Photographic measurement for obtaining the length, aspect and bearing of free-swimming fish from their spatial position.

スポンサーリンク

概要

• 論文の詳細を見る

• A method was designed for measuring the spatial position of an arbitrary point in the field of view of an underwater stereo camera system. The distance between camera lens and fish, the size of fish, the aspect angle of fish in the field of view of the camera, and the bearing angle of fish relative to the camera optical axis can be calculated with high accuracy by using this method.In the future, by use of a combination system of the stereo camera system and an echo sounder, it will be possible to obtain the echo level of fish in the sound beam and the above information derived from the simultaneous stereo photographs. Thus, it is expected that accurate estimation of the in situ acoustic target strength of fish will be possible.

• 社団法人 日本水産学会の論文

著者

• ロン レバン

  東京大学海洋研究所

• 青山 恒雄

  東京大学海洋研究所

関連論文

• ステレオ画像による魚の空間位置計測の一方法〔英文〕
• 写真及び音響的技法による魚の音響反射強度計測〔英文〕
• 現場計測によるさくらえびひき網の網成りの解析
• イカナゴ仔魚の日周鉛直移動と摂餌リズム〔英文〕
• 三陸大槌湾における稚仔魚の出現と分布特性〔英文〕
• 飼育実験により測定したParathemisto japonica(端脚目)のイカナゴ仔魚捕食能力〔英文〕
• 模型網実験によるさくらえびひき網の網成り解析
• Photographic measurement for obtaining the length, aspect and bearing of free-swimming fish from their spatial position.

スポンサーリンク