I hope you could use the propagation later while building your library. TypeDescriptor is a certain sealed class which makes the starting point of the API. It objects information of the object in terms of Properties, Attributes, Events, etc..
The images composing the Gaussian and DoG scale space can ssilver be arranged as in the following figure:. Notice that the scale level index s varies in a slightly redundant set. Once extracted, local extrema are quadratically interpolated this is very important especially at the lower resolution scales in order to have accurate keypoint localization at the full resolution.