a sharpened question:
if the 3D input image doesn't have isotropic dimensions (such as 0.5*0.5*1
mm^3)- which dimensions the structural element has (with radius 1, for
example)?
if the answer is [0.5 0.5 1]=size(StrEle) it means that the opening process
will eliminate blood vessels with diameter 1*1*2 mm^3.
have I understood it right?
On Wed, May 30, 2012 at 1:16 PM, Goch, Caspar Jonas <
[email protected]> wrote:
> Hi Hila,****
>
> ** **
>
> I am currently not aware of a direct out-of-the-box approach. But assuming
> you have a binary segmentation and also assuming, that the small blood
> vessels you have are basically a one voxel wide line (hence you trying to
> erode with 0.5) you might for example go for eroding any voxel which has at
> least 20 zero value voxels in a 26 neighborhood or something similar.****
>
> ** **
>
> The itk neighborhood iterator might come in handy for this.****
>
> ** **
>
> Best,****
>
> Caspar****
>
> ** **
>
> *Von:* Hila Hiler [mailto:[email protected]]
> *Gesendet:* Mittwoch, 30. Mai 2012 11:45
> *An:* Goch, Caspar Jonas
> *Cc:* [email protected]
>
> *Betreff:* Re: [mitk-users] opening with partial radius****
>
> ** **
>
> Hi Casper,
>
> Thank you for the response.
>
> Do you have any idea for an alternative way to do that ?
>
> I just want to remove blood vessels which are smaller then 1mm.
>
> Thanks in advance.
> Hila****
>
> On Wed, May 30, 2012 at 12:34 PM, Goch, Caspar Jonas <
> [email protected]> wrote:****
>
> Hi Hila,****
>
> ****
>
> the radius you can set is used to construct an
> itk::BinaryBallStructuringElement.
> The radius is not in millimeter but in a voxel.****
>
> ****
>
> Best,****
>
> Caspar****
>
> ****
>
> *Von:* Hila Hiler [mailto:[email protected]]
> *Gesendet:* Mittwoch, 30. Mai 2012 08:43
> *An:* [email protected]
> *Betreff:* Re: [mitk-users] opening with partial radius****
>
> ****
>
> correction:
> if I want to erode with* 1mm diameter (radius 0.5 *as small blood vessels
> are) - I can't do this with this tool?****
>
> On Tue, May 29, 2012 at 7:20 PM, Hila Hiler <[email protected]> wrote:**
> **
>
> Hi all,
>
> The basic image processing plug in is a very useful tool!
> How ever, are the erosion/opening etc (unary manipulations) available only
> with integers inputs (radius)?
> if I want to erode with 1mm radius (as small blood vessels are) - I can't
> do this with this tool?
>
>
> Best Regards,
> Hila****
>
> ****
>
> ** **
>
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