# \#processing

**URL:** https://discourse.itk.org/tag/processing/81.md

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## [Filter output as input for the same filter](https://discourse.itk.org/t/filter-output-as-input-for-the-same-filter/1464)

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**Author:** [@Gordian](https://discourse.itk.org/u/Gordian)\
**Replies:** 1\
**Last updated:** [December 10, 2018, 2:41pm UTC](https://discourse.itk.org/t/filter-output-as-input-for-the-same-filter/1464 "2018-12-10T14:41:29Z")

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Hello, just a question of good practice: It is okay to use the output of a filter as input for the same filter instance? (non-functional) Example: auto AddFilter = itk::AddImageFilter::New(); AddFilter-\>SetInput1(Ima…