论文标题
FCFR-NET:基于特征融合的粗到精细残差学习,以完成深度完成
FCFR-Net: Feature Fusion based Coarse-to-Fine Residual Learning for Depth Completion
论文作者
论文摘要
深度完成旨在从以相应的颜色图像为输入的稀疏深度图中恢复密集的深度图。最近的方法主要将深度完成为一阶段的端到端学习任务,该任务直接输出密集的深度图。但是,一阶段框架中的特征提取和监督不足,从而限制了这些方法的性能。为了解决这个问题,我们提出了一个新颖的端到端残差学习框架,该框架将深度完成为两阶段的学习任务,即稀疏到较差的阶段和一个粗到精细的阶段。首先,通过简单的CNN框架获得粗糙的密度深度图。然后,使用残留的学习策略在粗到精细的阶段进一步获得了精致的深度图,并以粗糙深度图和颜色图像作为输入。特别是,在粗到最新的阶段,通道洗牌提取操作可用于从颜色图像和粗深度图中提取更具代表性的特征,并且利用基于能量的融合操作来有效融合通过通道洗牌操作获得的这些特征,从而导致更准确和更精致的深度图。我们在Kitti基准测试的RMSE中实现了SOTA性能。对其他数据集进行的广泛实验表明,我们的方法优于当前最新深度完成方法。
Depth completion aims to recover a dense depth map from a sparse depth map with the corresponding color image as input. Recent approaches mainly formulate depth completion as a one-stage end-to-end learning task, which outputs dense depth maps directly. However, the feature extraction and supervision in one-stage frameworks are insufficient, limiting the performance of these approaches. To address this problem, we propose a novel end-to-end residual learning framework, which formulates the depth completion as a two-stage learning task, i.e., a sparse-to-coarse stage and a coarse-to-fine stage. First, a coarse dense depth map is obtained by a simple CNN framework. Then, a refined depth map is further obtained using a residual learning strategy in the coarse-to-fine stage with a coarse depth map and color image as input. Specially, in the coarse-to-fine stage, a channel shuffle extraction operation is utilized to extract more representative features from the color image and coarse depth map, and an energy based fusion operation is exploited to effectively fuse these features obtained by channel shuffle operation, thus leading to more accurate and refined depth maps. We achieve SoTA performance in RMSE on KITTI benchmark. Extensive experiments on other datasets future demonstrate the superiority of our approach over current state-of-the-art depth completion approaches.