基于人眼视觉特性的IRFPA非均匀性校正算法研究  

Research on IRFPA Non-uniformity Correction Algorithm Based on Human Visual Characteristics

作　　者：代少升[1] 易伟男 聂合文 杨雨 DAI Shaosheng;YI Weinan;NIE Hewen;YANG Yu(Chongqing Key Lab.of Signal and Information Processing.Chongqing University of Posts and Telecommun.,Chongqing 400065,CHN)

机构地区：[1]重庆邮电大学信号与信息处理重庆市重点实验室,重庆400065

出　　处：《半导体光电》2020年第1期59-63,67,共6页Semiconductor Optoelectronics

摘　　要：红外焦平面器件普遍存在着非均匀性问题,对红外焦平面阵列(IRFPA)实施非均匀性校正对提高成像质量具有重要意义。传统的IRFPA多点校正算法存在运算量大、实时性能低、实用效果差等问题,为此文章综合人眼视觉特性,提出IRFPA非均匀性多点校正算法。人眼视觉对图像的灰度分辨能力是有阈值限制的,利用这种分辨阈值可以对IRFPA的标定点进行有效压缩,生成像元号-校正系数表,然后通过查找系数表,实现IRFPA的非均匀性实时压缩校正。实验证明,提出的IRFPA非均匀性校正算法较传统的IRFPA非均匀性校正算法实时性能更好,非均匀性降低了0.203%。Infrared focal plane devices generally present non-uniformity problems,and implementing non-uniformity correction on IRFPA is of great significance for improving image quality.The traditional IRFPA multi-point correction algorithm is of such problems as large amount of computation,low real-time performance and poor practical effect.Therefore,combining with the human visual characteristics,a multi-point correction method is proposed for IRFPA non-uniformity.The human eye vision has a threshold limitation on the gray resolution capability of the image,and with this resolution threshold,the calibration point of the IRFPA can be effectively compressed to generate a pixel number-correction coefficient table.Then,the IRFPA non-uniformity real-time compression correction can be implemented by looking up the coefficient table.The experimental results show that the proposed algorithm has better real-time performance than traditional algorithms,and the non-uniformity is reduced by 0.203%.

关 键 词：IRFPA 非均匀性校正 人眼视觉特性 多点校正 DSP 

分 类 号：TN215[电子电信—物理电子学]