I have been using the SURF feature detector and trying to understand how it works. The usage of the SURF detector according to OpenCV 3 is --> surf->detectAndCompute(image, Mat(), keypoints, descriptors);
I want to know what exactly the Mat descriptors represent. On using imshow( ), a weird image with pixels of different gray scale intensities was shown. On printing to console, The matrix output ranged from different values like -0.65433e-05 etc.
Does anyone know what this represents?