The amount of Alaria praelonga Kjellmans analysis method from laminaria bed images for fishery investigation

The purpose of this research is to develop automated system for measuring the amount of target fishery resources from images which are taken with underwater camera for fishery investigation in laminaria beds in Nemuro, Japan. The image analysis technology for measuring the amount of target in laminaria beds in Nemuro is needed to develop it. In laminaria beds in Nemuro, there is no efficient method to mesuring “Needless Seaweed” which prevent the growth of laminaria. Alaria praelonga Kjellmen is one of Needless Seaweeds which has a vein on the surface. In this paper, we explain about extraction method of this vein to mesure Alaria praelonga Kjellmen from the image.