[vtkusers] image island removal and hole filling

[Jonathan Morra]

Fantastic, thanks for your help!

On Fri, Dec 3, 2010 at 11:13 AM, David Gobbi <david.gobbi at gmail.com> wrote:

> Hi Jonathan,
>
> I put my flood-fill filter on github, and tested it to make sure it
> still works:
> http://github.com/dgobbi/VTK/tree/flood-fill/Imaging/
>
> The interface is just like the vtkThresholdFilter, except that it
> has a method called SetSeedPoints() to allow you to set your
> seeds.  For a binary image, call ThresholdByUpper(1) so that
> you can set seeds inside any non-zero islands that you want
> to keep in your output.
>
> I'll probably contribute this class to VTK after I have brought
> it up-to-date (it was originally written for VTK 4).
>
>   David
>
>
> On Thu, Dec 2, 2010 at 3:39 PM, Jonathan Morra <jonmorra at gmail.com> wrote:
>
>> Thanks, let me know where I can download it from.
>>
>>
>> On Thu, Dec 2, 2010 at 2:36 PM, David Gobbi <david.gobbi at gmail.com>wrote:
>>
>>> For Step 1, I have a VTK flood-fill class that do the job.  I'll upload
>>> it to
>>> gerrit so that you can try it out.  I don't think anything exists for
>>> your
>>> Step 2, though.
>>>
>>>   David
>>>
>>>
>>> On Thu, Dec 2, 2010 at 3:14 PM, Jonathan Morra <jonmorra at gmail.com>wrote:
>>>
>>>> I have a binary vtkImageData class and I want to do 2 things with it,
>>>> and I don't know how.
>>>>
>>>> 1.  I want to remove all islands from the image except one.  I want to
>>>> identify the island not to be removed by a pixel location.  I have seen
>>>> vtkImageIslandRemoval2D, and I don't think that'll work for me, because I do
>>>> not know anything about the island's size that I want to keep (it could be
>>>> big, small, or in the middle), all that I know is one point which
>>>> is guaranteed to be interior to one island, and that's the island I want to
>>>> keep.
>>>>
>>>> 2.  I want to do hole filling on the output of step 1 and I don't know
>>>> how to do that.  I saw vtkFillHolesFilter but that appears only to work on
>>>> poly data.  I'd like something analogous to that for vtkImageData.
>>>>
>>>> If anyone knows how to do these things, I'd appreciate it.  Also, if it
>>>> matters, I'm coding in Java.
>>>>
>>>> Thanks
>>>>
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>>
>
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