573 research outputs found
Person Re-identification with Correspondence Structure Learning
This paper addresses the problem of handling spatial misalignments due to
camera-view changes or human-pose variations in person re-identification. We
first introduce a boosting-based approach to learn a correspondence structure
which indicates the patch-wise matching probabilities between images from a
target camera pair. The learned correspondence structure can not only capture
the spatial correspondence pattern between cameras but also handle the
viewpoint or human-pose variation in individual images. We further introduce a
global-based matching process. It integrates a global matching constraint over
the learned correspondence structure to exclude cross-view misalignments during
the image patch matching process, hence achieving a more reliable matching
score between images. Experimental results on various datasets demonstrate the
effectiveness of our approach
Normal families and shared values of meromorphic functions
AbstractLet k(⩾2) be a positive integer, let F be a family of meromorphic functions in a domain D, all of whose zeros have multiplicity at least k+1, and let a(z)(≠0), h(z)(≢0) be two holomorphic functions on D. If, for each f∈F, f=a(z)⇔f(k)=h(z), then F is normal in D
Learning Correspondence Structures for Person Re-identification
This paper addresses the problem of handling spatial misalignments due to
camera-view changes or human-pose variations in person re-identification. We
first introduce a boosting-based approach to learn a correspondence structure
which indicates the patch-wise matching probabilities between images from a
target camera pair. The learned correspondence structure can not only capture
the spatial correspondence pattern between cameras but also handle the
viewpoint or human-pose variation in individual images. We further introduce a
global constraint-based matching process. It integrates a global matching
constraint over the learned correspondence structure to exclude cross-view
misalignments during the image patch matching process, hence achieving a more
reliable matching score between images. Finally, we also extend our approach by
introducing a multi-structure scheme, which learns a set of local
correspondence structures to capture the spatial correspondence sub-patterns
between a camera pair, so as to handle the spatial misalignments between
individual images in a more precise way. Experimental results on various
datasets demonstrate the effectiveness of our approach.Comment: IEEE Trans. Image Processing, vol. 26, no. 5, pp. 2438-2453, 2017.
The project page for this paper is available at
http://min.sjtu.edu.cn/lwydemo/personReID.htm arXiv admin note: text overlap
with arXiv:1504.0624
Changes in respiratory structure and function after traumatic cervical spinal cord injury: observations from spinal cord and brain
Respiratory difficulties and mortality following severe cervical spinal cord injury (CSCI) result primarily from malfunctions of respiratory pathways and the paralyzed diaphragm. Nonetheless, individuals with CSCI can experience partial recovery of respiratory function through respiratory neuroplasticity. For decades, researchers have revealed the potential mechanism of respiratory nerve plasticity after CSCI, and have made progress in tissue healing and functional recovery. While most existing studies on respiratory plasticity after spinal cord injuries have focused on the cervical spinal cord, there is a paucity of research on respiratory-related brain structures following such injuries. Given the interconnectedness of the spinal cord and the brain, traumatic changes to the former can also impact the latter. Consequently, are there other potential therapeutic targets to consider? This review introduces the anatomy and physiology of typical respiratory centers, explores alterations in respiratory function following spinal cord injuries, and delves into the structural foundations of modified respiratory function in patients with CSCI. Additionally, we propose that magnetic resonance neuroimaging holds promise in the study of respiratory function post-CSCI. By studying respiratory plasticity in the brain and spinal cord after CSCI, we hope to guide future clinical work
Self-supervised Point Cloud Representation Learning via Separating Mixed Shapes
The manual annotation for large-scale point clouds costs a lot of time and is
usually unavailable in harsh real-world scenarios. Inspired by the great
success of the pre-training and fine-tuning paradigm in both vision and
language tasks, we argue that pre-training is one potential solution for
obtaining a scalable model to 3D point cloud downstream tasks as well. In this
paper, we, therefore, explore a new self-supervised learning method, called
Mixing and Disentangling (MD), for 3D point cloud representation learning. As
the name implies, we mix two input shapes and demand the model learning to
separate the inputs from the mixed shape. We leverage this reconstruction task
as the pretext optimization objective for self-supervised learning. There are
two primary advantages: 1) Compared to prevailing image datasets, eg, ImageNet,
point cloud datasets are de facto small. The mixing process can provide a much
larger online training sample pool. 2) On the other hand, the disentangling
process motivates the model to mine the geometric prior knowledge, eg, key
points. To verify the effectiveness of the proposed pretext task, we build one
baseline network, which is composed of one encoder and one decoder. During
pre-training, we mix two original shapes and obtain the geometry-aware
embedding from the encoder, then an instance-adaptive decoder is applied to
recover the original shapes from the embedding. Albeit simple, the pre-trained
encoder can capture the key points of an unseen point cloud and surpasses the
encoder trained from scratch on downstream tasks. The proposed method has
improved the empirical performance on both ModelNet-40 and ShapeNet-Part
datasets in terms of point cloud classification and segmentation tasks. We
further conduct ablation studies to explore the effect of each component and
verify the generalization of our proposed strategy by harnessing different
backbones
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