References
- KOUCHI , M. 1995 . An analysis of foot shape variation based on the medial axis of foot outline . Ergonomics , 38 : 1911 – 1920 .
- KUBO , F. 1988 . A convex hull algorithm for shape analysis on the digital image . Transact ions of the Institute of Electronics, Information and Communication Engineers (Japan) , J71-D : 1873 – 1875 .
- ROSENFELD , A. and KAK , A. C. 1982 . Digital Picture Processing , 2nd edn , New York : Academic Press .