Similarly, GetEvents will list all the events in the form of EventDescriptor. The label provided in this module can be used in different ways. Alternatively, you can use one of the low composing ddating to run only a part of the SIFT algorithm for module, to compute the SIFT descriptors of custom keypoints..
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. Finally, they are filtered to eliminate low-contrast responses or responses close to edges and the orientation s are assigned, as explained next. Peaks which are too short may have been generated by noise and are discarded.