我正在尝试计算视频中两个连续帧之间的仿射变换。因此,我已经找到了这两帧中的特征点,并得到了它们的匹配点。
最后一行出现以下错误:
FastFeatureDetector detector;
vector<Keypoints> frame1_features;
vector<Keypoints> frame2_features;
detector.detect(frame1 , frame1_features , Mat());
detector.detect(frame2 , frame2_features , Mat());
vector<Point2f> features1; //matched points in 1st image
vector<Point2f> features2; //matched points in 2nd image
for(int i = 0;i<frame2_features.size() && i<frame1_features.size();++i )
{
double diff;
diff = pow((frame1.at<uchar>(frame1_features[i].pt) - frame2.at<uchar>(frame2_features[i].pt)) , 2);
if(diff<SSD) //SSD is sum of squared differences between two image regions
{
feature1.push_back(frame1_features[i].pt);
feature2.push_back(frame2_features[i].pt);
}
}
Mat affine = getAffineTransform(features1 , features2);
最后一行出现以下错误:
OpenCV Error: Assertion failed (src.checkVector(2, CV_32F) == 3 && dst.checkVector(2, CV_32F) == 3) in getAffineTransform
请问有人能告诉我如何使用两个帧之间的匹配点计算仿射变换吗?