# Need to specify parameters of affine transform as part of registration process?

**URL:** https://discourse.itk.org/t/need-to-specify-parameters-of-affine-transform-as-part-of-registration-process/1322
**Category:** Beginner Questions
**Tags:** simpleitk, registration, python
**Created:** [October 3, 2018, 6:09am UTC](https://discourse.itk.org/t/need-to-specify-parameters-of-affine-transform-as-part-of-registration-process/1322 "2018-10-03T06:09:26Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![mliljeroth](https://discourse.itk.org/letter_avatar_proxy/v4/letter/m/919ad9/32.png) [@mliljeroth](https://discourse.itk.org/u/mliljeroth)
#### Post date: [October 3, 2018, 6:09am UTC](https://discourse.itk.org/t/need-to-specify-parameters-of-affine-transform-as-part-of-registration-process/1322/1 "2018-10-03T06:09:26Z")

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Hi. This is a question without any code. Looking at the documentation it seems like you would have to specify the translation, rotation and shearing you would like to do for a composite affine transformation as part of a registration process. For deformable registrations that have “registration filter” functions, you don’t need to do this. Am i misunderstanding something here?

Thanks,

Maria