Chinese Optics Letters, 2011, 9 (3): 031101, Published Online: Mar. 4, 2011
A new analytical edge spread function fitting model for modulation transfer function measurement Download: 923次
调制传递函数 边缘扩散函数 线扩散函数 非线性最小二乘法 反卷积 110.4100 Modulation transfer function 110.2960 Image analysis 100.2000 Digital image processing 100.1830 Deconvolution
Abstract
We propose a new analytical edge spread function (ESF) fitting model to measure the modulation transfer function (MTF). The ESF data obtained from a slanted-edge image are fitted to our model through the non-linear least squares (NLLSQ) method. The differentiation of the ESF yields the line spread function (LSF), the Fourier transform of which gives the profile of two-dimensional MTF. Compared with the previous methods, the MTF estimate determined by our method conforms more closely to the reference. A practical application of our MTF measurement in degraded image restoration also validates the accuracy of our model.
Tiecheng Li, Huajun Feng, Zhihai Xu. A new analytical edge spread function fitting model for modulation transfer function measurement[J]. Chinese Optics Letters, 2011, 9(3): 031101.