| abstract |
The invention belongs to the field of breeding monitoring, and proposes a low-cost fish growth monitoring method in a breeding farm, which is mainly realized by a network camera, a two-degree-of-freedom electric PTZ, a network cable, a switch and a PC. The method can obtain the body length data of the fish in the breeding pond through the network camera, which is not only convenient but also low in cost; and the system calibration task can be completed only with a square frame, which is simple and easy to implement. In addition, considering the influence of water depth on the image measurement when the fish is swimming, multi-layer calibration is carried out, and the length of the fish body is obtained by means of edge width positioning, image plane affine correction and segmental statistical calculation of the center line of the fish body, and the calculation is simple. And low consumption, easy to deploy. The invention combines the image measurement technology with the cultivation practice, and can obtain the length of the fish body in a free state in a non-contact and real-time state. |