绝缘子巡检过程中要求快速、准确地检测出绝缘子及其缺陷,当前绝缘子检测算法存在检测速度慢、精确度低的问题。提出一种基于轻量化YOLOv7-DenseBlock的绝缘子检测算法。将原图通过二阶拉普拉斯算子进行锐化处理,以加强原图绝缘子的特征;在YOLOv7主干网络上加入Dense Block模块,以提高梯度的反向传播,并增强特征重用的效率;将激活函数替换为FRe LU,以解决PRe LU、Leaky Re LU激活函数对空间信息不敏感的问题,提高模型鲁棒性,降低模型的错检率、漏检率。实验结果表明,改进的模型更具轻量化,检测速度更快:相较于YOLOv7,其参数量减少了7.38%,低至33.79M;检测速度提升了9.55%,达到45.45 FPS。与YOLOv5-CBMA相比,其精度提升了1.77%。
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