Accurate fish position and orientation parameters correlated to wideband echo: A new approach for classification of fish species

This work deals with the correlation between high accurate geometric parameters of a free-swimming fish in a tank, obtained by image processing, with the associated 20–140 kHz wideband sonar echo acquired simultaneously. Variations in terms of Target Strength and normalized spectral energy are studied for three species of fish, perch, roach and char, according to different geometric parameters. Classification of the three species is implemented.