StyleAM: Perception-Oriented Unsupervised Domain Adaption for Non-reference Image Quality Assessment

• URL: http://arxiv.org/abs/2207.14489v1
• Date: Fri, 29 Jul 2022 05:51:18 GMT
• Title: StyleAM: Perception-Oriented Unsupervised Domain Adaption for Non-reference Image Quality Assessment
• Authors: Yiting Lu and Xin Li and Jianzhao Liu and Zhibo Chen
• Abstract summary: We propose an effective perception-oriented unsupervised domain adaptation method StyleAM for NR-IQA. StyleAM transfers sufficient knowledge from label-rich source domain data to label-free target domain images via Style Alignment and Mixup. Experiments on two typical cross-domain settings have demonstrated the effectiveness of our proposed StyleAM on NR-IQA.
• Score: 23.289183622856704
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Deep neural networks (DNNs) have shown great potential in non-reference image quality assessment (NR-IQA). However, the annotation of NR-IQA is labor-intensive and time-consuming, which severely limits their application especially for authentic images. To relieve the dependence on quality annotation, some works have applied unsupervised domain adaptation (UDA) to NR-IQA. However, the above methods ignore that the alignment space used in classification is sub-optimal, since the space is not elaborately designed for perception. To solve this challenge, we propose an effective perception-oriented unsupervised domain adaptation method StyleAM for NR-IQA, which transfers sufficient knowledge from label-rich source domain data to label-free target domain images via Style Alignment and Mixup. Specifically, we find a more compact and reliable space i.e., feature style space for perception-oriented UDA based on an interesting/amazing observation, that the feature style (i.e., the mean and variance) of the deep layer in DNNs is exactly associated with the quality score in NR-IQA. Therefore, we propose to align the source and target domains in a more perceptual-oriented space i.e., the feature style space, to reduce the intervention from other quality-irrelevant feature factors. Furthermore, to increase the consistency between quality score and its feature style, we also propose a novel feature augmentation strategy Style Mixup, which mixes the feature styles (i.e., the mean and variance) before the last layer of DNNs together with mixing their labels. Extensive experimental results on two typical cross-domain settings (i.e., synthetic to authentic, and multiple distortions to one distortion) have demonstrated the effectiveness of our proposed StyleAM on NR-IQA.

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