# Multi Object Segmentation by Level Set Method

**URL:** <https://discourse.itk.org/t/multi-object-segmentation-by-level-set-method/534>\
**Category:** Algorithms\
**Created:** [December 17, 2017, 2:44pm UTC](https://discourse.itk.org/t/multi-object-segmentation-by-level-set-method/534 "2017-12-17T14:44:45Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![arwtyxouymz](https://discourse.itk.org/user_avatar/discourse.itk.org/arwtyxouymz/32/379_2.png) [@arwtyxouymz](https://discourse.itk.org/u/arwtyxouymz)\
**Post date:** [December 17, 2017, 2:44pm UTC](https://discourse.itk.org/t/multi-object-segmentation-by-level-set-method/534/1 "2017-12-17T14:44:46Z")

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Hi,

Although I wonder if I should ask here, I have a question about level set method.

Is it possible to detect multi object contour by using level set method?

Or, supposing there are 3 object,  
is the contour detection in order like below?  
Firstly Object1  
Secondly Object2  
Finally Object3

Please help me

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**Author:** ![tim-evain](https://discourse.itk.org/user_avatar/discourse.itk.org/tim-evain/32/220_2.png) [@tim-evain](https://discourse.itk.org/u/tim-evain)\
**Post date:** [December 18, 2017, 2:00pm UTC](https://discourse.itk.org/t/multi-object-segmentation-by-level-set-method/534/2 "2017-12-18T14:00:14Z")

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Hi @arwtyxouymz,

To answer your question : yes you can do multi-objects segmentation with level-set methods.

How to do it is such a vast topic that I encourage you to do some literature review first to get a better understanding of the question. You can take a look at region-based formulations (Chan & Vese) and multiphase extensions as a starting point.

HTH,

Tim