Toward automatic detection of deep sea top predators by visible light

In this paper, we propose an automatic shark detection method in deep sea by light section method, in order to realize shark observation with much less energy. This method detects sharks on the basis of cross-sectional shape obtained by light section method. To analyze the performance of the proposed method, experiments at aquariums was conducted. It was observed that detection accuracy became high by setting thresholds considering physical characteristics of shark. Future work includes additional sampling and sea trial.