画像処理を用いた魚道用の魚カウンタに関する技術課題の検討

概要

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Various fish-ladders have been constructed to enable fishes such as salmon, iwana mountain trout etc. to ascend upstream in rivers. The effectiveness of such fish-ladders, however, has not been evaluated sufficiently since there is no effective and efficient way to count the number of fishes which pass the fish-ladder. A study on fish-counting was carried out at the advanced course in Hakodate National College of Technology. The challenge employed image processing technique to count the number of fishes and to determine the kind of fish, which goes up through the fish-ladder. This paper describes the method to count and to determine the kind of fish by image processing, and shows the results of experiments carried out in the laboratory and in the mockup of fish-ladder set up in the field. We point out technical issues to develop the fish counting system.