USLN: A statistically guided lightweight network for underwater image enhancement via dual-statistic white balance and multi-color space stretch

• URL: http://arxiv.org/abs/2209.02221v1
• Date: Tue, 6 Sep 2022 05:05:44 GMT
• Title: USLN: A statistically guided lightweight network for underwater image enhancement via dual-statistic white balance and multi-color space stretch
• Authors: Ziyuan Xiao, Yina Han, Susanto Rahardja, and Yuanliang Ma
• Abstract summary: We propose a statistically guided lightweight underwater image enhancement network (USLN) USLN learns to compensate the color distortion for each specific pixel. Experiments show that, with the guidance of statistics, USLN significantly reduces the required network capacity.
• Score: 7.169484500968534
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Underwater images are inevitably affected by color distortion and reduced contrast. Traditional statistic-based methods such as white balance and histogram stretching attempted to adjust the imbalance of color channels and narrow distribution of intensities a priori thus with limited performance. Recently, deep-learning-based methods have achieved encouraging results. However, the involved complicate architecture and high computational costs may hinder their deployment in practical constrained platforms. Inspired by above works, we propose a statistically guided lightweight underwater image enhancement network (USLN). Concretely, we first develop a dual-statistic white balance module which can learn to use both average and maximum of images to compensate the color distortion for each specific pixel. Then this is followed by a multi-color space stretch module to adjust the histogram distribution in RGB, HSI, and Lab color spaces adaptively. Extensive experiments show that, with the guidance of statistics, USLN significantly reduces the required network capacity (over98%) and achieves state-of-the-art performance. The code and relevant resources are available at https://github.com/deepxzy/USLN.

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