Pedestrians in videos are usually in a moving state, resulting in serious spatial misalignment like scale variations and pose changes, which makes the video-based person re-identification problem more challenging. To address the above issue, in this paper, we propose a Frame-Guided Region-Aligned model (FGRA) for discriminative representation learning in two steps in an end-to-end manner. Firstly, based on a frame-guided feature learning strategy and a non-parametric alignment module, a novel alignment mechanism is proposed to extract well-aligned region features. Secondly, in order to form a sequence representation, an effective feature aggregation strategy that utilizes temporal alignment score and spatial attention is adopted to fuse region features in the temporal and spatial dimensions, respectively. Experiments are conducted on benchmark datasets to demonstrate the effectiveness of the proposed method to solve the misalignment problem and the superiority of the proposed method to the existing video-based person re-identification methods.
Inpainting deteriorated regions in digital Dunhuang murals is important for Dunhuang mural content preservation. Algorithms of mural image inpainting help simplify the digital restoration process of the deteriorated murals. Most of the existing algorithms can restore plausible content for homogeneous missing regions in Dunhuang mural images, however, they often fail to fill accurate color in missing regions that contain complex structures, which is mainly due to the neglect of color relevance between positions in the missing structural region and the non-missing color regions. In this paper, we propose a deep-learning-based structure-guided inpainting method for Dunhuang mural image, which utilizes relevant color information in deep features to improve the color inpainting quality for structural regions. Specifically, we design a structure-guided feature refinement module, which explicitly leverages color relevance implied in structure information to select relevant features for refining features in the missing region. In addition, we propose a multi-step scheme for feature refinement to better propagate non-missing region feature information to the missing region. We conduct experiments on Dunhuang660 and Dunhuang No.7 Grotto datasets and the results demonstrate that our proposed method can achieve improved color inpainting quality for missing structural regions in Dunhuang mural images.
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