UIF: An Objective Quality Assessment for Underwater Image Enhancement

• URL: http://arxiv.org/abs/2205.09392v1
• Date: Thu, 19 May 2022 08:43:47 GMT
• Title: UIF: An Objective Quality Assessment for Underwater Image Enhancement
• Authors: Yannan Zheng, Weiling Chen, Rongfu Lin, Tiesong Zhao
• Abstract summary: We propose an Underwater Image Fidelity (UIF) metric for objective evaluation of enhanced underwater images. By exploiting the statistical features of these images, we present to extract naturalness-related, sharpness-related, and structure-related features. Experimental results confirm that the proposed UIF outperforms a variety of underwater and general-purpose image quality metrics.
• Score: 17.145844358253164
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Due to complex and volatile lighting environment, underwater imaging can be readily impaired by light scattering, warping, and noises. To improve the visual quality, Underwater Image Enhancement (UIE) techniques have been widely studied. Recent efforts have also been contributed to evaluate and compare the UIE performances with subjective and objective methods. However, the subjective evaluation is time-consuming and uneconomic for all images, while existing objective methods have limited capabilities for the newly-developed UIE approaches based on deep learning. To fill this gap, we propose an Underwater Image Fidelity (UIF) metric for objective evaluation of enhanced underwater images. By exploiting the statistical features of these images, we present to extract naturalness-related, sharpness-related, and structure-related features. Among them, the naturalness-related and sharpness-related features evaluate visual improvement of enhanced images; the structure-related feature indicates structural similarity between images before and after UIE. Then, we employ support vector regression to fuse the above three features into a final UIF metric. In addition, we have also established a large-scale UIE database with subjective scores, namely Underwater Image Enhancement Database (UIED), which is utilized as a benchmark to compare all objective metrics. Experimental results confirm that the proposed UIF outperforms a variety of underwater and general-purpose image quality metrics.

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