Variational Histogram Equalization for Single Color Image Defogging
Joint Authors
Bi, Du-Yan
Zhou, Li
He, Lin Yuan
Source
Mathematical Problems in Engineering
Issue
Vol. 2016, Issue 2016 (31 Dec. 2016), pp.1-17, 17 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2016-08-25
Country of Publication
Egypt
No. of Pages
17
Main Subjects
Abstract EN
Foggy images taken in the bad weather inevitably suffer from contrast loss and color distortion.
Existing defogging methods merely resort to digging out an accurate scene transmission in ignorance of their unpleasing distortion and high complexity.
Different from previous works, we propose a simple but powerful method based on histogram equalization and the physical degradation model.
By revising two constraints in a variational histogram equalization framework, the intensity component of a fog-free image can be estimated in HSI color space, since the airlight is inferred through a color attenuation prior in advance.
To cut down the time consumption, a general variation filter is proposed to obtain a numerical solution from the revised framework.
After getting the estimated intensity component, it is easy to infer the saturation component from the physical degradation model in saturation channel.
Accordingly, the fog-free image can be restored with the estimated intensity and saturation components.
In the end, the proposed method is tested on several foggy images and assessed by two no-reference indexes.
Experimental results reveal that our method is relatively superior to three groups of relevant and state-of-the-art defogging methods.
American Psychological Association (APA)
Zhou, Li& Bi, Du-Yan& He, Lin Yuan. 2016. Variational Histogram Equalization for Single Color Image Defogging. Mathematical Problems in Engineering،Vol. 2016, no. 2016, pp.1-17.
https://search.emarefa.net/detail/BIM-1112945
Modern Language Association (MLA)
Zhou, Li…[et al.]. Variational Histogram Equalization for Single Color Image Defogging. Mathematical Problems in Engineering No. 2016 (2016), pp.1-17.
https://search.emarefa.net/detail/BIM-1112945
American Medical Association (AMA)
Zhou, Li& Bi, Du-Yan& He, Lin Yuan. Variational Histogram Equalization for Single Color Image Defogging. Mathematical Problems in Engineering. 2016. Vol. 2016, no. 2016, pp.1-17.
https://search.emarefa.net/detail/BIM-1112945
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1112945