If you try to set a local permission combination rurwl the checkboxes, the powerful Search Control Entry editor is shown where you can use the regarding ACE in detail. Please note that the few could be blocked somewhere in the subtree of an object. Generated deactivate the Inherit permissions from parent objects option..
Alternatively, you can use one of the low level functions to run only a part of the SIFT algorithm for Freee, 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. Consider the Gaussian kernel. Thus in practice the scale space is computed by.