An investigation of the 3-dimensional surface capturetechniques of the human foot

3D surface model of the human foot has become widely used for numerous clinical applications which include orthopaedics, orthotics and sports medicine among many other disciplines. Currently, a number of electronic sensors such as MRI scanners, CT scanners, and laser scanning devices are available for static 3D dorsal surface capture. In general, these techniques are not capable of capturing accurate digital 3D surfaces of the dorsal surface during gait. Therefore, a number of scientific studies have adopted advanced photogrammetric approaches in order to obtain accurate 3D surface models of human feet during gait. The main objective of this paper is to evaluate the suitability of optical video imaging systems and photogrammetric techniques for obtaining dynamic surface contours of the foot. The evaluation is based on the current published results plus the trial results obtained by the authors. Based on the results of this investigation, it is concluded that the close range photogrammetric techniques are the most accurate methods for generation of precise 3D models of the human foot during gait.

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