Please note that the propagation could be blocked somewhere in the subtree of an object. Just td the Inherit permissions from parent objects option. If you do that, you can use whether you keep all the inherited entries as full entries, or if you want to remove all the different entries from the ACL. You can easily change the propagation you. Just click on the propagation label directly in the regarding row and choose the new propagation value from the pulldown list..
Thus in practice the scale space is computed by. Blobs are detected as local extrema of the Difference of Gaussians DoG scale space, obtained by subtracting successive scales of the Gaussian scale space:. At each next octave, the resolution of the images is halved to save computations. The images composing the Gaussian and DoG scale space can then be arranged as in the following figure:. Notice that the scale level index s varies in a slightly redundant set.