一种简单而高效的在二值图像中检测目标物体直线边界的算法-A simple and efficient binary image in the detection of target objects in a straight line boundary algorithm

Design and Use of Steerable Filters PAMI1991文章的代码，含有测试图像和demo，可运行-It implements a steerable Gaussian filter. This m-file can be used to evaluate the first directional derivative of an image, using the method outlined in: W. T. Freeman and E. H.