A method for calculating river ice surface area and flow velocity based on shore-based fixed camera

CN122454499APending Publication Date: 2026-07-24JIANGSU NANSHUI WATER AFFAIRS TECH CO LTD
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Patent Information

Application Number
CN202610490748.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-04-14
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

Existing river ice area monitoring technologies suffer from high costs, difficult deployment, low measurement accuracy, and inability to accurately convert pixels into physical distances, thus failing to meet the quantitative measurement needs of water conservancy monitoring.

Method used

A monocular camera field-of-view model adapted to river scenarios is constructed. Combined with an ice condition image semantic segmentation model, accurate mapping between pixel coordinates and physical coordinates is achieved. Distance transformation is performed using the principle of triangle similarity and trigonometric function calculation formulas. The river ice flow velocity is calculated using a Gaussian mixture model.

Benefits of technology

It enables precise quantitative calculation of river ice area and flow velocity, reduces equipment costs and deployment difficulty, and achieves long-term, real-time, and accurate monitoring of river ice conditions.

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Abstract

The application discloses a kind of river ice surface area and flow velocity calculation method based on shore-based fixed camera, the field model of single monitoring camera fixed on river is constructed, the mapping relationship of image pixel coordinates and actual physical coordinates of river is established, the goal of converting video pixel distance to actual physical distance is realized;Combined with the semantic segmentation result of ice image collected by the camera, the accurate quantitative calculation of the actual area of river ice surface and the ice coverage index is realized, the technical problems that unmanned aerial vehicle, remote sensing image and other technologies cannot continuously and accurately monitor are solved, the equipment cost and deployment difficulty are reduced, and long-term real-time accurate monitoring of river ice conditions is realized.
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Citation Information

Patent Citations

  • River freezing area proportion calculation method, system, medium and equipment

    CN119228871A