A digital stereo-video camera system for three-dimensional monitoring of free-swimming Pacific bluefin tuna,

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Éditeur(s) EDP Sciences
Identifiant documentaire 10-dkey/10.1051/alr/2011133
Identifiant OAI oai:edpsciences.org:dkey/10.1051/alr/2011133
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Auteur(s): Shinsuke Torisawa,Minoru Kadota,Kazuyoshi Komeyama,Katsuya Suzuki,Tsutomu Takagi
Mots clés Three-dimensional monitoring Pacific bluefin tuna Stereo-camera Aquaculture Direct linear transformation (DLT) method
Date de publication 05/08/2011
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Source https://doi.org/10.1051/alr/2011133
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We used a digital stereo-video camera system for three-dimensional monitoring of cultured Pacific bluefin tuna, Thunnus orientalis, swimming freely in a net cage. We estimated the fork length and length frequency distribution of individual fish using the direct linear transformation (DLT) method. Information obtained from stereo images is useful for managing the growth of tuna during rearing. Our aim was to develop a simple method involving a combination of DLT and commercial image-processing software to enable aquaculturists to obtain three-dimensional measurements of fish. In this study, we used a stereo-video camera system to evaluate the precision and validity of fish size estimates determined from repeated measurements. Of the total assessed individuals swimming within a distance of  
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