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[1] Jiang Ming, He Xiaoyuan,. Fish maneuver analysis system based on sequence images [J]. Journal of Southeast University (English Edition), 2009, 25 (2): 228-231. [doi:10.3969/j.issn.1003-7985.2009.02.018]
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Fish maneuver analysis system based on sequence images()
基于序列图像的鱼类机动性分析系统
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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:
25
Issue:
2009 2
Page:
228-231
Research Field:
Biological Science and Medical Engineering
Publishing date:
2009-06-30

Info

Title:
Fish maneuver analysis system based on sequence images
基于序列图像的鱼类机动性分析系统
Author(s):
Jiang Ming1;  2;  He Xiaoyuan1
1 School of Civil Engineering, Southeast University, Nanjing 210096, China
2 School of Civil Engineering, University of Science and Technology of Suzhou, Suzhou 215011, China
蒋明1;  2;  何小元1
1东南大学土木工程学院, 南京 210096; 2苏州科技学院土木工程学院, 苏州 215011
Keywords:
carp;  maneuver;  kinematics;  digital image;  correlation
鲤鱼;  机动性;  运动学;  数字图像;  相关
PACS:
Q66
DOI:
10.3969/j.issn.1003-7985.2009.02.018
Abstract:
The aim is to establish an automatic system to analyze the maneuver performance of fish.A high speed camera(1 000 frame/s)is employed to record fast-start maneuver.Three steps are taken to analyze the kinematics:first, the midline in the first image is partitioned into equal interval lengths and the coordinates of all inter segmental points are saved.Secondly, these points coordinates are searched in the next frame with the digital image correlation(DIC)method, then these points are fitted with a spline curve function.Repeat this step until all the midlines are figured out frame by frame.Finally, according to the variety of midlines, the kinematics of the fast-start is calculated.Using this system to test carp C-start, the duration is divided into two stages:stage 1 is defined as the formation of the C shape and stage 2 as the return flip of the tail followed with forward motion.By tracing the middle line, the kinematic parameters of turning rate, centre of mass(CM)turning rate, CM turning radius, etc.are obtained.
为了建立一个研究鱼类机动性的自动化分析系统, 使用高速摄像机(1 000 frame/s)记录了鱼的快速起动过程, 并进行动力学分析.首先确定并等分第1帧图中鱼的中轴线, 保存等分点坐标;然后运用图像相关在下一帧图中找出第1帧图中的所有等分点, 并用样条函数拟合这些等分点, 得到鱼的中轴线, 重复这一步骤, 获得序列图像中鱼的中轴线;最后根据中轴线随时间的变化分析计算鱼在起动过程中的运动特性.运用此系统, 测试了鲤鱼的C 形起动过程, 鲤鱼C 形起动分为2个阶段:第1阶段, 整个身体弯曲成C形;第2阶段, 尾鳍做大幅度反向摆动, 然后鲤鱼做直线运动.通过对各个阶段鱼体中轴线的跟踪, 获得了鲤鱼C 形起动的转动角速度、质心转速和质心转动半径等运动学参数.

References:

[1] Webb P W.Fast-start performance and body form in seven species of teleost fish [J].The Journal of Experimental Biology, 1978, 74:211-226.
[2] Domenici P, Blake R W.The kinematics and performance of fish fast-start swimming [J].The Journal of Experimental Biology, 1997, 200:1165-1178.
[3] Domenici P, Standen E M, Levine R P.Escape maneuvers in the spiny dogfish [J].The Journal of Experimental Biology, 2004, 207:2339-2349.
[4] Jing J, Yin X Z, Lu X Y.Observation and hydrodynamic analysis on fast-start of yellow catfish [J].Progress in Natural Science, 2005, 15(1):34-40.
[5] Wu Y F, Jia L B, Yin X Z.The kinematic analysis of s-start of zebra danio[J].Journal of Experimental Mechanics, 2007, 22(5):519-526.(in Chinese)
[6] Pan B, Xie H M, Wang Z Y, et al.Study on subset size selection in digital image correlation for speckle patterns[J].Optics Express, 2008, 16(10):7037-7048.
[7] Pan B, Xie H M, Xu B Q, et al.Performance of sub-pixel registration algorithms in digital image correlation [J].Measurement Science and Technology, 2006, 17(6):1615-1621.

Memo

Memo:
Biographies: Jiang Ming(1961—), female, graduate, associate professor;He Xiaoyuan(corresponding author), male, doctor, professor, mmhxy@seu.edu.cn.
Foundation item: The National Natural Science Foundation of China(No.10872139).
Citation: Jiang Ming, He Xiaoyuan.Fish maneuver analysis system based on sequence images[J].Journal of Southeast University(English Edition), 2009, 25(2):228-231.
Last Update: 2009-06-20