NDLI: Combining highlight removal and low-light image enhancement technique for HDR-like image generation

Content Provider	IET Digital Library
Author	Saha, Rappy Banik, Partha Pratim Gupta, Shantanu Sen Kim, Ki Doo
Abstract	Low dynamic range (LDR) image may contain low-light and highlight areas due to the limitations of the dynamic range of conventional image sensors. Low-light and highlight phenomena limit colour richness and visibility of objects in an image. Therefore, it can cause a reduction in the quality of images and a loss in accuracy in the application of image recognition. To overcome this, high dynamic range (HDR)-like images have been developed with rich colours such as those seen by the human eye. In this study, the authors propose a method to obtain an HDR-like image from a single LDR image by removing the specular component from highlight pixels as well as strengthening the actual colour. Next, they select low-light image enhancement via illumination map estimation as a low-light enhancement technique by showing the comparison with gamma-based expansion operator. They evaluate their HDR-like output images with non-reference and full-reference metrics. They show the comparison of their proposed method with six other methods. Besides, visually, their proposed method delivers more pleasing output than the output of other competitive methods.
Starting Page	1851
Ending Page	1861
Page Count	11
ISSN	17519659
Volume Number	14
e-ISSN	17519667
Issue Number	Issue 9, Jul (2020)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-ipr/14/9
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-ipr.2019.1099
Journal	IET Image Processing
Publisher Date	2020-03-02
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Actual Colour Computer Vision And Image Processing Technique Conventional Image Sensor HDR-like High Dynamic Range-like Image Highlight Areas Highlight Phenomena Limit Colour Richness Highlight Pixel Highlight Removal Image Colour Analysis Image Enhancement Image Processing Image Recognition Image Sonsor Low Dynamic Range Image Low-light Enhancement Technique Low-light Image Enhancement Technique Optical, Image And Video Signal Processing Rich Colours Single LDR Image
Content Type	Text
Resource Type	Article
Subject	Signal Processing Electrical and Electronic Engineering Computer Vision and Pattern Recognition Software

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