Abstract:

Considering that the trajectory and the stance of frog jump movement are the basis of the research on the biological jumping mechanism of biomimetic robot design, a new method of trajectory extraction from animal’s movement is presented. With the help of the proposal, views from both sides or from the top of the frog moving can be captured simultaneously. And the 3D information was obtained after the correction for the perspective effect and the reduction of error produced by coefficient. To overcome the shortcoming of large amount of calculation, a program is designed to deal with the video images. And finally the curve of the position, the velocity and the acceleration of each point and the angle of each joint of frog are exported. The results of experiment and analysis show that the new method could be employed to develop and control a jumping robot.

Key words: movement trajectory extraction, perspective effect correction, extraction program, jumping frog