# rotate the image

**URL:** https://discourse.itk.org/t/rotate-the-image/3340
**Category:** Uncategorized
**Tags:** registration, python, simpleitk
**Created:** [July 28, 2020, 8:56am UTC](https://discourse.itk.org/t/rotate-the-image/3340 "2020-07-28T08:56:38Z")
**Posts on this page:** 1
**Showing post:** 3

<div class="post-metadata">

### Author: ![TJH123456](https://discourse.itk.org/user_avatar/discourse.itk.org/tjh123456/32/1654_2.png) [@TJH123456](https://discourse.itk.org/u/TJH123456)
#### Post date: [August 3, 2020, 7:58am UTC](https://discourse.itk.org/t/rotate-the-image/3340/3 "2020-08-03T07:58:27Z")

</div>

Thank you for your reply. I’m sorry I didn’t reply you the other day.

I calculate the mutual information value of Shannon entropy on the image. I believe you have seen it in [another question](https://discourse.itk.org/t/mutual-information-entropy/3341) I asked. I calculate it outside the framework. Will this lead to the above situation？（After adjusting the parameters, the similarity measure changes little.）

In addition, I checked the official documents of simpleitk, and found an index I didn’t pay attention to before, which is called “ **JointHistogramMutualInformation** ”. Is this the mutual information value of Shannon entropy?

Thank you again for your answer.

---

_[View the full topic](https://discourse.itk.org/t/rotate-the-image/3340)._