How to search the image for an object with SIFT and OpenCV?

Question

i am working on a simple playing card detecting programme. For now i have a working Sift Algorithmus from here. And i have created some bounding boxes around the cards. Then i u

Answer 1

Once you have the representation of the cards ready (what @nimcap says), you then you need to do the recognition itself. You can try nearest neighbors, SVM, etc.

Also, for a better description (more technical) of what to do you might want to look at Lowe's original 2004 SIFT paper.