Discussion on a method to extract scallop using line convergence index filter from granule-sand seabed videos

The results of fishery investigations are used to estimate the catch size, times fish are caught, and future stocks in the fish culture industry. In Tokoro, Japan, scallop farms are located on gravel, sand, and granule-sand seabed. Seabed videos are necessary to visually estimate the number of scallops of a particular farm. However, there is no automatic technology for measuring resources quantities and so the current investigation technique is the manual measurement by experts. In granule-sand fields, we can see only the shelly rim because the scallop is covered with sand and opens and closes its shell while it is alive and breathing. We propose a method to extract scallop areas using the line convergence index filter from videos of granule-sand seabed, explain the results, and evaluate the method´s effectiveness.