# Is there a bug in InPlaceImageFilter?

**URL:** <https://discourse.itk.org/t/is-there-a-bug-in-inplaceimagefilter/6318>\
**Category:** Uncategorized\
**Created:** [November 25, 2023, 5:28am UTC](https://discourse.itk.org/t/is-there-a-bug-in-inplaceimagefilter/6318 "2023-11-25T05:28:40Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![mihail.isakov](https://discourse.itk.org/letter_avatar_proxy/v4/letter/m/c4cdca/32.png) [@mihail.isakov](https://discourse.itk.org/u/mihail.isakov)\
**Post date:** [November 25, 2023, 5:28am UTC](https://discourse.itk.org/t/is-there-a-bug-in-inplaceimagefilter/6318/1 "2023-11-25T05:28:40Z")

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I see this in SimpleITK’s _Todo List_

 ![Screenshot 2023-11-25 at 06-14-10 SimpleITK Todo List](https://discourse.itk.org/uploads/default/original/2X/1/1deee60c880aecdba4c70bb1672df71c58567705.png)

The link points to ITK’s _InPlaceImageFilter_. Is there an issue or more information about the bug?

Thanks!

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**Author:** ![blowekamp](https://discourse.itk.org/user_avatar/discourse.itk.org/blowekamp/32/79_2.png) [@blowekamp](https://discourse.itk.org/u/blowekamp)\
**Post date:** [November 27, 2023, 1:02pm UTC](https://discourse.itk.org/t/is-there-a-bug-in-inplaceimagefilter/6318/2 "2023-11-27T13:02:55Z")

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Hello,

I don’t think there is any more information. The is a filter by the same name that is in ITK: [ITK: itk::Testing::HashImageFilter\< TImageType \> Class Template Reference](https://itk.org/Doxygen/html/classitk_1_1Testing_1_1HashImageFilter.html)

The ITK class is derived from InPlaceImageFilter. Likely when the filter was contributed to ITK the corrections were made. The main difference is that the SimpleITK version support SHA1.

Hrmm… May be interesting to use a object factory for hash algorithms so that the supported methods could be extended.