7,906 research outputs found
Erasing, Transforming, and Noising Defense Network for Occluded Person Re-Identification
Occlusion perturbation presents a significant challenge in person
re-identification (re-ID), and existing methods that rely on external visual
cues require additional computational resources and only consider the issue of
missing information caused by occlusion. In this paper, we propose a simple yet
effective framework, termed Erasing, Transforming, and Noising Defense Network
(ETNDNet), which treats occlusion as a noise disturbance and solves occluded
person re-ID from the perspective of adversarial defense. In the proposed
ETNDNet, we introduce three strategies: Firstly, we randomly erase the feature
map to create an adversarial representation with incomplete information,
enabling adversarial learning of identity loss to protect the re-ID system from
the disturbance of missing information. Secondly, we introduce random
transformations to simulate the position misalignment caused by occlusion,
training the extractor and classifier adversarially to learn robust
representations immune to misaligned information. Thirdly, we perturb the
feature map with random values to address noisy information introduced by
obstacles and non-target pedestrians, and employ adversarial gaming in the
re-ID system to enhance its resistance to occlusion noise. Without bells and
whistles, ETNDNet has three key highlights: (i) it does not require any
external modules with parameters, (ii) it effectively handles various issues
caused by occlusion from obstacles and non-target pedestrians, and (iii) it
designs the first GAN-based adversarial defense paradigm for occluded person
re-ID. Extensive experiments on five public datasets fully demonstrate the
effectiveness, superiority, and practicality of the proposed ETNDNet. The code
will be released at \url{https://github.com/nengdong96/ETNDNet}
Adversarial erasing attention for person re-identification in camera networks under complex environments
Person re-identification (Re-ID) in camera networks under complex environments has achieved promising performance using deep feature representations. However, most approaches usually ignore to learn features from non-salient parts of pedestrian, which results in an incomplete pedestrian representation. In this paper, we propose a novel person Re-ID method named Adversarial Erasing Attention (AEA) to mine discriminative completed features using an adversarial way. Specifically, the proposed AEA consists of the basic network and the complementary network. On the one hand, original pedestrian images are used to train the basic network in order to extract global and local deep features. On the other hand, to learn features complementary to the basic network, we propose the adversarial erasing operation, that locates non-salient areas with the help of attention map, to generate erased pedestrian images. Then, we utilize them to train the complementary network and adopt the dynamic strategy to match the dynamic status of AEA in the learning process. Hence, the diversity of training samples is enriched and the complementary network could discover new clues when learning deep features. Finally, we combine the features learned from the basic and complementary networks to represent the pedestrian image. Experiments on three databases (Market1501, CUHK03 and DukeMTMC-reID) demonstrate the proposed AEA achieves great performances
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