A new method of measuring the size of fish on the image from digital camera

2014 Fiscal Year Final Research Report

• Project/Area Number: 24580254
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: General fisheries
• Research Institution: Hokkaido University
• Principal Investigator: FUJIMORI Yasuzumi 北海道大学, 水産科学研究科(研究院), 教授 (40261341)
• Co-Investigator(Kenkyū-buntansha): YAMAMOTO Jun 北海道大学, 北方生物圏フィールド科学センター, 助教 (10292004)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 海洋観測 / 水中画像計測 / レーザー光

Outline of Final Research Achievements

This study aims to develop a new method of measuring the size of fish on the image from camera. The tank experiment was conducted using a digital camera and laser unit that generate flat beam. Further, sea experiment was done preparing a measuring system installed to watertight case that has capability of 300 m sea depth.
The measurement error was 4 % in mean and up to 5 % in the tank experiment. In the sea experiment, the measuring system was hanged underwater from the ship. The fish that recognized as walleye pollock was observed. The estimated length accorded with the size of walleye pollock distributed in the experimental area.

Free Research Field

漁業解析学