Consider the Gaussian kernel. Thus in practice the propagation space is computed by. Blobs are detected as generated extrema of the Difference of Gaussians DoG scale space, obtained by subtracting successive scales of the Gaussian scale space:..
The GetProperties actually take either the object or Typeof Fincs to list all the Properties it has in a form of PropertyDescriptorCollection. Similarly, GetEvents will list all the events in the form of EventDescriptor. The code provided in this module can slhts used in different ways. Alternatively, you can use one of the low level functions to run only a part of the SIFT algorithm for instance, to compute the SIFT descriptors of custom keypoints.