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Abstract
Image matting aims to estimate the opacity of foreground objects in order to accurately extract them from the background. Existing methods are only concerned with RGB features to obtain alpha mattes, limiting the perception of local tiny details. To address this issue, we introduce frequency information as an auxiliary clue to accurately distinguish foreground boundaries and propose theFrequencyMattingNetwork (FMN). Specifically, we deploy a Frequency Boosting Module (FBM) in addition to the Discrete Cosine Transform (DCT) to extract frequency information from input images. The proposed FBM is a learnable component that empowers the model to adapt to complex scenarios. Furthermore, we design a Domain Aggregation Module (DAM) to effectively fuse frequency features with RGB features. With the assistance of frequency clues, our proposed FMN achieves significant improvements in matting accuracy and visual quality compared with state-of-the-art methods. Extensive experiments on Composition-1k and Distinctions-646 datasets demonstrate the superiority of introducing frequency information for image matting.
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Authors and Affiliations
Key Laboratory of Image Processing and Intelligent Control, School of Artificial Intelligence and Automation, Huazhong University of Science and Technology, Wuhan, China
Rongsheng Luo, Changxin Gao & Nong Sang
Wuhan National Laboratory For Optoelectronics, Huazhong University of Science and Technology, Wuhan, China
Rukai Wei
- Rongsheng Luo
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- Rukai Wei
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- Changxin Gao
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- Nong Sang
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Correspondence toNong Sang.
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Editors and Affiliations
Kyushu Institute of Technology, Kitakyushu, Fukuoka, Japan
Huimin Lu
The University of Sydney, Sydney, NSW, Australia
Michael Blumenstein
Yonsei University, Seoul, Korea (Republic of)
Sung-Bae Cho
Chinese Academy of Sciences, Beijing, China
Cheng-Lin Liu
Osaka University, Osaka, Ibaraki, Japan
Yasushi Yagi
Kyushu Institute of Technology, Kitakyushu, Japan
Tohru Kamiya
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Luo, R., Wei, R., Gao, C., Sang, N. (2023). Frequency Information Matters for Image Matting. In: Lu, H., Blumenstein, M., Cho, SB., Liu, CL., Yagi, Y., Kamiya, T. (eds) Pattern Recognition. ACPR 2023. Lecture Notes in Computer Science, vol 14406. Springer, Cham. https://doi.org/10.1007/978-3-031-47634-1_7
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