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MultiCAM: Multiple Class Activation Mapping for Aircraft Recognition in Remote Sensing Images
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MultiCAM: Multiple Class Activation Mapping for Aircraft Recognition in Remote Sensing Images
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MultiCAM: Multiple Class Activation Mapping for Aircraft Recognition in Remote Sensing Images
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Journal Article
MultiCAM: Multiple Class Activation Mapping for Aircraft Recognition in Remote Sensing Images
2019
Overview
Aircraft recognition in remote sensing images has long been a meaningful topic. Most related methods treat entire images as a whole and do not concentrate on the features of parts. In fact, a variety of aircraft types have small interclass variance, and the main evidence for classifying subcategories is related to some discriminative object parts. In this paper, we introduce the idea of fine-grained visual classification (FGVC) and attempt to make full use of the features from discriminative object parts. First, multiple class activation mapping (MultiCAM) is proposed to extract the discriminative parts of aircrafts of different categories. Second, we present a mask filter (MF) strategy to enhance the discriminative object parts and filter the interference of the background from original images. Third, a selective connected feature fusion method is proposed to fuse the features extracted from both networks, focusing on the original images and the results of MF, respectively. Compared with the single prediction category in class activation mapping (CAM), MultiCAM makes full use of the predictions of all categories to overcome the wrong discriminative parts produced by a wrong single prediction category. Additionally, the designed MF preserves the object scale information and helps the network to concentrate on the object itself rather than the interfering background. Experiments on a challenging dataset prove that our method can achieve state-of-the-art performance.
Publisher
MDPI AG
