基于YOLACT的冰体环向裂纹尺寸识别方法

周利; 蔡金延; 丁仕风; 刘仁伟; 曾鼎瀚

doi:10.19693/j.issn.1673-3185.03024

基于YOLACT的冰体环向裂纹尺寸识别方法

Method of recognizing ice circumferential crack size based on YOLACT

摘要

摘要:
目的在使用环向裂纹法计算冰载荷时，裂纹的尺寸都是采用经验公式的方法进行估算，在选择经验参数时往往存在很多不确定性，为此提出一种基于YOLACT的环向裂纹参数计算方法，以准确获取海冰裂纹尺寸。
方法通过YOLACT网络识别随船拍摄图像中的冰块，然后对检测到的掩膜进行边缘检测，得到冰块裂纹形状，对裂纹进行圆弧拟合获取破冰半径和破冰角。
结果计算结果表明，半径的识别准确率达96.12%，破冰角的识别准确率达96.58%。
结论该方法可在基于环向裂纹法计算冰载荷时，为环向裂纹法提供裂纹尺寸的精确输入，有助于极地船舶和寒冷地区海洋结构物的初始设计。

Abstract:
Objective When using the circumference crack method to calculate the ice load, the size of the circumference crack is usually determined by an empirical formula, but this can introduce many uncertainties to the selection of input parameters.
Methods To accurately determine the size of circumference cracks, we propose a method of recognizing ice circumference crack size based on YOLACT, which can identify ice in images taken with ships. We then detect the edge of the mask and obtain the shape of the ice cracks, and the ice breaking radius and angle can be estimated by fitting the cracks.
Results The results show that the accuracy of the ice breaking radius and angle estimated by the proposed method can reach up to 96.12% and 96.58% respectively.
Conclusion This method can accurately determine the size of circumference cracks and assist in the initial design of marine structures in cold regions.

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