Proxies for Distortion and Consistency with Applications for Real-World Image Restoration

• URL: http://arxiv.org/abs/2501.12102v1
• Date: Tue, 21 Jan 2025 12:49:30 GMT
• Title: Proxies for Distortion and Consistency with Applications for Real-World Image Restoration
• Authors: Sean Man, Guy Ohayon, Ron Raphaeli, Michael Elad,
• Abstract summary: This paper offers a suite of tools that can serve both the design and assessment of real-world image restoration algorithms. We propose a trained model that predicts the chain of degradations a given real-world measured input has gone through. We show how this estimator can be used to approximate the consistency -- the match between the measurements and any proposed recovered image.
• Score: 12.118301237297313
• License:
• Abstract: Real-world image restoration deals with the recovery of images suffering from an unknown degradation. This task is typically addressed while being given only degraded images, without their corresponding ground-truth versions. In this hard setting, designing and evaluating restoration algorithms becomes highly challenging. This paper offers a suite of tools that can serve both the design and assessment of real-world image restoration algorithms. Our work starts by proposing a trained model that predicts the chain of degradations a given real-world measured input has gone through. We show how this estimator can be used to approximate the consistency -- the match between the measurements and any proposed recovered image. We also use this estimator as a guiding force for the design of a simple and highly-effective plug-and-play real-world image restoration algorithm, leveraging a pre-trained diffusion-based image prior. Furthermore, this work proposes no-reference proxy measures of MSE and LPIPS, which, without access to the ground-truth images, allow ranking of real-world image restoration algorithms according to their (approximate) MSE and LPIPS. The proposed suite provides a versatile, first of its kind framework for evaluating and comparing blind image restoration algorithms in real-world scenarios.

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