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Let's suppose I have created a 3d image of gray scale Images with:

image3d = Image3D[Table[readImage[i], {i, numberOfImages}]];

and 

image3dSlices = Image3DSlices[image3d]

To show the 3d image I can use:

image3d

or 

Image3D[image3dSlices[[startImageNumber;;endImageNumber]]]

Is it somehow possible to convert the image data so that I could use ListPlot3D or ListDensityPlot3D? Please see also here:

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    $\begingroup$ ListDensityPlot[ImageData@image3dSlices[[imageNumber]]] and ListPlot3D[ImageData@image3dSlices[[imageNumber]]]? $\endgroup$
    – kglr
    Commented Oct 10, 2017 at 13:10
  • $\begingroup$ @kglr: Thank you. But how could I use e.g. ListPlot3D for all the images at once? $\endgroup$
    – mrz
    Commented Oct 10, 2017 at 13:20
  • $\begingroup$ ListPlot3D[ImageData/@image3dSlices]? $\endgroup$
    – kglr
    Commented Oct 10, 2017 at 13:45

2 Answers 2

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your linked example looks to be essentially binary. Maybe something like this is what you are after?

img = Image3D[
  Table[ SparseArray[
     Rule[#, 1] & /@ 
      Round@CirclePoints[{10, 10}, (81 - (i - 10)^2)/20, 100] ,
      {20,20}] // Normal, {i, 19}]]

enter image description here

 ListPointPlot3D[Position[ImageData[img], 1., {3}]]

enter image description here

If your data isnt exactly binary maybe some threshold will work eg.

ListPointPlot3D[Position[ImageData[img], x_Real /; x > .1, {3}]]
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  • $\begingroup$ Thank you. I was looking for this kind of solution. $\endgroup$
    – mrz
    Commented Oct 11, 2017 at 8:33
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Perhaps

slices = Image3DSlices[ExampleData@{"TestImage3D", "CTengine"}];
Row[{Show[slices[[14]], ImageSize -> 300], 
  ListDensityPlot[ImageData@slices[[14]], ImageSize -> 300],
  ListPlot3D[ImageData@slices[[14]], ImageSize -> 300]}, Spacer[10]]

enter image description here

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  • $\begingroup$ This solution is very helpful to plot the single image slices and be able to control the axes ranges (ticks). Great. $\endgroup$
    – mrz
    Commented Oct 11, 2017 at 4:25

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