TypeDescriptor is a certain sealed class which makes the starting point of the API. It columns information of the object in terms of Properties, Attributes, Events, etc. As though the basic usage of TypeDescriptor is to get metadata of an little, yet it also exposes features to extend the object on the fly..
In order to search for image blobs at multiple scale, the SIFT detector construct a scale space, defined as follows. Consider the Gaussian kernel. Thus in practice the scale space is computed by.