[Insight-users] Minimum/Maximum Image Filters

[Gaëtan Lehmann]

Le 10 déc. 10 à 12:59, Luis Ibanez a écrit :

> Hi David,
>
> Thanks for posting the example.
>
> I just modified the CreateImage() method
> to better illustrate what this filter does.
>
> http://www.itk.org/Wiki/ITK/Examples/ImageProcessing/RegionalMaximaImageFilter
>
> It essentially find the local maxima in the
> input image and mark them in the output
> image.  So, the output image is a binary
> image that is zero everywhere, except at
> the pixels that are local intensity maxima
> in the input image.
>
> This is the filter that you may want to
> run on the output of an FFT crosscorrelation
> if you were looking for a face in a group
> photograph, or the if you were analyzing
> the parameter space of an Hough transform.
>
>
> I'm not sure that this is what Robert was
> asking for...   from his email, it looks like
> he wanted the output pixel to have the
> value of the input pixel.   On the bright side
> that probably can be done with a minor
> retouch of the filter source code.

Hi,

This is exactly what itk::ValuedRegionalMaximaImageFilter is doing.
IIRC, itk::RegionalMaximaImageFilter use the output of  
itk::ValuedRegionalMaximaImageFilter to produce its output image.

Regards,

Gaëtan


>
> but, maybe now that the example is clearer,
> it would be easier for Robert to give it a try
> and let us know.
>
>
>     Luis
>
>
> -----------------------------------------------
> On Thu, Dec 9, 2010 at 11:25 AM, David Doria <daviddoria at gmail.com>  
> wrote:
>> On Thu, Dec 9, 2010 at 11:16 AM, Ryan Smith  
>> <ryanleesmith at gmail.com> wrote:
>>> Hi Robert-
>>>
>>> You might take a look at the itk::RegionalMaximaFilter.
>>>
>>> Here is a previous response that helped me with a similar task:
>>>
>>> http://public.kitware.com/pipermail/insight-users/2010-September/038088.html
>>>
>>> Cheers-
>>> -Ryan
>>
>> (small typo:  itk::RegionalMaximaFilter ->   
>> itk::RegionalMaximaImageFilter)
>>
>> I put a shell example here:
>> http://www.itk.org/Wiki/ITK/Examples/ImageProcessing/RegionalMaximaImageFilter
>>
>> I'm not exactly sure what this filter is supposed to do. If someone
>> can modify the CreateImage function so that the resulting filtered
>> image demonstrates the point that would be great.
>>
>> David
>> _____________________________________
>> Powered by www.kitware.com
>>
>> Visit other Kitware open-source projects at
>> http://www.kitware.com/opensource/opensource.html
>>
>> Kitware offers ITK Training Courses, for more information visit:
>> http://www.kitware.com/products/protraining.html
>>
>> Please keep messages on-topic and check the ITK FAQ at:
>> http://www.itk.org/Wiki/ITK_FAQ
>>
>> Follow this link to subscribe/unsubscribe:
>> http://www.itk.org/mailman/listinfo/insight-users
>>
> _____________________________________
> Powered by www.kitware.com
>
> Visit other Kitware open-source projects at
> http://www.kitware.com/opensource/opensource.html
>
> Kitware offers ITK Training Courses, for more information visit:
> http://www.kitware.com/products/protraining.html
>
> Please keep messages on-topic and check the ITK FAQ at:
> http://www.itk.org/Wiki/ITK_FAQ
>
> Follow this link to subscribe/unsubscribe:
> http://www.itk.org/mailman/listinfo/insight-users

-- 
Gaëtan Lehmann
Biologie du Développement et de la Reproduction
INRA de Jouy-en-Josas (France)
tel: +33 1 34 65 29 66    fax: 01 34 65 29 09
http://voxel.jouy.inra.fr  http://www.itk.org
http://www.mandriva.org  http://www.bepo.fr