The condition assessment of road surfaces is essential to ensure their serviceability while still providing maximum road traffic safety. This paper presents a robust stereo vision system embedded in an unmanned aerial vehicle (UAV). The perspective view of the target image is first transformed into the reference view, and this not only improves the disparity accuracy, but also reduces the algorithm's computational complexity. The cost volumes generated from stereo matching are then filtered using a bilateral filter. The latter has been proved to be a feasible solution for the functional minimisation problem in a fully connected Markov random field model. Finally, the disparity maps are transformed by minimising an energy function with respect to the roll angle and disparity projection model. This makes the damaged road areas more distinguishable from the road surface. The proposed system is implemented on an NVIDIA Jetson TX2 GPU with CUDA for real-time purposes. It is demonstrated through experiments that the damaged road areas can be easily distinguished from the transformed disparity maps.

本文介绍了一种嵌入在无人机上的稳健立体视觉系统，可以实时准确地评估道路表面的状况，从而支持道路交通的安全。通过改进视角变换和使用双边滤波器来过滤生成的代价体积，以及最小化能量函数，通过单独检测受损道路区域，降低了算法的计算复杂度。

嵌入式无人机实时密集立体视觉用于道路检测