利用opencv进行图像特征抽取，包括使用高斯滤波和sobel算子进行边缘提取，使用harris算法进行角点检测，使用hough变换找出图像中最长直线，使用Ranec算法找出图像中直线，Gabor滤波-Using opencv image feature extraction, including the use of Gaussian filtering and Sobel operator edge extraction, Harris algorithm corner detection,

角点检测算法是一种基于信号的点特征提取算法，Harris角点检测算子是通过Taylor级数展开法扩展了思路，计算窗口沿任何方向移动后的灰度变换情况，利用数学解析式来进一步确定特征点。-Corner detection algorithm is a point-based feature extraction algorithm signal, Harris corner detection operator is expanded by Taylor series expansion ideas

运用opencv编译Harris算子进行点特征提取，运行快，效果好-Opencv Harris