足圧分布画像を用いた足部アーチ分類手法の提案と検証

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  • Proposal and Verification of a Foot Arch Classification Technique using Foot Pressure Distribution Images
  • ソクアツ ブンプ ガゾウ オ モチイタ ソクブ アーチ ブンルイ シュホウ ノ テイアン ト ケンショウ

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The shape of our feet is important for our good health. If the feet are an abnormal shape, such as ‘high arch' and ‘flat foot', it may adversely affect the performance of walking and maintaining the posture, and damage our health. Therefore, we want to develop a system that allows even non-expert users to measure the shape of their feet and make a diagnosis. Our system takes the image of pressure distribution of feet as an input, and classifies it into four categories: ‘normal', ‘high arch', ‘flat foot', and ‘suspected of an abnormal shape'. We build our classifier using the Adaboost algorithm and decision tree algorithm. Our training data consists of 200 images of pressure distribution of feet that are labeled by the experts in advance. We use the pressure and area information obtained from each input image as the image features. We conduct the verification based on the cross validation on our training data. The resulting accuracy that our classifier achieves is 95.5%. The recalls of the four categories of ‘high arch', ‘normal', ‘flat foot', and ‘suspected of an abnormal shape' are 100%, 94.2%, 96.3%, and 95.8%, which are best performance compared with the previous methods.

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