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LG-CNN: From local parts to global discrimination for fine-grained recognition
Xie, Guo-Sen1; Zhang, Xu-Yao1; Yang, Wenhan3; Xu, Mingliang4; Yan, Shuicheng5; Liu, Cheng-Lin1,2
AbstractFine-grained recognition is one of the most difficult topics in visual recognition, which aims at distinguishing confusing categories such as bird species within a genus. The information of part and bounding boxes in fine-grained images is very important for improving the performance. However, in real applications, the part and/or bounding box annotations may not exist. This makes fine-grained recognition a challenging problem. In this paper, we propose a jointly trained Convolutional Neural Network (CNN) architecture to solve the fine-grained recognition problem without using part and bounding box information. In this framework, we first detect part candidates by calculating the gradients of feature maps of a trained CNN model w.r.t the input image and then filter out unnecessary ones by fusing two saliency detection methods. Meanwhile, two groups of global object locations are obtained based on the saliency detection methods and a segmentation method. With the filtered part candidates and approximate object locations as inputs, we construct the CNN architecture with local parts and global discrimination (LG-CNN) which consists of two CNN networks with shared weights. The upper stream of LG-CNN is focused on the part information of the input image, the bottom stream of LG-CNN is focused on the global input image. LG-CNN is jointly trained by two stream loss functions to guide the updating of the shared weights. Experiments on three popular fine-grained datasets well validate the effectiveness of our proposed LG-CNN architecture. Applying our LG-CNN architecture to generic object recognition datasets also yields superior performance over the directly fine-tuned CNN architecture with a large margin. (C) 2017 Elsevier Ltd. All rights reserved.
KeywordFine-grained Recognition Convolutional Neural Networks Bilinear Pooling Local Parts Global Discrimination
WOS HeadingsScience & Technology ; Technology
Indexed BySCI
Funding OrganizationNational Basic Research Program of China (973 Program)(2012CB316302) ; Strategic Priority Research Program of the CAS(XDA06040102 ; Natural Science Foundation of China(NSFC)(61472370 ; open project of State Key Laboratory of Virtual Reality Technology and System(BUAA-VR-16KF-07) ; XDB02060009) ; 61672469)
WOS Research AreaComputer Science ; Engineering
WOS SubjectComputer Science, Artificial Intelligence ; Engineering, Electrical & Electronic
WOS IDWOS:000406987400010
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Cited Times:12[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Affiliation1.Chinese Acad Sci, Inst Automat, Natl Lab Pattern Recognit, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing, Peoples R China
3.Peking Univ, Beijing 100871, Peoples R China
4.Zhengzhou Univ, Ctr Interdisciplinary Informat Sci Res, Zhengzhou 450001, Henan, Peoples R China
5.Natl Univ Singapore, Singapore 119077, Singapore
Recommended Citation
GB/T 7714
Xie, Guo-Sen,Zhang, Xu-Yao,Yang, Wenhan,et al. LG-CNN: From local parts to global discrimination for fine-grained recognition[J]. PATTERN RECOGNITION,2017,71(71):118-131.
APA Xie, Guo-Sen,Zhang, Xu-Yao,Yang, Wenhan,Xu, Mingliang,Yan, Shuicheng,&Liu, Cheng-Lin.(2017).LG-CNN: From local parts to global discrimination for fine-grained recognition.PATTERN RECOGNITION,71(71),118-131.
MLA Xie, Guo-Sen,et al."LG-CNN: From local parts to global discrimination for fine-grained recognition".PATTERN RECOGNITION 71.71(2017):118-131.
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