将关键点 vector 转换为 CvSeq

Question

我有一个快速的 OpenCV 问题。是否可以采用关键点 vector 并将其转换为 CvSeq？

提前致谢。

Answer 1

我不知道你为什么想要那个，但它应该是可能的，有了这些功能你可以做任何你想做的事:

我应该补充一点，下面是 C 和 C++ 的混合(在 OpenCV 中也是如此)

CreateSeqCvSeq* cvCreateSeq(int seqFlags, int headerSize, int elemSize, CvMemStorage* 存储)

SeqPushchar* cvSeqPush(CvSeq* seq, void* element=NULL)

这是代码，我还没有尝试过，如果有错误请告诉我，是否有效，我只是试了一下...

vector<KeyPoint> myKeypointVector; //Your KeyPoint vector
// Do whatever you want with your vector

CvMemStorage* storage = cvCreateMemStorage(0) 
// By default the flag 0 is 64K 
// but myKeypointVector.size()*(sizeof(KeyPoint)+sizeof(CvSeq)) should work
// it may be more efficient but be careful there may have seg fault 
// (not sure about the size

CvSeq* myKeypointSeq = cvCreateSeq(0,sizeof(CvSeq),sizeof(KeyPoint),storage);
// Create the seq at the location storage

for (size_t i=0; myKeypointVector.size(); i++) {
    int* added = (int*)cvSeqPush(myKeypointSeq,&(myKeypointVector[i]));
    // Should add the KeyPoint in the Seq
}

cvClearMemStorage( storage ); 
cvReleaseMemStorage(&storage); 

朱利安