Application of CCD image scanning to sea-cage motion response analysis

Based on the CCD image technique, a method for analyzing the motion responses of moving objects is proposed. This method is composed of four steps: (1) image collection via a CCD camera; (2) image scanning for tracing points; (3) coordinate transformation; (4) data analysis. The validity of the meth...

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Published inAquacultural engineering Vol. 35; no. 2; pp. 179 - 190
Main Authors Gui, Fukun, Li, Yucheng, Dong, Guohai, Guan, Changtao
Format Journal Article
LanguageEnglish
Published Amsterdam Elsevier B.V 01.08.2006
Elsevier Science
Subjects
Animal aquaculture
Animal productions
Biological and medical sciences
Cage motion responses
cameras
CCD
Coordinates transformation
fish cages
Fundamental and applied biological sciences. Psychology
General aspects
hydrodynamics
image analysis
image processors
Image scanning
mariculture
Marine
water currents
CCD
Image scanning
Cage motion responses
Coordinates transformation
Motion
Transformation
Cage
Image
Aquaculture
Environmental engineering
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Summary:Based on the CCD image technique, a method for analyzing the motion responses of moving objects is proposed. This method is composed of four steps: (1) image collection via a CCD camera; (2) image scanning for tracing points; (3) coordinate transformation; (4) data analysis. The validity of the method was verified through a specific experiment. To realize automation, the technique was integrated into our software and successfully applied to the analysis of the motion responses in sea-cage model tests. Experimental results show that the horizontal maximum velocities of the floating cage system under different wave conditions are much smaller than those of the wave particles. On the other hand, the vertical maximum velocities, under the same conditions, are greater than those of wave particles. Furthermore, the results reveal that waves have a relatively small effect on net deformation in the gravity cage. Nevertheless, the cage suffers from severe volume loss under current conditions, even using a heavy weight system. The CCD image technique, proposed here, is a reliable and efficient approach for the study of motion responses of moving objects, such as ships and sea cages.
Bibliography:http://dx.doi.org/10.1016/j.aquaeng.2006.01.003
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ISSN:0144-8609
1873-5614
DOI:10.1016/j.aquaeng.2006.01.003