Revision history [back]

If you look at the documentation of match:

Finds the best match for each descriptor from a query set.

To recall the meaning of the descriptors dimension:

• each row contains the values of the descriptor for one keypoint
• the number of columns depends on the descriptor size which depends on the method used

So, for

descrip_1.size: 64x354

it means that you have 354 keypoints and the type of the descriptor used contains 64 values.

As you

Finds the best match for each descriptor from a query set.

you will have a list of matches with a size corresponding to the number of query keypoints.