Alternatively, you can use one of the low level gx to run only a part of the SIFT algorithm for compute, to compute the SIFT descriptors of custom keypoints. In order to run for image blobs at multiple scale, the SIFT detector construct a component space, defined as follows. Consider the Gaussian change. Thus in practice the scale space is computed by..
You cannot set the permission to read a certain attribute on the one hand and the permission caeual create a certain object class on the other hand in the sam access control entry. The reason for this is that only one scope specifier is allowed per ACE. For such cases, several different ACEs are necessary. If you try to set a casuaal permission combination on the checkboxes, the powerful Access Control Entry editor is shown where you can configure the regarding ACE in detail.