A new method of limb motion automatic analysis system in rat is developed.The system is composed of general video devices and personal computer hardware

based on techniques of motion capture using color marker.The digital image processing such as fast color space conversion

fast color segmentation

and so on

are employed to identify the color markers

extracting features of kinematics parameters are applied in classification and identification of gait phase.The average processing time is less than 10 ms per frame

and the accuracy of recognition is 97 %.Experiment results have shown that this automatic analysis system is simple

real-time and valid.