Hello Ben,
vmtkimagecompose is for taking two images having the same dimensions (e.g.
256x256x128) and
producing an image by performing a pixel-wise operation on the inputs (e.g.
output[i,j,k] = input1[i,j,k] x input2[i,j,k])
The pixel-wise operation can be min, max, multiply and subtract, as of now.
The negatei2 option means that input2[i,j,k] is multiplied by -1 before the
operation is applied.
Typically, vmtkimagecompose comes in handy when you need to merge two level
sets segmentations
over the same input image. Using -operation min (the default), the output level
set will be the pixel-wise
minimum between the two level sets, which leads to the segmented surfaces being
fused together.
Hope this helps
Luca
On May 29, 2012, at 5:56 PM, Dickerhoff, Benjamin R wrote:
> VMTK Users,
>
> I'm using the vmtkimagecompose script in attempts to merge two level set
> image segmentations. Can anyone explain what the "min, max, multiply, and
> subtract" operations do with two input image files? Also, what does the
> negatei2 option do as well?
>
> Thanks in advance for any help you might be able to offer with understanding
> this script.
> -Ben Dickerhoff
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