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Smart Agriculture ›› 2019, Vol. 1 ›› Issue (1): 76-84.doi: 10.12133/j.smartag.2019.1.1.201812-SA016

• Intelligent Management and Control • Previous Articles     Next Articles

Evaluation of fish feeding intensity in aquaculture based on near-infrared machine vision

Zhou Chao1,2,3,4, Xu Daming1,2,3,4, Lin Kai1,2,3,4, Chen Lan1,2,3,4, Zhang Song1,2,3,4, Sun Chuanheng1,2,3,4, Yang Xinting1,2,3,4,*()   

  1. 1. Beijing Research Center for Information Technology in Agriculture, Beijing 100097, China
    2. National Engineering Research Center for Information Technology in Agriculture, Beijing 100097, China
    3. National Engineering Laboratory for Agri-product Quality Traceability, Beijing 100097, China
    4. Key Laboratory for Information Technologies in Agriculture, Ministry of Agriculture, Beijing 100097, China
  • Received:2018-11-20 Revised:2018-12-28 Online:2019-02-22 Published:2019-02-22
  • corresponding author: Xinting Yang E-mail:yangxt@nercita.org.cn


In aquaculture, feeding intensity can directly reflect the appetite of fish, which is of great significance for guiding feeding and productive practice. However, most of the existing fish feeding intensity evaluation methods have problems of low observation efficiency and low objectivity. In this study, a fish feeding intensity evaluation method based on near-infrared machine vision was proposed to achieve an automatic objective evaluation of fish appetite. Firstly, a near-infrared image acquisition system was built by using near-infrared industrial camera. After a series of image processing steps, the gray level co-occurrence matrix was used to extract the texture feature variable information of the image, including contrast, energy, correlation, inverse gap and entropy. Then the data set were constructed by using these five feature variables as input vectors, and the support vector machine classifier was trained. Among them, the optimal penalty coefficient c and kernel function parameter g were selected by grid search. Finally, the trained images were used to classify the feeding images of fish. And ultimately, the evaluation of fish feeding intensity was realized. The results show that the accuracy of the evaluation could reach 87.78%. In addition, this method does not need to consider the impact of reflections, sprays and other factors on image processing results, so it has strong adaptability and can be used for automatic and objective evaluation of fish appetite, thus provide theoretical basis and methodological support for subsequent feeding decisions.

Key words: aquaculture, near-infrared machine vision, feeding activity evaluation, support vector machine, feeding decision

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