Fwd: [Insight-users] convex hull filter?
Luis Ibanez
luis.ibanez at kitware.com
Mon Jan 10 10:25:16 EST 2005
Hi Kingaza,
Please read carefully my previous email,
I sent you the results of running the filter
VotingBinaryIterativeHoleFillingImageFilter
^^^^^^^^^
but you are running the filter:
VotingBinaryHoleFillingImageFilter
which is the "non-iterative" version.
What you are doing is the equivalent of running
the iterative filter for only one iteration.
Regards,
Luis
------------------------
kingaza at gmail.com wrote:
> ---------- Forwarded message ----------
> From: kingaza at gmail.com <kingaza at gmail.com>
> Date: Mon, 10 Jan 2005 16:57:55 +0800
> Subject: Re: [Insight-users] convex hull filter?
> To: Luis Ibanez <luis.ibanez at kitware.com>
>
>
> Hi Luis,
>
> Thanks you for your advice
> But I can not repeat your experience
> I run as: (the result in attatchments)
>
> VotingBinaryHoleFillingImageFilter kidney.png kidneymask1.png 2 2 50
> VotingBinaryHoleFillingImageFilter kidney.png kidneymask2.png 3 3 50
> VotingBinaryHoleFillingImageFilter kidney.png kidneymask3.png 4 4 50
> VotingBinaryHoleFillingImageFilter kidney.png kidneymask4.png 5 5 50
> VotingBinaryHoleFillingImageFilter kidney.png kidneymask5.png 5 5 150
>
> I have no idea about this mistake
>
> bty, the version is:
> Module: $RCSfile: VotingBinaryIterativeHoleFillingImageFilter.cxx,v $
> Language: C++
> Date: $Date: 2004/12/28 14:41:45 $
> Version: $Revision: 1.3 $
>
> regards,
> kingaza
>
>
> On Sun, 09 Jan 2005 11:11:57 -0500, Luis Ibanez <luis.ibanez at kitware.com> wrote:
>
>>Hi Kingaza,
>>
>>Thanks for posting more details about the
>>problem that you are trying to solve.
>>
>>After looking at your images I still think
>>that you don't need a full convex-hull.
>>
>>Please look at the four attached images
>>that were produced by running the
>>
>> VotingBinaryIterativeHoleFillingImageFilter
>>
>>on the binary mask of the kidney.
>>
>>This was done directly with the source code
>>available at
>>
>> Insight/Examples/Filtering/
>> VotingBinaryIterativeHoleFillingImageFilter
>>
>>The parameters used where:
>>
>> Image Radius Iterations
>>
>>kidneyMask1 2 2 50
>>kidneyMask2 3 3 50
>>kidneyMask3 4 4 50
>>kidneyMask3 5 5 150
>>
>>The actual iterations performed and number of
>>pixel changed were respectively
>>
>> Image Iterations PixelsChanged
>>
>>kidneyMask1 5 59
>>kidneyMask2 17 186
>>kidneyMask3 41 557
>>kidneyMask4 134 1916
>>
>>Please let us know if that processing may fit
>>what you need, or if you need any particular
>>modification.
>>
>> Thanks
>>
>>
>> Luis
>>
>>--------------------------
>>kingaza at gmail.com wrote:
>>
>>
>>>Hi Luis,
>>>
>>>I want to implement registration opration on kidney image (kidney1.png)
>>>considering patient body's motion, I do segmentation first (kidney2.png).
>>>and I think it will be more accurate in registration process if I can
>>>make use of the other issues.
>>>so I want such a filter...
>>>
>>>regards,
>>>kingaza
>>>
>>>
>>>On Sat, 08 Jan 2005 21:57:12 -0500, Luis Ibanez <luis.ibanez at kitware.com> wrote:
>>>
>>>
>>>>Hi Kingaza,
>>>>
>>>>I'm not aware of any filter in ITK implementing
>>>>the convex-hull of a binary image.
>>>>
>>>>Still,...
>>>>I don't quite see why would you need
>>>>the convex-hull of a region...
>>>>
>>>>Regards,
>>>>
>>>> Luis
>>>>
>>>>--------------------------
>>>>kingaza at gmail.com wrote:
>>>>
>>>>
>>>>>Hi Luis,
>>>>>
>>>>>thx for your answer, but actually, I really need a convex-hull operation.
>>>>>could you tell me whether there is some filters to implement such an operation?
>>>>>thx for any tips
>>>>>
>>>>>regards,
>>>>>kingaza
>>>>>
>>>>>On Sat, 08 Jan 2005 10:57:54 -0500, Luis Ibanez <luis.ibanez at kitware.com> wrote:
>>>>>
>>>>>
>>>>>
>>>>>>Hi Kingaza,
>>>>>>
>>>>>>You may want to give it a try to the filter:
>>>>>>
>>>>>> VotingBinaryHoleFillingImageFilter
>>>>>>
>>>>>>http://www.itk.org/Insight/Doxygen/html/classitk_1_1VotingBinaryHoleFillingImageFilter.html
>>>>>>
>>>>>>and
>>>>>>
>>>>>> VotingBinaryIterativeHoleFillingImageFilter
>>>>>>
>>>>>>http://www.itk.org/Insight/Doxygen/html/classitk_1_1VotingBinaryIterativeHoleFillingImageFilter.html
>>>>>>
>>>>>>The second filter is used for running the first one
>>>>>>for a number of iterations.
>>>>>>
>>>>>>These filters will fill-in holes and cavities in
>>>>>>binary images.
>>>>>>
>>>>>>This is not equivalent to a convex-hull, but...
>>>>>>I doubt that you really need a convex-hull operation.
>>>>>>
>>>>>>It seems that what you need is to remove cavities
>>>>>
>>>>>>from the contour... which is what the HoleFilling
>>>>>
>>>>>
>>>>>>voting filters do.
>>>>>>
>>>>>>Note that you will need a CVS version of ITK since
>>>>>>these filters were added to the toolkit *after* the
>>>>>>release 1.8.
>>>>>>
>>>>>> Regards,
>>>>>>
>>>>>> Luis
>>>>>>
>>>>>>------------------------
>>>>>>kingaza at gmail.com wrote:
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>>Hi all
>>>>>>>
>>>>>>>how can i get convex hall from a binary image?
>>>>>>>for example
>>>>>>>0 0 1 1 1 0 ==> 0 0 1 1 1 0
>>>>>>>0 0 0 1 0 0 0 1 1 1 1 0
>>>>>>>0 0 0 1 0 0 0 1 1 1 1 0
>>>>>>>0 1 1 1 1 0 0 1 1 1 1 0
>>>>>>>
>>>>>>>I have tried the filter itkHConvexImageFilter
>>>>>>>but it doesn't work.
>>>>>>>
>>>>>>>regards,
>>>>>>>kingaza
>>>>>>>_______________________________________________
>>>>>>>Insight-users mailing list
>>>>>>>Insight-users at itk.org
>>>>>>>http://www.itk.org/mailman/listinfo/insight-users
>>>>>>>
>>>>>>>
>>>>>>
>>>>>>
>>>>
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