Gated Context Aggregation Network for Image Dehazing and Deraining

21 Nov 2018  ·  Dongdong Chen, Mingming He, Qingnan Fan, Jing Liao, Liheng Zhang, Dongdong Hou, Lu Yuan, Gang Hua ·

Image dehazing aims to recover the uncorrupted content from a hazy image. Instead of leveraging traditional low-level or handcrafted image priors as the restoration constraints, e.g., dark channels and increased contrast, we propose an end-to-end gated context aggregation network to directly restore the final haze-free image. In this network, we adopt the latest smoothed dilation technique to help remove the gridding artifacts caused by the widely-used dilated convolution with negligible extra parameters, and leverage a gated sub-network to fuse the features from different levels. Extensive experiments demonstrate that our method can surpass previous state-of-the-art methods by a large margin both quantitatively and qualitatively. In addition, to demonstrate the generality of the proposed method, we further apply it to the image deraining task, which also achieves the state-of-the-art performance. Code has been made available at

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Results from the Paper

Task Dataset Model Metric Name Metric Value Global Rank Result Benchmark
Rain Removal DID-MDN GCANet PSNR 31.68 # 1
Image Dehazing RS-Haze GCANet PSNR 34.41 # 6
SSIM 0.949 # 5
Image Dehazing SOTS Indoor GCANet PSNR 30.23 # 25
SSIM 0.98 # 22