POINT SPREADING FUNCTION ESTIMATION METHOD AND SYSTEM

摘要

The present invention provides a point spreading function estimation method and system. The method comprises: performing scanning imaging on multiple closely arranged rectangular blocks of a same size by using a scanning apparatus, manufacturing materials and/or mass thicknesses of the multiple rectangular blocks being different, the incident angle of rays during scanning imaging being perpendicular to the scanning direction, and the incident angle of the rays being perpendicular to a surface on which the multiple rectangular blocks are closely arranged; obtaining line spreading functions in length and width directions of the rectangular blocks according to a scanned image, and respectively obtaining standard deviation parameters of the line spreading functions; and combining the standard deviation parameters in the two directions to obtain a parameter for a two-dimensional point spreading function, to estimate the point spreading function. The present invention features a high degree of automation and a fast execution speed.