Method and system for determining a fish body model

Abstract

The invention discloses a method and system for determining a fish body model. The method includes: acquiring fish body image data and fish body three-dimensional scanning data of each fish body; constructing a fish body three-dimensional template model according to the fish body image data; using the fish body three-dimensional template model to perform grid registration on the fish body three-dimensional scanning data , get the fish body 3D mesh model, and construct the fish mesh dataset from the fish body 3D mesh model of each fish body; the topological structure of all the fish body 3D mesh models in the fish mesh dataset is the same; adopt The principal component analysis method parametrically models the three-dimensional mesh models of each fish body in the fish mesh data set, and generates the three-dimensional mesh parametric models of each fish body. The invention realizes the construction of the three-dimensional model of the fish body, can comprehensively analyze the growth changes of the fish, and can carry out fine identification of the fish species.

Description

technical field [0001] The invention relates to the field of fish morphology, in particular to a method and system for determining a fish body model. Background technique [0002] In recent years, the aquaculture industry has developed rapidly and has made important contributions to the improvement of residents' living standards. Fish is an important biological species in the aquatic ecosystem and plays a key role in the material cycle and energy flow of the aquatic ecosystem. [0003] There are two main methods for the study of fish growth changes in traditional fish farming: the first one relies on the experience and judgment of the breeder. After an experienced breeder sees a fish, he can basically determine the size of the fish according to its size. It is in a growth stage, but this method cannot construct a growth change model of fish and requires long-term farming experience accumulated by farmers. Another method is to obtain the weight and body length of the fish b...

AI Technical Summary

Problems solved by technology

[0003] There are two main methods for the study of fish growth changes in traditional fish farming: the first one relies on the experience and judgment of the breeder. After an experienced breeder sees a fish, he can basically determine the size of the fish according to its size. It is in a growth stage, but this method cannot construct a growth change model of fish and requires long-term farming experience accumulated by farmers

Another method is to obtain the weight and body length of the fish by manual means, and then use the weight and body length as parameters to fit a growth function to quantify a simple fish growth model. The measurement of body length and weight parameters during the growth process of fish leads to an increase in labor costs. Moreover, only two-dimensional parameters such as body length and weight cannot be used to conduct a comprehensive analysis of fish growth changes.

For example, the appearance characteristics of some closely related species are very similar, and the variation ranges of the traditional basic two-dimensional morphological characteristics overlap. There are still deficiencies in distinguishing fish species with two-dimensional morphological information, and it is impossible to achieve fine-grained analysis of fish species. identify

Images