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• W4319965865 abstract "Ground filtering (GF) is a fundamental step for airborne laser scanning (ALS) data processing. The advent of deep learning techniques provides new solutions to this problem. Existing deep-learning-based methods utilize a segmentation or classification framework to extract ground/non-ground points, which suffers from a dilemma in keeping high spatial resolution while acquiring rich contextual information when dealing with large-scale ALS data due to the computing resource limits. To this end, we propose SeqGP, a novel deep-learning-based GF pipeline that explicitly converts the GF task into an iterative sequential ground prediction (SeqGP) problem using points-profiles. The proposed SeqGP utilizes deep reinforcement learning (DRL) to optimize the prediction sequence and retrieve the bare terrain gradually. The 3D sparse convolution is integrated with the SeqGP strategy to generate high-precision classification results with memory efficiency. Extensive experiments on two challenging test sets demonstrate the state-of-the-art filtering performance and universality of the proposed method in dealing with large-scale ALS data." @default.
• W4319965865 created "2023-02-11" @default.
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• W4319965865 date "2023-02-09" @default.
• W4319965865 modified "2023-10-15" @default.
• W4319965865 title "Deep Ground Filtering of Large-Scale ALS Point Clouds via Iterative Sequential Ground Prediction" @default.
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• W4319965865 doi "https://doi.org/10.3390/rs15040961" @default.
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