NDLI: Multi-stage filtering for single rainy image enhancement

Content Provider	IET Digital Library
Author	Shi, Zhenghao Li, Yaowei Zhao, Minghua Feng, Yaning He, Lifeng
Abstract	Rain image enhancement is important for outdoor computer vision applications. In this study, the authors propose a multi-stage filtering method for single rainy image enhancement. It is based on their new rainy image model, and consists of two main operations: rain streaks removal and rain fog removal. For rain streaks removal, based on one key observation that the low-pass version of a rainy image and that of a non-rainy image of the same scene are almost the same after appropriate low-pass filtering, they remove rain streaks from rainy images by decomposing an input rainy image (or a rainy component image) into the low-frequency (LF) part and the high-frequency (HF) part via an LF smooth filter, i.e. the traditional Gaussian filter with a simple subtraction operation in multiple different stages. After rain streaks removal, dark channel prior-based method was employed for rain fog removal. Experimental results show that the proposed algorithm generated comparable outputs with most of the state-of-the-art algorithms with low computation cost.
Starting Page	1866
Ending Page	1872
Page Count	7
ISSN	17519659
Volume Number	12
e-ISSN	17519667
Issue Number	Issue 10, Oct (2018)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-ipr/12/10
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-ipr.2017.1022
Journal	IET Image Processing
Publisher Date	2018-05-24
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Computer Vision Computer Vision And Image Processing Technique Dark Channel Prior-based Method Filtering Method in Signal Processing Gaussian Filter Gaussian Processes Image Enhancement Image Filtering LF Smooth Filter Low-pass Filter Low-pass Filtering Multistage Filtering Optical, Image And Video Signal Processing Outdoor Computer Vision Application Rain Fog Removal Rain Streaks Removal Simple Subtraction Operation Single Rainy Image Enhancement Statistics
Content Type	Text
Resource Type	Article
Subject	Signal Processing Electrical and Electronic Engineering Computer Vision and Pattern Recognition Software

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