摘要
调制传递函数(MTF)被广泛用于定性和定量地描述一个光学成像系统成像本领。事实上有多种不同的方法可以获取成像系统的MTF。提出了一种新型线扩展函数(LSF)拟合模型用于计算MTF。函数模型中的各个参数可以使用非线性最小二乘法来确定。与以前提出的函数模型相比,不论在何种噪声条件下,该函数模型的MTF计算结果总与参考值最为接近。使用该函数模型计算退化图像的MTF,并将其应用于降质图像的复原,实验结果证明了计算值的可靠性和用于图像复原时的有效性。
The modulation transfer function（MTF） has been widely used to characterize and quantify the spatial resolution of a linear and space-invariant imaging system.Various methods have been proposed to determine the MTF of an imaging system.A new analytical line spread function（LSF） fitting model to calculate the MTF is proposed.The LSF parameters are confirmed by means of a nonlinear least-square fitting technique.Compared with previous models,the MTF estimate based on proposed model shows the lowest error in the presence of different noise.A practical application of MTF measurement in degraded image restoration also validates the accuracy of proposed method.
出处
《光学学报》
EI
CAS
CSCD
北大核心
2010年第12期3454-3459,共6页
Acta Optica Sinica
基金
国家自然科学基金(60977010)
国家973计划(2009CB724006)
国家863计划(2009AA12Z108)资助课题
