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Indoor high-density aquaculture fish two-dimensional coordinate acquisition method based on computer vision technology

A technology of computer vision and two-dimensional coordinates, which is applied in the directions of computer components, calculation, image data processing, etc., can solve problems such as fogging, blurred images of fish schools, and affecting the accurate acquisition of two-dimensional centroid coordinates of individual fish schools, etc., to achieve The effect of reducing economic risk

Inactive Publication Date: 2020-06-26
CHANGZHOU INST OF TECH
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Problems solved by technology

[0004] With the help of a two-dimensional computer image data acquisition system, the images of fish schools on the water surface of indoor aquaculture ponds are collected, because the images of fish schools obtained from the water surface have defects such as blurring and fogging, which affect the coordinates of the two-dimensional center of mass of each individual fish school. Accurately obtained

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  • Indoor high-density aquaculture fish two-dimensional coordinate acquisition method based on computer vision technology
  • Indoor high-density aquaculture fish two-dimensional coordinate acquisition method based on computer vision technology
  • Indoor high-density aquaculture fish two-dimensional coordinate acquisition method based on computer vision technology

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specific Embodiment

[0030] Specific embodiments: Generally, cameras are used in an environment where the air medium is relatively uniform, and the atmospheric scattering model can be simplified as:

[0031] I(x)=Aρ(x)t(x)+A(1-t(x)) (1)

[0032] Among them: I(x): the fogged image actually captured by the camera;

[0033] ρ(x): standard scene reflectance (the normalized radiation of the photographed target);

[0034] A: Sky (atmosphere) light intensity;

[0035] t(x): Transmittance, the reflected light of the object effectively entering the camera;

[0036] Usually, image dehazing enhancement processing is based on the formula 1 model. In the present invention, the calculation process of He obtaining the atmospheric light intensity A from the dark channel prior theory is optimized, and the value of the atmospheric light intensity A is approximately determined by using an interval estimation method. According to the dark channel prior theory, minimize both sides of Equation 1, and get:

[0037]...

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Abstract

The invention discloses an indoor high-density aquaculture fish two-dimensional coordinate acquisition method based on a computer vision technology. The method comprises the following steps: acquiringan aquaculture fish image; optimizing the atmospheric scattering model; obtaining a dark channel image; optimizing the transmittance; carrying out morphological processing; dividing the fish target in a watershed; calculating two-dimensional coordinates of fish target. According to the invention, the dark channel prior theory algorithm originally used for outdoor image defogging is improved, thetransmittance calculation method is optimized, and the atmospheric light intensity value can be adjusted according to the actual situation of the image. The processed fish school image is rich in individual detail information, strong in layering sense and high in contrast ratio. On this basis, distance transformation and morphological reconstruction are carried out on the constructed binary image,and the watershed algorithm is used to effectively segment the adhered individuals in the fish school, thereby providing guarantee for reliable calculation of coordinates of each mass center of the fish school.

Description

technical field [0001] The invention belongs to the technical field of intelligent aquaculture, and specifically relates to a method for acquiring two-dimensional coordinates of indoor high-density aquaculture fish based on computer vision technology. Background technique [0002] China's freshwater aquaculture area accounts for 73.04% of the total area, and freshwater aquaculture has long occupied an important position in my country's national economic system. The middle and lower reaches of the Yangtze River are rich in water resources and are the main areas for freshwater aquaculture in my country. Affected by the subtropical monsoon climate, summer in the middle and lower reaches of the Yangtze River is generally high temperature, high pressure, and rainy, which is a high-risk period for freshwater aquaculture. Every year in this area alone, due to the lack of dissolved oxygen in the water body, the remedy is not timely, resulting in the loss of hundreds of millions of ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00G06K9/34G06K9/38G06T5/00G06T5/20
CPCG06T5/20G06V20/36G06V10/28G06V10/267G06T5/70
Inventor 鲍玉军张兵焦玉全宋珍伟
Owner CHANGZHOU INST OF TECH
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