Abstract
The aim of present study is to establish an automatic system to analysis the maneuvers of fast-start performance in fishes. Fast-starts are brief, sudden accelerations used by fish during predator-prey encounters. We employ frame-by-frame analysis of high speed camera (1000Hz) to quantify midline kinematics during fast-start maneuver. This system includes three steps: First, partitioned the midline into equal interval lengths and decided the intersegmental points in the front image. Second, find out these points in next image using digital image correlation (DIC) and using a spline based curve fitting technique to fit the data above. All the midlines were figured out frame by frame. Third, calculating the kinematics based on the midlines of fish mentioned above. Using this system in carp we have obtained the performance of turning rate, CM (centre of mass) turning rate, CM turning radius etc. The results show this system can obtain more accurate kinematics data.
