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• W2980959747 abstract "Blur is one of the most common distortions that degrade natural images. This stimulates the blossom of sharpness assessment metrics. Existing sharpness metrics possess good performance for evaluating simulated blur, but are limited for the more common realistic blur that are introduced during image capture and processing in real life. To this end, we propose an effective Realistic Blur Assessment method (RBA) based on discrepancy learning. First, motivated by the fact that the distortion-free reference images are usually unavailable in practice, but the Human Visual System (HVS) can still accurately perceive image sharpness by quantifying the perceptual discrepancy between the distorted image and the hallucinated reference image in mind, we propose to train a discrepancy generation model to automatically generate the discrepancy map from the distorted image analogous to the HVS. This is achieved by using a deep neural network with rich training images. With the discrepancy map, two sharpness-aware features, i.e. sparse representation based entropy of primitive and content-guided variation of power, are then extracted to severally quantify spatial visual information amount and spectral power. Finally, the two features are integrated to produce the overall sharpness score. Extensive experiments demonstrate the superiority of the proposed method over the state-of-the-arts." @default.
• W2980959747 created "2019-10-25" @default.
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• W2980959747 date "2020-11-01" @default.
• W2980959747 modified "2023-10-11" @default.
• W2980959747 title "Blind Realistic Blur Assessment Based on Discrepancy Learning" @default.
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• W2980959747 doi "https://doi.org/10.1109/tcsvt.2019.2947450" @default.
• W2980959747 hasPublicationYear "2020" @default.
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