the model of the measurement system was developed. 3-D foot-shape measurements without blind areas under different loads and the automatic extraction of foot-parameter are achieved with the system. A global calibration method for CCD cameras using a one-axis motion unit in the measurement system and the specialized calibration kits is presented. Errors caused by the nonlinearity of CCD cameras and other devices and caused by the installation of the one axis motion platform, the laser plane and the toughened glass plane can be eliminated by using the nonlinear coordinate mapping function and the Powell optimized method in calibration. Foot measurements under different loads for 170 participants were conducted and the statistic foot parameter measurement results for male and female participants under non-weight condition and changes of foot parameters under half-body-weight condition, full-body-weight condition and over-body-weight condition compared with non-weight condition are presented. 3-D foot-shape measurement under different loads makes it possible to realize custom-made shoe-making and shows great prosperity in shoe design, foot orthopaedic treatment, shoe size standardization, and establishment of a feet database for consumers and athletes.
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Guozhong Liu, Boxiong Wang, Hui Shi, Xiuzhi Luo, "Development and application of 3-D foot-shape measurement system under different loads", Proc. SPIE 6933, Smart Sensor Phenomena, Technology, Networks, and Systems 2008, 693319 (7 April 2008); doi: 10.1117/12.775987; https://doi.org/10.1117/12.775987
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