[Insight-users] Example on morphological image enhancement

[Luis Ibanez]

Hi Lino,

Thanks for posting your improvement to this example.

Your Constratined filters have been committed now to
the CVS repository. The example has been updated from
your post, in order to use the new filters.

Please let us know if you find any issues.


    Thanks


      Luis


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Lino Ramirez wrote:

> Hi Luis,
> 
> Following your recommendation about using functors (to avoid the need of
> an internal image) in the morphological image enhancement example that I
> submitted to ITK, I made some changes. I created a couple of functors
> (itkConstrainedValueDifferenceImageFilter.h and
> itkConstrainedValueAdditionImageFilter.h). I called them constrained
> because their output minimum and maximum are in the range of the minimum
> and maximum of the input image 1. I re-wrote the image enhancement example
> using these functors and the filters that I submitted yesterday. All the
> files can be found in the webpage
> 
> http://www.ece.ualberta.ca/~ramirez/itk/MorphologicalFiltering/
> 
> I don’t know if the functors would be of interest to the ITK users. If you
> think they are, you can include them in the toolkit.
> 
> Happy New Year!
> 
> Lino
> 
> 
>>Hi Luis,
>>
>>Here are the grayscale opening and closing filters. I also added tests for
>>the new filters in the files itkMathematicalMorphologyImageFilterTest.cxx
>>and itkBasicFiltersPrintTest.cxx. Please note that I am not using the CVS
>>version of ITK (I am using ITK 1.8). Therefore, the file
>>itkBasicFiltersPrintTest.cxx does not contain some of the tests that were
>>added recently. So, you may have to copy the lines I added (they are
>>identified in the file) and paste them in the CVS version of
>>itkBasicFiltersPrintTest.cxx.
>>
>>Please let me know if you have any question.
>>
>>Happy New Year!
>>
>>Lino
>>
>>
>>>Hi Lino,
>>>
>>>This is great !
>>>
>>>Thanks for contributing this example to ITK.
>>>
>>>It has been committed into the directory
>>>
>>>     Insight/Examples/Filtering/
>>>        MorphologicalImageEnhancement.cxx
>>>
>>>
>>>The section between lines 170-200 can  be converted by
>>>creating a Functor filter. In that way there is no need
>>>to create the internal image.
>>>
>>>It will be great to include in the repository the Opening
>>>and Closing filters that you implemented. Please send them
>>>and we will commit them to the repository. You may want to
>>>add your information in the "\author" Doxygen tag of the
>>>respective classes.
>>>
>>>
>>>
>>>Regards,
>>>
>>>
>>>    Luis
>>>
>>>
>>>-------------------
>>>Lino Ramirez wrote:
>>>
>>>
>>>>Hello All,
>>>>
>>>>I wrote a small example on morphological image enhancement following an
>>>>example I found in the Image Processing toolbox of MATLAB. You can find
>>>>the example at
>>>>
>>>>http://www.ece.ualberta.ca/~ramirez/itk/ImageEnhancement/
>>>>
>>>>The executable and some example outputs using structuring elements of
>>>>different sizes can be found at
>>>>
>>>>http://www.ece.ualberta.ca/~ramirez/itk/ImageEnhancement-bin/
>>>>
>>>>The usage is
>>>>MorphologicalImageENhancement.exe inputImageFile outputImageFile radius
>>>>
>>>>where "radius" is the radius of an itkBinaryBallStructuringElement
>>>>
>>>>If you think it could be useful for other ITK users, I would like to
>>>>contribute it to ITK. Moreover, in writing the code, I had to implement
>>>>a
>>>>Gray Scale Opening (erosion followed by a dilation) and Closing
>>>>(dilation
>>>>followed by an erosion) (Note: they are no the geodesic ones that are
>>>>already implemented in ITK) and a Top Hat (original image – opening)
>>>>and
>>>>Bottom Hat (closing – original image) operations. If you think these
>>>>operations should be in ITK, I could try to implement them as filters.
>>>>
>>>>Any feedback about the example will be really appreciated
>>>>
>>>>Have a nice day
>>>>
>>>>Lino
>>>>
>>>>P.S. I also have available the example using the geodesic morphological
>>>>filters available in ITK
>>>>
>>>>_______________________________________________
>>>>Insight-users mailing list
>>>>Insight-users at itk.org
>>>>http://www.itk.org/mailman/listinfo/insight-users
>>>>
>>>>
>>>
>>>
>>>
>>>
>>>
>>>
> 
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