Abstract
Lighter model and faster inference are the focus of current single image super-resolution (SISR) research. However, existing methods are still hard to be applied in real-world applications due to the heavy computation requirement. Model quantization is an effective way to significantly reduce model size and computation time. In this work, we investigate the binary neural network-based SISR problem and propose a novel model binarization method. Specially, we design a bit-accumulation mechanism (BAM) to approximate the full-precision convolution with a value accumulation scheme, which can gradually refine the precision of quantization along the direction of model inference. In addition, we further construct an efficient model structure based on the BAM for lower computational complexity and parameters. Extensive experiments show the proposed model outperforms the state-of-the-art binarization methods by large margins on 4 benchmark datasets, specially by average more than 0.7 dB in terms of Peak Signal-to-Noise Ratio on Set5 dataset.
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Acknowledgement
This work was supported in part by the National Key Research and Development Program of China under Grant 2018AAA0103202, in part by the National Natural Science Foundation of China under Grant 61922066, Grant 61876142, Grant 61671339, Grant 61772402, Grant 62036007, and Grant U1605252, in part by the National High-Level Talents Special Support Program of China under Grant CS31117200001, in part by the Fundamental Research Funds for the Central Universities under Grant JB190117, in part by the Xidian University Intellifusion Joint Innovation Laboratory of Artificial Intelligence, and in part by the Innovation Fund of Xidian University.
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Xin, J., Wang, N., Jiang, X., Li, J., Huang, H., Gao, X. (2020). Binarized Neural Network for Single Image Super Resolution. In: Vedaldi, A., Bischof, H., Brox, T., Frahm, JM. (eds) Computer Vision – ECCV 2020. ECCV 2020. Lecture Notes in Computer Science(), vol 12349. Springer, Cham. https://doi.org/10.1007/978-3-030-58548-8_6
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