计算机科学 ›› 2025, Vol. 52 ›› Issue (12): 133-140.doi: 10.11896/jsjkx.241200212
洪铭骏, 纪庆革
HONG Mingjun, JI Qingge
摘要: 行人轨迹预测是自动驾驶和智能监控系统中的一项基础而关键的任务。场景的限制是影响行人运动轨迹的重要因素之一。尽管现有的研究已经尝试将场景因素融入轨迹预测中,但这些方法在整合场景信息时往往存在不足,尤其是没有考虑到场景的全面融合。对此,提出了一种新的行人轨迹预测模型——构建场景-行人-行人交互的时空图卷积网络SPP-STGCN(Spatio-Temporal Graph Convolutional Network with Scene-Perdestrian-Perdestrain Interactions)。SPP-STGCN模型采用两阶段架构来提高预测准确性。第一阶段,模型将轨迹和场景数据整合输入,通过场景邻接矩阵融合块SAFB实现两种特征的融合,构建出融合场景特征的时空图邻接矩阵,为预测提供丰富的上下文信息。同时,模型在时间、空间两个维度并行执行,结合轨迹信息分别构造出描述时间相关性的和空间相关性的行人轨迹时空图。第二阶段,场景图卷积网络对时间与空间维度的时空图进行特征提取。提取的特征随后被融合,并通过时间金字塔外推卷积进行处理,以获得行人未来轨迹的二维高斯分布。最后SPP-STGCN以该分布作为预测行人轨迹的概率模型,通过采样生成行人未来轨迹。在ETH和UCY公开数据集上的对比实验结果显示,SPP-STGCN模型在与9种主流模型的对比实验中的表现达到了目前的最佳水平。消融实验与定性分析进一步证实了所提模型的有效性与合理性。SPP-STGCN模型通过有效整合场景特征,显著提升了行人轨迹预测的性能。
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