[Insight-users] Fuzzy Affinity

[Luis Ibanez]

Hi Martino,

There are three implementations of Fuzzy Connectedness
image filters in ITK. Each one of them uses a particular
definition of FuzzyAffinity.

These filters are:

    - SimpleFuzzyConnectednessScalarImageFilter
    - VectorFuzzyConnectednessImageFilter
    - SimpleFuzzyConnectednessRGBImageFilter


http://www.itk.org/Insight/Doxygen/html/classitk_1_1SimpleFuzzyConnectednessScalarImageFilter.html
http://www.itk.org/Insight/Doxygen/html/classitk_1_1VectorFuzzyConnectednessImageFilter.html


If you are interested on the particular implementations of
the FuzzyAffinity() functions, you may want to take a look
at the code in the directory:

        InsightApplications/Code/Algorithms

more specifically to each one of the files

    itkSimpleFuzzyConnectednessImageFilterBase.txx
    itkSimpleFuzzyConnectednessRGBImageFilter.txx
    itkSimpleFuzzyConnectednessScalarImageFilter.txx
    itkVectorFuzzyConnectednessImageFilter.txx


Regards,


    Luis


--------------------------
Martino Gabriele wrote:

> Hi Luis,
> im very happy you answered my question.
> Im sorry but when i telked about several
> implementations i talked about fuzzy affinity,
> not fuzzy connectedness.When i talk about fuzzy affinity 
> i mean what kind of "gaussian" functions itk uses.
> So id like to know how many different 
> implementantions of affinity are there in itk.
> 
> How is computed object mean? Is it a mean
> of a window( 20x20 pixels for examples) around 
> the seed pixel? Doesnt itk implement multiseed 
> approch? Doesnt itk utilize object and backgroound mean
> approch for object-feature component how Udupa does? 
> Im sorry but my english is not good.
> 
> Thank a lot 
> 
> ---------- Initial Header -----------
> 
>>From      : "Luis Ibanez" luis.ibanez at kitware.com
> To          : "Martino Gabriele" g91182 at libero.it
> Cc          : "insight-users" insight-users at itk.org
> Date      : Thu, 22 Jul 2004 10:05:26 -0400
> Subject : Re: [Insight-users] 4-neighbors or 2-neighbors?
> 
> 
>>Hi Martino,
>>
>>ITK doesn't have a global policy about the type
>>of neighbors to use. This is a decision that is
>>made differently in every algorithm.
>>
>>ITK's infrastructure allows you to use different
>>types of neighborhood relationships. You will have
>>to check this policy for every algorithm that you
>>are interested in using.
>>
>>For an answer to your technical question regarding
>>the implementation of the Fuzzy Connectedness algorithm
>>please look at the following email:
>>
>>http://www.itk.org/pipermail/insight-users/2004-July/009593.html
>>
>>
>>
>>Regards,
>>
>>
>>    Luis
>>
>>
>>
>>-------------------------
>>Martino Gabriele wrote:
>>
>>
>>>Hi,
>>>im working with image segmentation and also with itk to tests my alghoritms.ive tried to see itk code about fuzzy segmentation and ive found, in itkSimpleFuzzyConnectednessImageFilterBase.txx, a procedure, pushneighbors, in which only the right and left neighbors of current index are filled in a queue.....but hasnt itk used 4-neighbors approch?
>>>Ive seen there are a lots of alghoritms about fuzzy segmentation and so there are a lots of implementations about fuzzy affinity....can you indicate me all this implementation?
>>>Your software is fantastic.
>>>
>>>Thanks a lot.
>>>
>>>Bye
>>>
>>>_______________________________________________
>>>Insight-users mailing list
>>>Insight-users at itk.org
>>>http://www.itk.org/mailman/listinfo/insight-users
>>>
>>
>>
>>
>>
> 
>