[ITK Community] [Insight-users] Automatically finding spheres in 3D images

[Bill Lorensen]

If you already have segmented the objects, look at Filtering/LabelMap.
Look at the test: LabelMap/test/itkShapeLabelObjectAccessorsTest1.cxx



On Wed, Dec 18, 2013 at 9:10 AM, Bradley Lowekamp <brad at lowekamp.net> wrote:
> Ohh, yeah there are morphology techniques too.
>
> I believe the top-hat[1][2] filter can also be very useful for detecting dark/black spots smaller the the structuring element.
>
> [1] http://www.itk.org/Doxygen/html/classitk_1_1BlackTopHatImageFilter.html
> [2] http://www.itk.org/Doxygen/html/classitk_1_1WhiteTopHatImageFilter.html
>
> On Dec 18, 2013, at 9:05 AM, Matt McCormick <matt.mccormick at kitware.com> wrote:
>
>> Hi Dave,
>>
>> Binary morphological opening [1] may work well.  See, for example [2].
>>
>> Hope this helps,
>> Matt
>>
>> [1] http://itk.org/Doxygen/html/classitk_1_1BinaryMorphologicalOpeningImageFilter.html
>> [2] http://homepages.inf.ed.ac.uk/rbf/HIPR2/open.htm
>>
>> On Wed, Dec 18, 2013 at 8:57 AM, David Cole <dlrdave at aol.com> wrote:
>>>> Have you tried Hough transforms?
>>>>
>>>>
>>> http://www.itk.org/Doxygen/html/classitk_1_1HoughTransform2DCirclesImageFilter.html
>>>
>>>
>>> Not yet, but I will now, thanks very much!
>>>
>>>
>>> D
>>>
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