In biomechanics, the ability to manipulate the video data of the desired human motion using computer vision is as important as obtaining the numerical solutions from mathematical modeling. This paper covers both of these requirements equally. The proposed model presents the concept of data digitizing of recorded video films of free in vivo oscillation of human lower limb. The analysis is carried out using an interactive Graphical User Interface (GUI) object oriented analyzing software.

Computer analysis is based on the calculation and graphic representation of kinematic parameters (velocity, acceleration, angular velocity etc.) by manual selection of the attached markers from computer monitor using a pointing device (mouse, light-pen etc.).

The main tool we use to conduct the research is object oriented video motion analysis software (written by Delphi^TM 2.0). The mathematical model developed for the analysis of the free in vivo oscillations of human leg is also utilized. In this research work, video and analysis software is used to study motion both qualitatively and quantitatively. The numerical results of the mathematical model are used to obtain desired constants of the motion 'by comparing with the ones obtained from the digitized data of the experimental analysis. Using these tools together allows us to get a comprehensive understanding of the free motion of the human lower limb.

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