# Extracting isosurface from a vtkImageData

**URL:** https://discourse.vtk.org/t/extracting-isosurface-from-a-vtkimagedata/10502
**Category:** Support
**Tags:** python
**Created:** [January 19, 2023, 2:30pm UTC](https://discourse.vtk.org/t/extracting-isosurface-from-a-vtkimagedata/10502 "2023-01-19T14:30:40Z")
**Posts on this page:** 1
**Showing post:** 9

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### Author: ![Jishnu](https://discourse.vtk.org/user_avatar/discourse.vtk.org/jishnu/32/6221_2.png) [@Jishnu](https://discourse.vtk.org/u/Jishnu)
#### Post date: [January 21, 2023, 6:01am UTC](https://discourse.vtk.org/t/extracting-isosurface-from-a-vtkimagedata/10502/9 "2023-01-21T06:01:06Z")

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Hi @marcomusy, Thank you very much for pointing this out. You are right. I am getting a sphere as contour output as given below:

 ![contourFilterOut](https://discourse.vtk.org/uploads/default/original/2X/9/9f17c90e82afc11c957074140512475f19327976.png)  
However, as you see the surface is very rough, is there any way to get a smooth sphere?  
@will.schroeder, @marcomusy, based on your experience, am I using the right method here?

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