[ITK] [ITK-users] Largest Connected Region

[Michael Pinkert]

Hi Matt,

Thank you very much.  This and another filter that was sent to me have both
been very helpful.  I knew I was probably missing something big.

Best regards,
Michael Pinkert


Matt McCormick-2 wrote
> Hi Michael,
> 
> This filter [1] can keep the largest object.  Use
> 
>   filter->SetAttribute( "PhysicalSize" )
> 
> and
> 
>   filter->SetNumberOfObject( 1 )
> 
> Hope this helps,
> Matt
> 
> [1]
> http://www.itk.org/Doxygen/html/classitk_1_1BinaryShapeKeepNObjectsImageFilter.html
> 
> On Mon, Jul 14, 2014 at 1:58 PM, Michael Pinkert <

> mpinkert@

> > wrote:
>> Hi everyone,
>>
>> I am using the Otsu algorithm as part of a pipeline to segment breast
>> images, but the results consistently have several holes and isolated
>> regions
>> of noise, both of which are large problems I am looking to deal with.  I
>> intend to use morphological operators for the hole problem, but I have
>> not
>> had luck finding a method to eliminate the isolated regions of noise
>> while
>> preserving the remainder of the image.
>>
>> The breast is a connected region in the results, and the noise is always
>> a
>> much smaller region.  Is there a filter that could obtain the largest
>> connected region from from a binary image, so that the breast may be
>> extracted and the noise removed?
>>
>> I have looked at some of the various connected region algorithms, but
>> they
>> require seeds in order to function, and I have not seen one that can
>> automatically isolate the largest connected region from a binary mask and
>> make it as an output.
>>
>> If none of the existing filters work I intend to write a new one to do
>> so,
>> but I thought it would be best to check first.
>>
>> Best regards,
>> Michael Pinkert
>>
>>
>>
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