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Weakly supervised fine-grained recognition based on spatial-channel aware attention filters

Authors :
Lei Huang
Wenfeng Zhang
Bin Wang
Zhiqiang Wei
Nannan Yu
Source :
Multimedia Tools and Applications. 80:14409-14427
Publication Year :
2021
Publisher :
Springer Science and Business Media LLC, 2021.

Abstract

Fine-grained recognition is a very challenging issue, since it is difficulty to mine discriminative and subtle feature for objects with similar visual appearance. Because massive manual annotations (e.g., bounding box for discriminative regions) are time-consuming and labor-consuming, existing methods designed single form of attention model outputted discriminative regions in a weakly supervised way. In this paper, we proposed a novel method named a Spatial-Channel Aware Attention Filters (SCAF) to address the weakly supervised fine-grained recognition problem. Compared with the previous attention models, SCAF can obtain attentions-aware features from two dimensions, i.e., the spatial location of image and the channel of feature maps. With the proposed SCAF, the model can enhance the discriminative regions on both spatial and channel dimensions simultaneously. In addition, the multi-channel network multi-level structure are designed to extract richer regional features. Moreover, focal loss is introduced to balance the samples’ distribution of fine-grained image dataset. Comprehensive and comparable experiments are conducted in publicly available datasets, and the experimental results show that our method can achieve the state-of-the-art performance on fine-grained recognition tasks. For instance, we achieve 99.370%, 80.749% accuracy on two underwater datasets respectively, i.e., Fish4Knowlege and Wild Fish.

Details

ISSN :
15737721 and 13807501
Volume :
80
Database :
OpenAIRE
Journal :
Multimedia Tools and Applications
Accession number :
edsair.doi...........9ce1b2722d199865ba4d60017dc311fa