NoiSER: Noise is All You Need for Enhancing Low-Light Images Without Task-Related Data

• URL: http://arxiv.org/abs/2211.04700v1
• Date: Wed, 9 Nov 2022 06:18:18 GMT
• Title: NoiSER: Noise is All You Need for Enhancing Low-Light Images Without Task-Related Data
• Authors: Zhao Zhang, Suiyi Zhao, Xiaojie Jin, Mingliang Xu, Yi Yang, Shuicheng Yan
• Abstract summary: We show that it is possible to enhance a low-light image without any task-related training data. Technically, we propose a new, magical, effective and efficient method, termed underlineNoise underlineSElf-underlineRegression (NoiSER) Our NoiSER is highly competitive to current task-related data based LLIE models in terms of quantitative and visual results.
• Score: 103.04999391668753
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: This paper is about an extraordinary phenomenon. Suppose we don't use any low-light images as training data, can we enhance a low-light image by deep learning? Obviously, current methods cannot do this, since deep neural networks require to train their scads of parameters using copious amounts of training data, especially task-related data. In this paper, we show that in the context of fundamental deep learning, it is possible to enhance a low-light image without any task-related training data. Technically, we propose a new, magical, effective and efficient method, termed \underline{Noi}se \underline{SE}lf-\underline{R}egression (NoiSER), which learns a gray-world mapping from Gaussian distribution for low-light image enhancement (LLIE). Specifically, a self-regression model is built as a carrier to learn a gray-world mapping during training, which is performed by simply iteratively feeding random noise. During inference, a low-light image is directly fed into the learned mapping to yield a normal-light one. Extensive experiments show that our NoiSER is highly competitive to current task-related data based LLIE models in terms of quantitative and visual results, while outperforming them in terms of the number of parameters, training time and inference speed. With only about 1K parameters, NoiSER realizes about 1 minute for training and 1.2 ms for inference with 600$\times$400 resolution on RTX 2080 Ti. Besides, NoiSER has an inborn automated exposure suppression capability and can automatically adjust too bright or too dark, without additional manipulations.

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