sfrmat is a Matlab function that provides a spatial frequency response* (SFR) from a digital image file containing a slanted-edge feature. The specific edge-gradient algorithm follows the intent of the standard ISO 12233

sfr计算基于sfrmat2.0的基础上的升级版本，在原有基础上在边缘轮廓提取上进行优化升级-sfr calculated on the basis of an upgraded version of sfrmat2.0-based, based on the original optimized upgrade on the edge contour extraction