NDLI: A novel shadow restoration algorithm based on atmospheric effects for aerial images

Content Provider	IEEE Xplore Digital Library
Author	Aytekin, C. Alatan, A.A.
Copyright Year	2010
Description	Author affiliation: Electrical and Electronics Engineering Department, METU, Balgat 06531 Ankara TÜRKİYE (Aytekin, C.; Alatan, A.A.)
Abstract	In aerial images, the performance of the segmentation and object recognition algorithms could suffer due to shadows in the scene. This effort describes a novel shadow restoration algorithm based on atmospheric effects and characteristics of sun light for aerial images. Firstly, shadow regions are detected exploiting the Rayleigh scattering phenomena and the well-known fact related to the low illumination intensity in the shadow regions. After detection, shadow restoration is achieved by first restoring partially occluded shadow areas, as a result of modeling these transition regions with a continuous function that considers shadow formations. Next, fully occluded shadow regions are restored by first segmenting the image into multiple uniformly illuminated regions, then multiplying the intensity values in these regions with a constant, which is determined by the ratio of intensities between each segment and its non-shadow neighborhood. The simulation results indicate improvements over similar work from the literature.
Starting Page	401
Ending Page	404
File Size	723539
Page Count	4
File Format	PDF
ISBN	9781424479924
ISSN	15224880
e-ISBN	9781424479948
e-ISBN	9781424479931
DOI	10.1109/ICIP.2010.5653549
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-09-26
Publisher Place	Hong Kong
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Decision support systems Image processing Conferences scattering Shadow detection shadow restoration segmentation
Content Type	Text
Resource Type	Article

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