routine or plugin to move down the resolution of 3D images

[Laure E]

I’m using binary 3D images as input of a model. I have high resolution images that are currently too heavy to compute processes in. I need to decrease the number of voxels while keeping essential morphological features and physical image dimensions. I’m looking for a way to merge original voxels into bigger units (cubes of 2 voxels by side).

Do you know any routine on ImageJ or algorithm to achieve this?
Thanks for you help!

[Michael Schmid]

Hi Laure,

you can use Image>Transform>Bin (for integer size factors only)
  http://rsb.info.nih.gov/ij/docs/guide/146-28.html#sub:Bin...
or Image>Adjust>Size (can do any size of the final image)
  http://rsb.info.nih.gov/ij/docs/guide/146-28.html#toc-Subsubsection-28.2.6

If you need a binary image, threshold the result (all stack slices).

If you need it often, use Process>Macros>Record to create a macro.

When using Image>Transform>Bin, use 'Average'; it seems that 'Median' does
not work for binning in z.

Michael
_____________________________________________________________________

On Sun, May 3, 2015 15:38, Laure E wrote:

> I'm using binary 3D images as input of a model. I have high resolution
> images
> that are currently too heavy to compute processes in. I need to decrease
> the
> number of voxels while keeping essential morphological features and
> physical
> image dimensions. I'm looking for a way to merge original voxels into
> bigger
> units (cubes of 2 voxels by side).
>
> Do you know any routine on ImageJ or algorithm to achieve this?
> Thanks for you help!
>

--
ImageJ mailing list: http://imagej.nih.gov/ij/list.html