# Surface registration
**URL:** https://discourse.slicer.org/t/surface-registration/9022
**Category:** Support
**Tags:** registration
**Created:** [November 5, 2019, 1:04am UTC](https://discourse.slicer.org/t/surface-registration/9022 "2019-11-05T01:04:32Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@erin\_hong](https://discourse.slicer.org/u/erin_hong)
#### Post date: [November 5, 2019, 1:04am UTC](https://discourse.slicer.org/t/surface-registration/9022/1 "2019-11-05T01:04:32Z")
Operating system:MAC
Slicer version: Slicer 4.0 Slicer CMF
Expected behavior: surface registration
Actual behavior:
have not been successful to register the images that I segmented (a half of mandible without defect then with periodontal bone defects) Since I am trying to register areas that are either very thin crestal bone or absent, I am not able to register so then color maps give me unreliable colored map.
1. Do you think your company’s slicer CMF has an ability to create registration when there is not enough cortical thickness?
2. Is there a manual way to register?
I have included a few images for you to understand what I am trying to do.
---
### Author:  [@bpaniagua](https://discourse.slicer.org/u/bpaniagua)
#### Post date: [January 10, 2020, 8:19pm UTC](https://discourse.slicer.org/t/surface-registration/9022/2 "2020-01-10T20:19:46Z")
@erin_hong please feel free to follow up in this post with any specific questions you might have.
---
### Author:  [@manjula](https://discourse.slicer.org/u/manjula)
#### Post date: [January 10, 2020, 8:35pm UTC](https://discourse.slicer.org/t/surface-registration/9022/3 "2020-01-10T20:35:23Z")
Hi,
Sometime back i had the same problem and tried several options including other software like geomagic and cloudcompare. I got the best results for my problem with CMF ROI registration. I validated the results of superimposition with Model to Model distance and shape population viewer.
I think if you go through the following link you will find useful inputs from many here.
> [@Revisiting Rigid Mesh Registration](https://discourse.slicer.org/t/revisiting-rigid-mesh-registration/9424):
>
> I first posted the problem few months back and Prof: Lassoan help me with it. Now i have had time to read about this topic and play around I would like to have a better understanding of the problem as i am not 100% happy with the results that i am getting with CMF surface registraion module and IGT fiducial registration wizard. i am no mathematician or programmer and many parts of this will be copy pasted from other published work whici i read. Original Problem : We have a STL files from surfa…
We have done similar things with 3D Slicer and i do not think it is related to the thickness of the cortical bone.
Also why are you segmenting and registering at the first place ? Is it not best to simply do Image registration ?