Intensity_based_Segmentation (#12491)

* Add files via upload

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* Update intensity-based_segmentation.py

* Update and rename intensity-based_segmentation.py to intensity_based_segmentation.py

* Update intensity_based_segmentation.py

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* [0, 1, 1]], dtype=int32)

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Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: Christian Clauss <cclauss@me.com>