方向高斯滤波器，可以用于图像边缘检测和分析，倾角可以由用户给定-This program can be used to　uate the first directional derivative of an image. The orientation of the filter can be specified by the user. In general, these filters could be useful for edge detection and image analysis.



The filters created by this program are derived　the　steerable filters　presented in:



W. T. Freeman and E. H. Adelson,　The Design and Use of Steerable Filters , IEEE PAMI, 1991.