# SPHARM PDM Correspondence improvement

**URL:** <https://discourse.slicer.org/t/spharm-pdm-correspondence-improvement/23897>\
**Category:** SlicerSALT\
**Created:** [June 16, 2022, 4:09am UTC](https://discourse.slicer.org/t/spharm-pdm-correspondence-improvement/23897 "2022-06-16T04:09:33Z")\
**Posts on this page:** 4\
**Page:** 2

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**Author:** ![Hoai-Nam\_Bui](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/hoai-nam_bui/32/15877_2.png) [@Hoai-Nam\_Bui](https://discourse.slicer.org/u/Hoai-Nam_Bui)\
**Post date:** [April 20, 2023, 10:06pm UTC](https://discourse.slicer.org/t/spharm-pdm-correspondence-improvement/23897/21 "2023-04-20T22:06:31Z")

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Dear @Connor-Bowley,  
I’ve been able to run both Spharm Correspondence improvement and the Procrustes registration module with 3 samples, however in my attempts to increase my sample size I am unable to attain aligned specimens. They seem to be just slightly-off from one another in terms of alignment.

I’m also wondering-- if I can align them manually in a separate program, is there a way to deal with scaling prior to running a PCA?

 ![Screenshot 2023-04-20 at 3.55.24 PM](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/7/5/7578ba08ffb53517259b19673bb2c75936454996.jpeg)  
 ![Screenshot 2023-04-20 at 4.05.47 PM](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/a/c/ac3c637f4daa51965ee241eaef440695649065cc.jpeg)

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**Author:** ![lili-yu22](https://avatars.discourse-cdn.com/v4/letter/l/dbc845/32.png) [@lili-yu22](https://discourse.slicer.org/u/lili-yu22)\
**Post date:** [December 20, 2024, 7:53am UTC](https://discourse.slicer.org/t/spharm-pdm-correspondence-improvement/23897/22 "2024-12-20T07:53:19Z")

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![Screenshot_20241219_151735](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/4/5/45ba029a73721af2f861fc4d8a9589463b484ffb.jpeg)  
 ![IMG_20241220_155543_edit_8092433669597](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/f/8/f85d86e5a4855b051aa1c6c5ec6be9f0bc77116c.jpeg)

when I open a mesh.then open it’s fiducial.the slicersalt 5.0 crash.how I can put the fiducial on the mesh in the shape population viewer like the picture.please help me

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**Author:** ![anasmh101](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/anasmh101/32/80621_2.png) [@anasmh101](https://discourse.slicer.org/u/anasmh101)\
**Post date:** [July 12, 2025, 8:51pm UTC](https://discourse.slicer.org/t/spharm-pdm-correspondence-improvement/23897/23 "2025-07-12T20:51:04Z")

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Hello,  
I’m using the latest version of SlicerSALT (version 6), but the Correspondence Improvement module isn’t responding. what could be causing this issue?

Thanks in Advance

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**Author:** ![anasmh101](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/anasmh101/32/80621_2.png) [@anasmh101](https://discourse.slicer.org/u/anasmh101)\
**Post date:** [July 12, 2025, 8:54pm UTC](https://discourse.slicer.org/t/spharm-pdm-correspondence-improvement/23897/24 "2025-07-12T20:54:19Z")

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Hello,  
I just wanted to check if you’ve managed to resolve the correspondence alignment issue. Have you found a solution or workaround?

[Previous page](https://discourse.slicer.org/t/spharm-pdm-correspondence-improvement/23897.md?page=1)