摘要
在研究红外焦平面阵列(Infrared Focal Plane Array,IRFPA)非均匀性校正算法的过程中,需要通过仿真获取大量带有非均匀性信息的目标图像。根据IRFPA非均匀性的产生机理,分别建立了探测元非均匀性、读出电路非均匀性和漂移噪声的数学模型,并利用这些模型在理想图像上分别叠加了这三部分的非均匀性,最终获取了目标图像。在仿真过程中,假设非均匀性噪声符合高斯分布,通过设置模型系数使其具有不同的均值和方差,可以实现不同程度的非均匀性仿真。由于考虑了漂移噪声,本文方法的仿真结果更为符合实际情况。
During the study of nonuniformity correction algorithms for Infrared Focal Plane Arrays （IRFPA）, a large number of target images containing nonuniformity information need to be obtained by simulation. According to the generation mechanism of nonuniformity of IRFPAs, a detection element nonuniformity model, a readout circuit nonuniformity model and a drift noise model are established respectively. By superposing the nonuniformity of the three models on the ideal image respectively, the target image is obtained eventually. In the process of simulation, it is assumed that the nonuniformity noise obeys the Gaussian distribution. By setting the model coefficients with different mean and variant, different degrees of nonuniformity simulation can be achieved. Because the drift noise is considered, the simulation results of the proposed method are more consistent to actual situation.
出处
《红外》
CAS
2015年第9期1-5,共5页
Infrared
基金
国家自然科学基金项目(61303192)
关键词
非均匀性
探测元
读出电路
漂移噪声
nonuniformity
detector element
readout circuit
drift noise
