一种新的基于平稳小波变换的红外焦平面非均匀性校正技术

在分析固定图案噪音频率分布的基础上,提出了一种利用平稳小波进行非均匀性校正的方法.选择合适的小波函数对红外图像序列进行分解,从而估计出非均匀性校正的增益和偏置系数,最终实现红外焦平面阵列的非均匀性校正.利用小波的多分辨性质,提高了低频部分的频率分辨率,有效的抑制了一般基于场景统计校正算法中易于出现的“人工鬼影”现象.用真实的红外图像序列进行了处理,实验证明了算法的优越性.

A New Correction Method of IRFPA Nonuniformity Based on Stationary Wavelet Transform

Based on the analysis of fixed pattern noise on the basis of frequency distribution,a correction method using stationary wavelet was proposed.The infrared image sequence was decomposed by a proper wavelet function,thereby the gain and offset coefficients were estimated and eventually the infrared focal plane array nonuniformity correction was realized.The resolution of low-frequency part was improved by the virtue of the wavelet with its multi-resolution properties,so the "artificial ghost" phenomenon which...