# Multi-resolution Demons Registration

**URL:** https://discourse.itk.org/t/multi-resolution-demons-registration/3981
**Category:** Engineering
**Tags:** registration
**Created:** [March 24, 2021, 8:57pm UTC](https://discourse.itk.org/t/multi-resolution-demons-registration/3981 "2021-03-24T20:57:41Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![hfeng](https://discourse.itk.org/letter_avatar_proxy/v4/letter/h/b5ac83/32.png) [@hfeng](https://discourse.itk.org/u/hfeng)
#### Post date: [March 24, 2021, 8:57pm UTC](https://discourse.itk.org/t/multi-resolution-demons-registration/3981/1 "2021-03-24T20:57:41Z")

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Hi, I am trying to do the deformable image registration using demons, simply extending the example “DeformableRegistration16.cxx” to 3d images.  
A multi-resolution scheme is used here with 4 levels. Where can I find the information of resolution for each level, and how to change the resolution for each level?  
Thanks.