In order to search for image blobs at multiple scale, the SIFT detector construct a component space, defined as follows. Consider the Gaussian access. Thus in practice the scale space is computed by..
The GetProperties actually take either the object or Typeof object 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 be 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.
In order to search for image blobs at multiple scale, the SIFT detector construct a scale space, defined as follows.