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This work also suggests that it is more appropriate to use the tangent of the hip rotation angle as a gait signature rather 
than the hip rotation angle. This eliminates all requirements for the gait angle to be small and simplifies the correction 
to just shifting and scaling, which can be derived from the data and need not be known a-priori. 
$8 ACKNOWLEDGEMENTS 
The authors would like to thank Mrs. Joy Carter for her contribution to this work, walking tirelessly in front of the 
camera, and subsequently allowing her picture to appear in print and on the Internet. 
9 REFERENCES 
1. A. K. Jain, R. Bolle and S. Pankanti Eds., Biometrics: Personal Identification in Networked Society, Kluwer 
Academic Publishing, 1998 
2. M. S. Nixon, J. N. Carter, D. Cunado, P. S. Huang and S. V. Stevenage, Automatic Gait Recognition, In: A. K. Jain, 
R. Bolle and S. Pankanti Eds.: Biometrics: Personal Identification in Networked Society, pp. 231-250, Kluwer 
Academic Publishing, 1998 
3. M. P. Murray, Gait as a total pattern of movement, American Journal of Physical Medicine, 46(1), pp. 290-332, 
1967 
4. P. S. Huang, C. J. Harris and M. S. Nixon, Recognizing Humans by Gait via Parametric Canonical Space, Journal of 
Artificial Intelligence in Engineering, 13, p.359-366, 1999 
5. P. S. Huang, C. J. Harris and M. S. Nixon, Human Gait Recognition in Canonical Space using Temporal Templates, 
IEE Proceedings Vision Image and Signal Processing, 146(2), pp. 93-100, 1999 
6. D. Cunado, M. S. Nixon and J. N. Carter, Using Gait as a Biometric, via Phase-Weighted Magnitude Spectra, In: J Bigun, 
G. Chollet and G. Borgefors Eds.: Lecture Notes in Computer Science, 1206 (Proceedings of Ist Int. Conf. on Audio- and 
Video-Based Biometric Person Authentication AVBPA97), pp 95-102, 1997 
7. D. Cunado, M. S. Nixon and J. N. Carter, Automatic Gait Recognition via Model-Based Evidence Gathering, Proc 
Proceedings AutoID '99: IEEE Workshop on Identification Advanced Technologies p.27-30, 1999 
  
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