特征点提取/匹配

依赖opencv模块

opencv_core430d.lib
opencv_highgui430d.lib
opencv_imgproc430d.lib
opencv_imgcodecs430d.lib
opencv_videoio430d.lib
opencv_flann430d.lib（flan匹配）
opencv_features2d430d.lib（orb算法依赖）
opencv_calib3d430d.lib（计算透视变换矩阵）
opencv_xfeatures2d430d.lib（SURF特征提取）

opencv_core430d.dll
opencv_highgui430d.dll
opencv_imgproc430d.dll
opencv_imgcodecs430d.dll
opencv_videoio430d.dll
opencv_videoio_ffmpeg430_64.dll（没有该dll不能打开视频）
opencv_flann430d.dll
opencv_features2d430d.dll
opencv_calib3d430d.dll
opencv_xfeatures2d430d.dll

原理

运行项目

VS将FeaturePointDemo设为启动项目，f5调试

特征点提取

代码实现：extractFeatureDemo函数

演示

特征点匹配

暴力匹配

代码实现：bfMatch函数
设置了显示100个匹配点

flann匹配

代码实现：flannMatch函数
显示50个匹配点

orb匹配

代码实现：orb函数
匹配后图片宽度会超过屏幕显示宽度，而缩放图片会变形，所以不缩放

ORB特征点提取并绘制

ORB所有匹配点对

ORB优化后匹配点对