# What do the results by Model-to-Model Distance means?

**URL:** <https://discourse.slicer.org/t/what-do-the-results-by-model-to-model-distance-means/31243>\
**Category:** Support\
**Tags:** 3d-model\
**Created:** [August 19, 2023, 3:34pm UTC](https://discourse.slicer.org/t/what-do-the-results-by-model-to-model-distance-means/31243 "2023-08-19T15:34:52Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![KAMONCHAT\_APIVANICHK](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/kamonchat_apivanichk/32/10368_2.png) [@KAMONCHAT\_APIVANICHK](https://discourse.slicer.org/u/KAMONCHAT_APIVANICHK)\
**Post date:** [August 19, 2023, 3:34pm UTC](https://discourse.slicer.org/t/what-do-the-results-by-model-to-model-distance-means/31243/1 "2023-08-19T15:34:52Z")

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I get a problem about the meaning of value from Model to Model Distance. I set the predicted model as source model and the ground truth model as target model, I thought that the negative value means the predicted model is inside the ground truth model. But I got the same result when I switched them (the predicted model as target model and the ground truth model as source model)

I am very confuse. What is wrong?

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**Author:** ![KAMONCHAT\_APIVANICHK](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/kamonchat_apivanichk/32/10368_2.png) [@KAMONCHAT\_APIVANICHK](https://discourse.slicer.org/u/KAMONCHAT_APIVANICHK)\
**Post date:** [August 20, 2023, 1:05am UTC](https://discourse.slicer.org/t/what-do-the-results-by-model-to-model-distance-means/31243/2 "2023-08-20T01:05:21Z")

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I get a problem about the meaning of value from Model to Model Distance. I set the predicted model as source model and the ground truth model as target model, I thought that the negative value means the ground truth model is inside the predicted model.

 ![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/8/a/8a3a877085f7f30f2a4adfe1a05244edafc3650e.jpeg)

But the another result, I got the same result when I switched them (the predicted model as target model and the ground truth model as source model)

 ![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/0/7/07714798fa1d3222b973a9360161bb6cfe455ae5.jpeg)

I am very confuse. What is matter?