一种新的红外焦平面阵列盲元检测算法  

A New Algorithm of Blind Pixel Detection for Infrared Focal Array

作　　者：李丽萍[1] 袁祁刚[1] 朱华[1] 王旭[1] 周慧敏[1] 

机构地区：[1]西安北方光电科技防务有限公司,陕西西安710043

出　　处：《红外技术》2014年第2期106-109,共4页Infrared Technology

摘　　要：在分析盲元特性的基础上,依据形态学开闭运算对尖峰信号的滤波性质,提出了一种新的红外焦平面阵列盲元检测算法。选取合适的结构元素,运用开闭运算的滤波作用对图像进行平滑处理,从平滑图像中减去其均值得到阵列噪声响应图像,选取合适的图像均值的倍数作为检测阈值。对阵列图像进行开闭运算并与平滑图像取差后得到对过亮及过暗像素增强的图像,每个像素与阈值进行比较判别出盲元。A new algorithm of blind pixel detection for infrared focal array is presented according to filtering characteristic of morphologic open and close operations for acuminate signal based on analysis of blind pixel character. Smoothing image is obtained by means of filter character of open and close operations with proper structure element. The noise response image of the array is gained by subtracting the mean of all pixels from each pixel of the smoothing image. The mean is designated as threshold of defective pixels detection. Gray scale open and close operators are applied to the array respectively, then the outcome image subtracts the smoothing image to produce the image with enhanced over hot pixels and dead pixels. Each pixel is compared with the threshold, and blind pixels are differentiated.

关 键 词：红外焦平面阵列 盲元检测 数学形态学 滤波 

分 类 号：TN215[电子电信—物理电子学]