CDI: Blind Image Restoration Fidelity Evaluation based on Consistency with Degraded Image

• URL: http://arxiv.org/abs/2501.14264v1
• Date: Fri, 24 Jan 2025 06:05:47 GMT
• Title: CDI: Blind Image Restoration Fidelity Evaluation based on Consistency with Degraded Image
• Authors: Xiaojun Tang, Jingru Wang, Guangwei Huang, Guannan Chen, Rui Zheng, Lian Huai, Yuyu Liu, Xingqun Jiang,
• Abstract summary: We reassess the Solution Non-Uniqueness and Degradation Indeterminacy issues of Blind Image Restoration (BIR) methods. We propose a specific BIR IQA system, which evaluates fidelity by calculating the Consistency with Degraded Image (CDI) In addition, we propose a Reference Agnostic CDI, enabling BIR fidelity evaluation without reference images.
• Score: 6.664998519426364
• License:
• Abstract: Recent advancements in Blind Image Restoration (BIR) methods, based on Generative Adversarial Networks and Diffusion Models, have significantly improved visual quality. However, they present significant challenges for Image Quality Assessment (IQA), as the existing Full-Reference IQA methods often rate images with high perceptual quality poorly. In this paper, we reassess the Solution Non-Uniqueness and Degradation Indeterminacy issues of BIR, and propose constructing a specific BIR IQA system. In stead of directly comparing a restored image with a reference image, the BIR IQA evaluates fidelity by calculating the Consistency with Degraded Image (CDI). Specifically, we propose a wavelet domain Reference Guided CDI algorithm, which can acquire the consistency with a degraded image for various types without requiring knowledge of degradation parameters. The supported degradation types include down sampling, blur, noise, JPEG and complex combined degradations etc. In addition, we propose a Reference Agnostic CDI, enabling BIR fidelity evaluation without reference images. Finally, in order to validate the rationality of CDI, we create a new Degraded Images Switch Display Comparison Dataset (DISDCD) for subjective evaluation of BIR fidelity. Experiments conducted on DISDCD verify that CDI is markedly superior to common Full Reference IQA methods for BIR fidelity evaluation. The source code and the DISDCD dataset will be publicly available shortly.

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