点扩散函数的改进倾斜刃边重建的高精度估计

摘要

基于现有刃边法提出了一种不受刃边倾角限制的点扩散函数高精度估计算法，通过改进刃边拟合、样本去噪与防走样重采样优化边缘扩散函数重建过程，并采用高斯函数拟合点扩散函数得到高精度PSF 估值。试验表明，相较于现有刃边法，本文方法的估计精度与稳定性有显著提高。%A high accurate estimation algorithm for point spread function which is free from edge slant angle is proposed.In this algorithm,high accuracy estimation of point spread function is gained by improved edge l ine fitting,sample denosing and anti-al iasing resampl ing.Compared with the existing slanted edge methods,the new method yields a significant improvement in accuracy and stabi l ity.