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Content Provider | IET Digital Library |
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Author | Fu, Qingxu Di, Xiaoguang Zhang, Yu |
Abstract | Low-light images suffer from severe noise and low illumination. In this work, the authors propose an adaptive low-light raw image enhancement network to avoid parameter-handcrafting in current deep learning models and to improve image quality. The proposed method can be divided into two sub-models: brightness prediction and exposure shifting (ES). The former is designed to control the brightness of the resulting image by estimating a guideline exposure time t 1 . The latter learns to approximate an exposure-shifting operator ES, converting a low-light image with real exposure time t 0 to a noise-free image with guideline exposure time t 1 . Additionally, structural similarity loss and image enhancement vector are introduced to promote image quality, and a new campus image data set (CID) for training the proposed model is proposed to overcome the limitations of the existing data sets. In quantitative tests, it is shown that the proposed method has the lowest noise level estimation score compared with the state-of-the-art low-light algorithms, suggesting a superior denoising performance. Furthermore, those tests illustrate that the proposed method is able to adaptively control the global image brightness according to the content of the image scene. Lastly, the potential application in video processing is briefly discussed. |
Starting Page | 3433 |
Ending Page | 3443 |
Page Count | 11 |
ISSN | 17519659 |
Volume Number | 14 |
e-ISSN | 17519667 |
Issue Number | Issue 14, Dec (2020) |
Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/iet-ipr/14/14 |
Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/10.1049/iet-ipr.2020.0100 |
Journal | IET Image Processing |
Publisher Date | 2020-08-24 |
Access Restriction | Open |
Rights Holder | © The Institution of Engineering and Technology |
Subject Keyword | Adaptive Model Brightness Brightness Prediction Campus Image Data Computer Vision And Image Processing Technique Current Deep Learning Model ES Exposure-shifting Operator Global Image Brightness Guideline Exposure Time High-quality Low-light Image Enhancement Image Denoising Image Enhancement Image Enhancement Vector Image Quality Image Reconstruction Image Resolution Image Scene Knowledge Engineering Technique Learning in AI Low Illumination Low-light Raw Image Enhancement Network Low-light Raw Image Processing Lowest Noise Level Estimation Score Noise-free Image Optical, Image And Video Signal Processing Real-world Image Severe Noise Single Raw Image Structural Similarity Loss |
Content Type | Text |
Resource Type | Article |
Subject | Signal Processing Electrical and Electronic Engineering Computer Vision and Pattern Recognition Software |
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