路面影像破损加权评定方法

Pavement Image Distress Evaluation Method Based on Weighted Scheme

为了解决经典的基于影像分块的统一破损指数评定方法(UCI方法)评定结果不合理的问题,提出了一种新的基于加权策略的路面影像破损评定方法。该方法首先对影像分割后的二值影像进行分块;然后统计各子块中潜在破损像素在子块中的比重,并将其作为该子块的破损程度值;最后通过对子块化后的矩阵加权统计得到影像的破损指数。试验结果对比表明:该方法比UCI方法能更准确地反映出路面破损的程度。

In order to solve the problem that evaluation result of classical unified crack index （UCI） pavement distress evaluation method based on image tile is unreasonable, a novel pavement image distress evaluation method based on weighted scheme was proposed. The segmented binary images were separated into image tiles, then the proportion value between the cracked pixels and the entire image tile was regarded as the dilapidation degree. In the end, distress statistic method based on the weighted scheme was executed to get the crack index of the whole image. Comparisons of experiment result demonstrate that a much more pavement dilapidation degree can be derived by the proposed method than that by the classical UCI method.