INSTRUCTIONS FOR RUNNING NSDCALC SOFTWARE Nsdcalc.m is a Matlab program for performing the image enhancement process described in the accompanying paper. Place the program in your work directory along with the demonstration data file grav.tx

由长度，方差生成用于图像分割的高斯匹配模板，用于匹配滤波增强，做图像分割。(The Gauss matching template for image segmentation is generated by length and variance, which is used for matching and filtering enhancement and image segmentation.)