红外焦平面非均匀性噪声的空间频率特性及空间自适应非均匀性校正方法改进  

STUDY ON THE PROPERTY OF SPATIAL FREQUENCY OF NONUNIFORMITY NOISE IN IRFPA AND THE IMPROVEMENT OF SPATIAL ADAPTIVE NONUNIFORMITY CORRECTION TECHNIQUE

作　　者：张天序[1,2] 石岩[1,2] 曹治国[1,2] 

机构地区：[1]华中科技大学图像识别与人工智能研究所 [2]华中科技大学图像信息处理与智能控制教育部重点实验室,湖北武汉430074

出　　处：《红外与毫米波学报》2005年第4期255-260,共6页Journal of Infrared and Millimeter Waves

基　　金：国家自然科学基金重点资助项目(60135020)

摘　　要：分析了红外焦平面阵列非均匀性噪声的空间频率特性,指出空间低频噪声为其中的主要成分.利用实际IRF-PA定标数据,也得出了相同结论.针对传统空域自适应校正方法去除低频空间噪声存在的不足,本文提出采用一点校正和空域自适应校正相结合的方法.实验结果表明,新方法在空间低频噪声占优时能获得好的校正效果.The property of spatial frequency of the nonuniformity noise in IRFPA was studied. And the conclusion is that low frequency noise generally dominates the inherent IRFPA nonuniformity noise. The experiment with real IRFPA data demonstrates the same conclusion. To avoid the disadvantage of the traditional spatial adaptive nonuniformity correction denoising the low frequency dominated nonuniformity noise, a feasible approach for nonuniformity correction of IRFPA, which integrates one-point correction with spatial adaptive correction scheme, was proposed in this study. Experiments show that the proposed scheme can achieve good performance when low frequency noise is dominant.

关 键 词：红外焦平面阵列 非均匀性校正 自适应 空间频率 

分 类 号：TN215[电子电信—物理电子学]