Similarly, GetEvents will give all the events in the form of EventDescriptor. The code single in this module can be used in different ways. Alternatively, you can use one of the low multiple functions to run only a part of the Scope algorithm for instance, to compute the SIFT properties of custom keypoints. In order to search for with blobs at multiple scale, the SIFT detector construct a scale space, defined as follows..
Thus in practice the scale space is computed by. Blobs are detected as local extrema of the Difference of Gaussians DoG scale space, obtained by subtracting successive scales of the Gaussian scale space:. At each next octave, the resolution of the images is halved to save computations.