Correction of aeroheating-induced intensity nonuniformity in infrared images

被引:20
|
作者
Liu, Li [1 ]
Yan, Luxin [1 ]
Zhao, Hui [1 ]
Dai, Xiaobing [1 ]
Zhang, Tianxu [1 ]
机构
[1] Huazhong Univ Sci & Technol, Sch Automat, Natl Key Lab Sci & Technol Multispectral Informat, Wuhan 430074, Peoples R China
关键词
Infrared imaging; Intensity nonuniformity; Half quadratic; Image correction;
D O I
10.1016/j.infrared.2016.02.008
中图分类号
TH7 [仪器、仪表];
学科分类号
0804 ; 080401 ; 081102 ;
摘要
Aeroheating-induced intensity nonuniformity effects severely influence the effective performance of an infrared (IR) imaging system in high-speed flight. In this paper, we propose a new approach to the correction of intensity nonuniformity in IR images. The basic assumption is that the low-frequency intensity bias is additive and smoothly varying so that it can be modeled as a bivariate polynomial and estimated by using an isotropic total variation (TV) model. A half quadratic penalty method is applied to the isotropic form of TV discretization. And an alternating minimization algorithm is adopted for solving the optimization model. The experimental results of simulated and real aerothermal images show that the proposed correction method can effectively improve IR image quality. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码:235 / 241
页数:7
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