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Multiframe Superresolution of Vehicle License Plates Based on Distribution Estimation Approach
Joint Authors
Zhao, Shengrong
Jin, Renchao
Xu, Xiangyang
Song, Enmin
Source
Journal of Control Science and Engineering
Issue
Vol. 2016, Issue 2016 (31 Dec. 2016), pp.1-19, 19 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2016-04-19
Country of Publication
Egypt
No. of Pages
19
Main Subjects
Electronic engineering
Information Technology and Computer Science
Abstract EN
Low-resolution (LR) license plate images or videos are often captured in the practical applications.
In this paper, a distribution estimation based superresolution (SR) algorithm is proposed to reconstruct the license plate image.
Different from the previous work, here, the high-resolution (HR) image is estimated via the obtained posterior probability distribution by using the variational Bayesian framework.
To regularize the estimated HR image, a feature-specific prior model is proposed by considering the most significant characteristic of license plate images; that is, the target has high contrast with the background.
In order to assure the success of the SR reconstruction, the models representing smoothness constraints on images are also used to regularize the estimated HR image with the proposed feature-specific prior model.
We show by way of experiments, under challenging blur with size 7 × 7 and zero-mean Gaussian white noise with variances 0.2 and 0.5, respectively, that the proposed method could achieve the peak signal-to-noise ratio (PSNR) of 22.69 dB and the structural similarity (SSIM) of 0.9022 under the noise with variance 0.2 and the PSNR of 19.89 dB and the SSIM of 0.8582 even under the noise with variance 0.5, which are 1.84 dB and 0.04 improvements in comparison with other methods.
American Psychological Association (APA)
Jin, Renchao& Zhao, Shengrong& Xu, Xiangyang& Song, Enmin. 2016. Multiframe Superresolution of Vehicle License Plates Based on Distribution Estimation Approach. Journal of Control Science and Engineering،Vol. 2016, no. 2016, pp.1-19.
https://search.emarefa.net/detail/BIM-1107893
Modern Language Association (MLA)
Jin, Renchao…[et al.]. Multiframe Superresolution of Vehicle License Plates Based on Distribution Estimation Approach. Journal of Control Science and Engineering No. 2016 (2016), pp.1-19.
https://search.emarefa.net/detail/BIM-1107893
American Medical Association (AMA)
Jin, Renchao& Zhao, Shengrong& Xu, Xiangyang& Song, Enmin. Multiframe Superresolution of Vehicle License Plates Based on Distribution Estimation Approach. Journal of Control Science and Engineering. 2016. Vol. 2016, no. 2016, pp.1-19.
https://search.emarefa.net/detail/BIM-1107893
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1107893