Open AccessDeblurring traffic sign images based on exemplars
Author(s) -
Houjie Li,
Tianshuang Qiu,
Shengyang Luan,
Haiyu Song,
Linxiu Wu
Publication year - 2018
Publication title -
plos one
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.99
H-Index - 332
ISSN - 1932-6203
DOI - 10.1371/journal.pone.0191367
Subject(s) - deblurring , artificial intelligence , computer science , pattern recognition (psychology) , entropy (arrow of time) , regularization (linguistics) , kernel (algebra) , sign (mathematics) , matching (statistics) , computer vision , mathematics , image (mathematics) , image restoration , image processing , statistics , mathematical analysis , physics , quantum mechanics , combinatorics
Motion blur appearing in traffic sign images may lead to poor recognition results, and therefore it is of great significance to study how to deblur the images. In this paper, a novel method for deblurring traffic sign is proposed based on exemplars and several related approaches are also made. First, an exemplar dataset construction method is proposed based on multiple-size partition strategy to lower calculation cost of exemplar matching. Second, a matching criterion based on gradient information and entropy correlation coefficient is also proposed to enhance the matching accuracy. Third, L 0.5 -norm is introduced as the regularization item to maintain the sparsity of blur kernel. Experiments verify the superiority of the proposed approaches and extensive evaluations against state-of-the-art methods demonstrate the effectiveness of the proposed algorithm.