Ask Your Question

Revision history [back]

click to hide/show revision 1
initial version

How to use keypoints from another library to OpenCV?

I'm using the Fast SIFT Image Features Library, which is incredibly faster than the OpenCV implementation (approx 0.01 sec for keypoints and descriptors computations!).

This is the code about how keypoints+descriptor are created:

Image image = ReadPGM(stdin);
Keypoint keypts;
keypts = GetKeypoints(image);


typedef struct KeypointSt {
    float row, col;             // Subpixel location of keypoint.
    float scale, ori;           // Scale and orientation (range [-PI,PI])
    float descrip[128];     // Vector of descriptor values
    struct KeypointSt *next;    // Pointer to next keypoint in list.
} *Keypoint;

ReadPGM definition isn't relevant for this question.

So my question is: how can I use keypts obtained from the code above in OpenCV?