Fish body length measuring method and system
By combining geometric measurement with statistical models to estimate fish body length, the problems of accuracy and stability in fish body length measurement under complex environments have been solved, achieving low-cost and highly reliable fish body length measurement that is suitable for aquaculture environments.
CN121999355AActive Publication Date: 2026-05-08ZHEJIANG UNIV
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Patent Information
- Application Number
- CN202610459297.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-04-09
- Publication Date
- 2026-05-08
- Estimated Expiration
- 2046-04-09
AI Technical Summary
Technical Problem
Existing fish length measurement technologies suffer from low accuracy and poor stability in complex aquaculture environments, and are also computationally expensive, making it difficult to meet the actual needs of aquaculture.
Method used
An adaptive fusion mechanism was constructed by combining geometric measurement and statistical modeling, along with fish contour extraction and skeleton analysis. The measurement weights were evaluated and adjusted by shape quality indicators to achieve stable measurement of fish length.
Benefits of technology
It improves the stability and accuracy of measurements in complex environments, reduces the demand for computing resources, adapts to different fish species and shooting conditions, and has low cost and high interpretability.
✦ Generated by Eureka AI based on patent content.
Abstract
The invention discloses a fish body length measuring method and system. The method is realized based on geometric measurement and statistical model fusion. According to the method, stable and reliable fish body length measurement under the conditions of complex fish body postures and segmentation errors is realized by constructing a two-channel length estimation method of a geometric measurement and area statistics model and combining a shape quality index-based adaptive fusion mechanism. Specifically, geometric measurement length is obtained through fish body contour extraction and skeleton analysis, a statistical length estimation model is constructed based on fish body area and shape features, and area estimation length is obtained. In order to improve the stability of the system in a complex scene, a self-adaptive fusion mechanism based on a shape quality index is further constructed, indexes such as fish body contour integrity, contour smoothness and a region filling rate are evaluated, and a measurement credibility weight is calculated; and carrying out adaptive fusion on the geometric measurement result and the area estimation result according to the weight to obtain a final fish body length estimation value.
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