Thirdly, pavement dilapidation image is divided into subblock image, and the marginal information is extracted from subblock image by the region detection algorithm.
利用了区域检测算法，将路面破损图像划分成子块图像，提取破损路面的边缘
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词
,重点恢复;Thirdly, pavement dilapidation image is divided into subblock image, and the marginal information is extracted from subblock image by the region detection algorithm.
利用了区域检测算法，将路面破损图像划分成子块图像，提取破损路面的边缘；
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