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基于循环跨视图转换和多状态特征融合的鸟瞰图生成方法

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针对多数基于多视角透视图的鸟瞰图(BEV)生成算法难以实现对语义不一致多状态关联特征的提取,以及模型性能与复杂度的平衡等问题,提出一种基于轻量级Transformer的BEV生成模型.该模型采用端到端的单阶段训练策略,通过建立交通场景中动态车辆和静态道路信息的关联,滤除生成视图中的噪声.基于此,一方面设计面向多尺度特征的Transformer循环跨视图转换模块,通过注意力机制实现对输入的位置编码和表征学习,捕捉特征序列中不同位置的依赖关系,提升BEV特征的鲁棒性;另一方面设计面向语义不一致的多状态BEV特征融合模块,提取静态道路和动态车辆的关联信息,提升生成BEV视图的精度.在NuScenes数据集上进行实验,结果表明,方法在确保低模型复杂度的前提下,达到了先进的BEV视图生成性能.动态车辆和静态道路的语义分割精度分别达到了43.2%和82.0%.
Bird's eye view generation based on recurrent cross-view transformation and multi-state feature fusion
To address semantic inconsistency in multi-state associated feature extraction and balancing model performance with complexity in most multiple perspective view-based bird's eye view (BEV) generation method,a light-weight Transformer-based BEV generation model is proposed. The method utilizes an end-to-end one-stage training strategy to establish a mutual association between dynamic vehicle and static road information in traffic scenes,effectively filtering out noise in the generated BEV. A Transformer-based recurrent cross-view transformation module for multi-scale features is introduced to perform image encoding and representation learning. This module improves the robustness of the extracted BEV features by capturing the location-dependent relationships in the perspective view (PV) feature sequence. Additionally,a multi-state BEV feature fusion module is designed to address semantic inconsistencies,extracting correlated information between dynamic vehicles and static roads,thus enhancing the performance of the generated BEVs. Experiments on the NuScenes dataset show that this method achieves advanced BEV generation performance with low model complexity,achieving 43.2% and 82.0% semantic segmentation accuracy for dynamic vehicles and static roads,respectively.

map-view transitionlight-weight Transformerbird's eye viewperspective view

刘明杰、何峥言、陈俊生、刘平、朴昌浩

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重庆邮电大学自动化学院 重庆 400065

视图转换 轻量化Transformer模型 鸟瞰图 透视图

2024

仪器仪表学报
中国仪器仪表学会

仪器仪表学报

CSTPCD北大核心
影响因子:2.372
ISSN:0254-3087
年,卷(期):2024.45(10)