Development of algorithm for number of swimming fish individuals: a new approach by using PTV technique

2016 Fiscal Year Final Research Report

• Project/Area Number: 15K14785
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Aquatic bioproduction science
• Research Institution: Hokkaido University
• Principal Investigator: KIMURA Nobuo 北海道大学, 水産科学研究院, 教授 (50186326)
• Co-Investigator(Renkei-kenkyūsha): KOMEYAMA Kazuyoshi 北海道大学, 大学院水産科学研究院, 助教 (30550420) ; TORISAWA Shinsuke 近畿大学, 農学部, 講師 (80399097) ; HIRAISHI Tomonori 北海道大学, 大学院水産科学研究院, 教授 (10218761)
• Project Period (FY): 2015-04-01 – 2017-03-31
• Keywords: 個体数 / 養殖 / PTV / 計数 / 魚群

Outline of Final Research Achievements

To develop the fundamental technique of counting number of fish individuals in an aquaculture cage, the basic algorithm for counting individuals was constructed by applying PTV (Particle Tracking Velocimetry) technique. The region above a certain area and brightness was defined as the candidate region of an individual. The movement vectors of the extracted regions were estimated by using Kalman filter, and the number of the vectors was possible to give that of individuals. When 200 individuals were put in an experimental tank, applying the algorithm showed that the averaged error was 5.9% and its availability was confirmed.

Free Research Field

水産工学