I would think an itk::NeighborhoodIterator with a radius of [1,1,1] would do. Are there any requirements other than direct adjacency to the neighborhood you want to traverse?
I haven't looked closely at the code but I think it's about as well optimized as it could be. -- Kent Williams [email protected] On 5/12/13 8:43 PM, "Gao, Yi" <[email protected]> wrote: >Dear all, > > >Could I have some suggestions on ways to fast access the nerighbors of a >set of random voxels? The scenario is as follows: > > >I have to access some voxels in the volume, these voxels are quite >randomly distributed. For each of them I know their (x, y, z) indexes. > >At each of these voxel, I need to access all its 26 neighbors. I want >this step to be faster. > > >So i'm hoping to have something like: > > >1. for each (x, y, z), I get the pointer to that voxel: ptr. > >2. For each of its neighbors, I use things like ptr[1], ptr[nx], ptr[1+ >nx*ny] to access (x+1, y, z), (x, y+1, z) and (x+1, y, z+1).... > > >Could I know if there is some good way to do that? > >Thank you in advance for any hint! > >Best, >yi > ________________________________ Notice: This UI Health Care e-mail (including attachments) is covered by the Electronic Communications Privacy Act, 18 U.S.C. 2510-2521, is confidential and may be legally privileged. If you are not the intended recipient, you are hereby notified that any retention, dissemination, distribution, or copying of this communication is strictly prohibited. Please reply to the sender that you have received the message in error, then delete it. Thank you. ________________________________ _______________________________________________ Powered by www.kitware.com Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html Kitware offers ITK Training Courses, for more information visit: http://kitware.com/products/protraining.php Please keep messages on-topic and check the ITK FAQ at: http://www.itk.org/Wiki/ITK_FAQ Follow this link to subscribe/unsubscribe: http://www.itk.org/mailman/listinfo/insight-developers
