研究目的
Investigating the strategy for training neural networks for object detection in range images obtained from one type of LiDAR sensor using labeled data from a different type of LiDAR sensor, and presenting an efficient model for object detection in range images for use in self-driving cars.
研究成果
The paper demonstrates that labeled data from one type of LiDAR sensor can be used to train a neural network for object detection with a different type of sensor. The presented model can detect objects in real-time, though there is a performance gap compared to the highest-ranking detectors in the KITTI benchmark. Combining the results with more sophisticated non-maximum suppression strategies could further reduce this gap.
研究不足
The detection performance drops significantly for objects at larger distances, and close-by objects on the side of the vehicle are not detected reliably. The training dataset's bias towards certain object classes and limited sensor types may affect generalization.
1:Experimental Design and Method Selection:
The methodology involves training a neural network for object detection in range images from a lower resolution LiDAR sensor using data from a higher resolution sensor. The network is designed to be efficient enough for real-time processing.
2:Sample Selection and Data Sources:
The KITTI dataset, recorded with a Velodyne HDL-64E sensor, is used for training. Data from a Velodyne VLP-32 sensor mounted on a research vehicle is used for validation.
3:List of Experimental Equipment and Materials:
Velodyne HDL-64E and VLP-32 LiDAR sensors, Nvidia GeForce 1080Ti GPU for processing.
4:Experimental Procedures and Operational Workflow:
The training data is modified to simulate data from the lower resolution sensor. The network processes range images to predict object parameters.
5:Data Analysis Methods:
The performance is evaluated using precision-recall curves and average precision values from the KITTI evaluation code. The detection ratio and root-mean-square error are calculated for the research vehicle data.
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