# Is it easy to change the level set function ?

**URL:** https://discourse.itk.org/t/is-it-easy-to-change-the-level-set-function/4871
**Category:** Algorithms
**Created:** [March 18, 2022, 9:33pm UTC](https://discourse.itk.org/t/is-it-easy-to-change-the-level-set-function/4871 "2022-03-18T21:33:37Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![Oddone-Scatena](https://discourse.itk.org/user_avatar/discourse.itk.org/oddone-scatena/32/2651_2.png) [@Oddone-Scatena](https://discourse.itk.org/u/Oddone-Scatena)
#### Post date: [March 18, 2022, 9:33pm UTC](https://discourse.itk.org/t/is-it-easy-to-change-the-level-set-function/4871/1 "2022-03-18T21:33:37Z")

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Level set methods solve the diferencial equation with the level set function:  
 ![level set](https://discourse.itk.org/uploads/default/original/2X/b/bd42387b80d2b3e428da07196aaf7dfa78ffb24f.png)  
I am using geodesic active contour:  
 ![geodesicactive](https://discourse.itk.org/uploads/default/original/2X/4/44188da0d3d95ae6b90b9457681ace350cc163f6.png)  
But I wished that A was the solution of the gradient vector flow ( Using anatomical knowledge expressed as fuzzy constraints to segment the heart in CT images), defined by:  
 ![image](https://discourse.itk.org/uploads/default/original/2X/7/77f38880c589a35f7922e8b49e11ea41d16f60a1.png)  
Is it possible to modify A(x) and P(x)?