Multibeam images of a fish farm

This dataset consists of Images produced from a Seapix-R multibeam echosounder (MBES) pointed at a fish farming cage. The MBES was attached outside the cage on a mounting bracket with a 45 deg downwards tilt, such that most of the cage was within the vertical beamforming capability of the system, with the exception of a small cake-shaped section near the net, 1.5 meters high, extending 5.5 meters into the cageThe MBES can steer acoustic beams at angles of $120^\circ \times 120^\circ$ and operates at a frequency range of 145-155 kHz. The beam aperture of the Seapix-R is 1.6 times 1.6 degreees on the element axis. The dataset was obtained during one data collection event. The trial was conducted at a Lingelaks site in Bergadalen, Norway. The data capture started at 09:22 on April 15 2021, during daylight hours and outside the routine feeding schedule, ensuring minimal disturbances and deviations in behavioural patterns. The range of each image is from 0 to 10 m. The tilt of the swath is 55 deg. The image is captured in the vertical direction.Backscatter in the images is caused by atlantic salmon swimming in the cage.

本数据集由搭载于鱼类养殖网箱外侧的Seapix-R型多波束测深仪（Multibeam Echosounder，MBES）采集得到，该测深仪以向下45°的倾角安装于支架之上，使得网箱绝大部分区域处于系统的垂直波束成像范围内，仅网箱周边存在一块高1.5米、向网箱内延伸5.5米的饼状盲区。Seapix-R型多波束测深仪可在120°×120°的角度范围内操控声束，工作频率区间为145~155 kHz，其波束在单元轴向上的孔径为1.6°×1.6°。本数据集仅通过单次数据采集任务获取。本次数据采集试验于挪威贝格达伦（Bergadalen）的Lingelaks养殖基地开展，数据采集启动于2021年4月15日09:22，采集时段为白天且避开常规投喂周期，以最大限度降低对鱼类行为模式的干扰与偏差。单幅图像的探测范围为0至10米，测绘条带的倾角为55°，图像采用垂直方向采集。图像中的声学反向散射信号由网箱内游动的大西洋鲑产生。

搜集汇总

背景与挑战

背景概述

该数据集包含使用Seapix-R多波束回声测深仪（MBES）对鱼养殖网箱采集的图像，主要用于检测网箱内大西洋鲑鱼的活动。数据采集于2021年4月15日在挪威的Lingelaks站点进行，技术参数包括工作频率145-155 kHz、图像范围0-10米和倾斜角55度，采集时间选在非喂食时段以最小化行为干扰，适用于水产养殖行为研究。