Posted by
Herbie on
URL: http://imagej.273.s1.nabble.com/Hyperstack-with-nz-1-problem-tp5019980p5020058.html
Good day!
"[...] so that ImageJ treats a single slice as a volume?"
A slice is an image!
A slice has no extension orthogonal to itself.
A pixel also has no extension in any direction because it is a mathematical
point in 2D, i.e. a number or sample value.
A voxel also has no extension in any direction because it is a mathematical
point in 3D, i.e. a number or sample value.
Pixels, i.e. values at points in 2D, are arranged in a 2D grid and the
sometimes equidistant *spacing* of the grid points is often confused with
the pixel size, that actually doesn't exist.
(A pixel doesn't have a size.)
Voxels, i.e. values at points in 3D, are arranged in a 3D grid and the
sometimes equidistant *spacing* of the grid points is often confused with
the voxel size, that actually doesn't exist.
(A voxel doesn't have a size.)
In short:
A slice has no neighbors orthogonal to itself, i.e. there is no (defined)
spacing in the third dimension.
That said, you may indeed use dummy slices to define the missing spacing!
HTH
Herbie
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