# How to write a 2d image into a vtk file?
**URL:** https://discourse.vtk.org/t/how-to-write-a-2d-image-into-a-vtk-file/8666
**Category:** Support
**Created:** [June 5, 2022, 10:36am UTC](https://discourse.vtk.org/t/how-to-write-a-2d-image-into-a-vtk-file/8666 "2022-06-05T10:36:28Z")
**Posts on this page:** 6
**Page:** 1
### Author:  [@Clifford](https://discourse.vtk.org/u/Clifford)
#### Post date: [June 5, 2022, 10:36am UTC](https://discourse.vtk.org/t/how-to-write-a-2d-image-into-a-vtk-file/8666/1 "2022-06-05T10:36:28Z")
I use matplotlib to draw my results, and it looks like:
Is there any way to write them into a .vtk file and looks like a 3D graph?
---
### Author:  [@mau\_igna\_06](https://discourse.vtk.org/u/mau_igna_06)
#### Post date: [June 5, 2022, 1:03pm UTC](https://discourse.vtk.org/t/how-to-write-a-2d-image-into-a-vtk-file/8666/2 "2022-06-05T13:03:01Z")
In Slicer you can plot data like this:
# Get a volume from SampleData and compute its histogram
import SampleData
import numpy as np
volumeNode = SampleData.SampleDataLogic().downloadMRHead()
histogram = np.histogram(arrayFromVolume(volumeNode), bins=50)
chartNode = slicer.util.plot(histogram, xColumnIndex = 1)
chartNode.SetYAxisRangeAuto(False)
chartNode.SetYAxisRange(0, 4e5)
Hope it helps
Mauro
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### Author:  [@marcomusy](https://discourse.vtk.org/u/marcomusy)
#### Post date: [June 5, 2022, 1:32pm UTC](https://discourse.vtk.org/t/how-to-write-a-2d-image-into-a-vtk-file/8666/3 "2022-06-05T13:32:26Z")
> [@Clifford](#):
>
> and looks like a 3D graph?
you mean something like this?
then you can use `vtkImageActor ` class and save its input as vtk.
(code for the above):
```python
from vedo import Picture, show
pic = Picture("https://discourse.vtk.org/uploads/default/original/2X/4/4c572287d5ce9d0efbb98ce33b3cf3aaaaf39965.png")
pic.show(bg2="green9").close()
# Another option:
# import numpy as np
# from vedo.pyplot import plot
# data = np.random.rand(200,2)
# plot(data, marker='s', mc="green5", lw=0).show()
```
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### Author:  [@Clifford](https://discourse.vtk.org/u/Clifford)
#### Post date: [June 6, 2022, 2:46am UTC](https://discourse.vtk.org/t/how-to-write-a-2d-image-into-a-vtk-file/8666/4 "2022-06-06T02:46:47Z")
Is there a way to remove background? And let squares and stars be like 3D objects( give them a thick)
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### Author:  [@marcomusy](https://discourse.vtk.org/u/marcomusy)
#### Post date: [June 6, 2022, 9:40am UTC](https://discourse.vtk.org/t/how-to-write-a-2d-image-into-a-vtk-file/8666/5 "2022-06-06T09:40:48Z")
but then you need to recreate the plot, for this you may use a `vtkGlyph` object.
`vedo` has this functionality, plus you can control the plot aspect ratio:
```python
import numpy as np
from vedo.pyplot import plot
from vedo import Cube, Star
data = np.random.rand(200,2)
m = Cube().scale(0.025)
p = plot(data, marker=m, mc="green5", lw=0, aspect=16/9)
s = Star().scale(0.03).extrude(0.1)
p+= plot(data[:10], marker=s, mc="red5", lw=0, like=p)
p.unpack(1).lighting("default")
p.show()
```
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### Author:  [@Clifford](https://discourse.vtk.org/u/Clifford)
#### Post date: [June 9, 2022, 11:16am UTC](https://discourse.vtk.org/t/how-to-write-a-2d-image-into-a-vtk-file/8666/6 "2022-06-09T11:16:43Z")
Thanks so much!
Btw, can I write .vtk file through matplotlib? cuz I draw images above through matplotlib, want to figure out if there’s a way to write 3D file at the same time