Opencv Repeatability Result not make sense?

Question

i\'m trying to evaluate SIFT and SURF Detectors by Repeatability criteria.

i find out that below method can find Repeatability ,Correspondence of SIFT and SURF

Answer 1

In fact, OpenCV 2.49 uses this line of code in evaluation.cpp:

repeatability = minCount ? (float)correspondencesCount / minCount : -1;

which is the number of correspondences divided by the smaller number of Keypoint 1st or Keypoint 2th so I guess your error might be somewhere else. Can you post your complete code where you set img_1c, etc and call the function and display the results?