Single image dehazing for a variety of haze scenarios using back projected pyramid network

15 Aug 2020  ·  Ayush Singh, Ajay Bhave, Dilip K. Prasad ·

Learning to dehaze single hazy images, especially using a small training dataset is quite challenging. We propose a novel generative adversarial network architecture for this problem, namely back projected pyramid network (BPPNet), that gives good performance for a variety of challenging haze conditions, including dense haze and inhomogeneous haze... Our architecture incorporates learning of multiple levels of complexities while retaining spatial context through iterative blocks of UNets and structural information of multiple scales through a novel pyramidal convolution block. These blocks together for the generator and are amenable to learning through back projection. We have shown that our network can be trained without over-fitting using as few as 20 image pairs of hazy and non-hazy images. We report the state of the art performances on NTIRE 2018 homogeneous haze datasets for indoor and outdoor images, NTIRE 2019 denseHaze dataset, and NTIRE 2020 non-homogeneous haze dataset. read more

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Results from the Paper

Task Dataset Model Metric Name Metric Value Global Rank Result Benchmark
Image Dehazing Dense-Haze BPPNet SSIM 0.613 # 1
PSNR 17.01 # 1
Image Dehazing I-Haze BPPNet SSIM 0.8994 # 1
PSNR 22.56 # 1
Image Dehazing O-Haze BPPNet PSNR 24.27 # 1
SSIM 0.8919 # 1