研究目的
To achieve accurate and reliable lane-marking semantic segmentation in aerial imagery for the creation of high-precision maps necessary for autonomous driving, infrastructure monitoring, lanewise traffic management, and urban planning.
研究成果
The study concludes that the proposed Aerial LaneNet network, enhanced by wavelet transform and a cost-sensitive loss function, achieves high accuracy in lane-marking segmentation in aerial imagery. The network outperforms state-of-the-art methods and shows robustness to variations in GSD, camera angle view, and illumination conditions. The introduced AerialLanes18 data set serves as a benchmark for future research in this domain.
研究不足
The limitations include difficulties in shadow areas, semantic signs on the roads, and washed out lane markings. The network also shows reduced performance in segmenting very small lane-marking objects and in the presence of complex backgrounds.
1:Experimental Design and Method Selection:
The study proposes a symmetric fully convolutional neural network (FCNN) enhanced by wavelet transform for lane-marking segmentation in aerial imagery. The methodology includes the use of a customized loss function and a new type of data augmentation step to address the heavily unbalanced problem of lane-marking pixels compared to background pixels.
2:Sample Selection and Data Sources:
The experiments were conducted using images acquired by the German Aerospace Center (DLR) within a flight campaign, specifically the AerialLanes18 data set, which contains annotated lane markings in high-resolution aerial images.
3:List of Experimental Equipment and Materials:
The 3K camera system consisting of three Canon Eos 1Ds Mark III cameras was used for recording the raw data. The system was mounted on a flexible platform for aerial imagery capture.
4:Experimental Procedures and Operational Workflow:
The input images are processed by the proposed Aerial LaneNet network, which includes wavelet transform fusion, symmetric FCNN architecture, and a cost-sensitive loss function. The network is trained end-to-end using Adam optimizer and backpropagation.
5:Data Analysis Methods:
The performance of the network is evaluated using metrics such as pixel accuracy, mean accuracy, mean IoU, frequency weighted IoU, and dice similarity coefficient. The results are compared with state-of-the-art methods.
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