On Jun 5, 8:59=A0am, luca.pampar...@[EMAIL PROTECTED]
wrote:
> Hi everyone,
>
> I am currently doing a threhold based segmentation (Otsu segmentation)
> on an image and would like to connect some of the voxels using
> dilation. What is the normal approach here? Usually, what kind of
> structuring element would one use? is there a rule to determine this
> or do you just try different ones till one of them seems to work?
> Also, what about the subsequent erosion? What sort of structuring
> element is recommended there?
>
> Thanks,
> Luca
----------------------------------------------------
Luca:
I usually do a closing (dilation followed by erosion) rather than a
dilation because I want to end up with the same size structures before
segmentation rather than larger structures. I use a round structuring
element because if I use a box or cube I get artifacts. If you use a
square structuring element on an image of a thin ring-shaped
structure, you'll see bogus artifacts at 45 degrees, 135 degrees,
etc. These are minimized with a circle. Try different window sizes
and on the original gray scale image or on the binarizy, thresholded
image and just see what works best in your situation.
Regards,
ImageAnalyst
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