Unstructured mesh to image

ParaView Support
1

I have a 2d unstructured mesh, that I want to resample to image (pixel based) . If I use the filter resample to image, I get an empty figure (it seems it takes only only triangle?)

I follow the steps mentioned here, Resampling using cell data?
but still, I can’t get an output of this.
Could someone explain how to do this?

l1_v4
l1_v42998×1600 306 KB

2

Sadly resampling 2D data is not easy in ParaView, can you give it some depth ?

3

Sure, I can follow this

to get a 3d version of my data.

paraview_2
paraview_21921×1032 188 KB

1 Like
4

Then resampling should work

5

I still get an empty image

3araview_2
3araview_21921×1032 153 KB

6

Please share your data

7

resistivity.vtk (573.2 KB)

The data shared

8

nevermind, ResampleToImage seems to work fine with 2D data!

a
a2954×1732 326 KB

9

3araview_3
3araview_31921×1032 97.2 KB

For me, it returns an empty figure.

10

Change outline representation to surface

11

And closing the app and start again, it’s working !

12

Something is off. The pixels, do not have a solid color. In other words, I was expecting that each pixel to have one color.

3araview_4
3araview_41921×1032 325 KB

13

This is expected with point data. Use Cell Data instead. You can convert using PointDataToCellData filter.

14

Sorry, can’t seem to find this filter. I can only seer CellDataToPoint data.

Can you help me out?

15

Filters → Alphabetical → PointDataToCellData

16

It’s not there for me. I guess it’s because the original vtk is already cell?

3araview_5

17

Yes, use the filter on the ResampleToImage instead.

1 Like
18

Thanks a lot, that worked.

19

Follow up:
I have now a 3d volume, which I make slices out of it. Now the same filter, isn’t working the same way. What is the procedure for 3d?
Slice

3araview_6
3araview_61921×1032 228 KB

3D unstructured mesh
3araview_7
3araview_71920×1031 242 KB

20

Please share some data