Device and method for locating fish trajectories over dams based on video signals

Abstract

The invention discloses a video signal based fish dam-passing movement track positioning apparatus and method. The apparatus comprises a video acquiring apparatus and a video processing apparatus, wherein the video acquiring apparatus comprises a truss, and three underwater cameras that are fixedly arranged on three mutually perpendicular planes of the truss and comprise a top camera, a right camera, and a front camera; the video processing apparatus comprises a computer, and an image processing system arranged on the computer; and the underwater cameras are connected to the computer by a data line; and any position on the truss is provided with an absolute reference coordinate system. The video signal based fish dam-passing movement track positioning apparatus and method disclosed by the invention have the characteristics of high degree of automation and strong robustness, so that a fish dam-passing movement track can be positioned effectively in real time.

Description

technical field [0001] The invention relates to a video signal-based device and method for locating the motion track of fish crossing a dam, in particular to the field of monitoring the motion track of fish crossing a dam. Background technique [0002] The blocking of rivers by water conservancy and hydropower projects has seriously affected the river ecosystem. Among them, fish with migratory habits have the greatest impact. Due to the barrier of the dam, many migratory fish cannot reproduce through migration, resulting in a sharp decrease in their species and numbers. In order to reduce the disturbance of dams to these migratory fish populations, people often build fish passing facilities such as fishways on dams. And most of the fish passing facilities built in my country do not meet the swimming habits of fish at present, so its fish passing effect is not satisfactory. In order to build fishway facilities that conform to the swimming habits of fish and improve the ecos...

AI Technical Summary

Problems solved by technology

At present, due to reasons such as low underwater visibility and the openness of the environment, it is difficult for general sensors to meet the positioning requirements for fish swimming behavior and trajectory. Therefore, researchers mainly use sonar positioning technology and horizontal fish shadow detection technology to detect fish However, due to the complex underwater acoustic noise and high noise power density, the sonar signal generated by fish swimming is easily submerged in the environmental noise, and the sonar signal positioning technology itself is relatively complicated, so in actual use The effect is not ideal

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