[Insight-users] Projection image filter ?

[Gaetan Lehmann]

Hi,

I would like to disagree with the choice of AccumulateImageFilter to  
implement those new features, for several reasons:
+ it would be painful to implement and inefficient because of the lack of  
usage of functor
+ the result would be difficult to extend, once again because of functors
+ the type of the output image may be dependent of the computation done
+ the enum are not usable with wrappers
+ if I modify AccumulateImageFilter to use functors, I will break the  
current API, and perhap's also the child classes of AccumulateImageFilter

The approach used in Peter's filter seems much better to me.

My thought is to make a base ProjectionImageFilter<InputImageType,  
OutputImageType, Functor>, and several subclasses which provides the  
functor MaximumProjectionImageFilter<InputImageType, OutputImageType>,  
MinimumProjectionImageFilter<InputImageType, OutputImageType>,  
MedianProjectionImageFilter<InputImageType, OutputImageType>,  
SumProjectionImageFilter<InputImageType, OutputImageType>,
MeanProjectionImageFilter<InputImageType, OutputImageType>,
...

Please, let me now what you think about that, so I can began to implement  
it in a way which makes everybody happy :-)

Gaetan

On Thu, 19 Jan 2006 20:51:52 +0100, Karthik Krishnan  
<Karthik.Krishnan at kitware.com> wrote:

>
>
> Gaetan Lehmann wrote:
>
>> On Thursday 19 January 2006 19:02, Miller, James V (GE, Research) wrote:
>>
>>> Gaetan,
>>>
>>> AccumulateImageFilter will do this for projection along the X, Y, or Z
>>> axes.
>>>
>>
>> Yes, I want to project the image along one of the main axis, but the  
>> AccumulateImageFilter seems to be limited to the sum or the mean of all  
>> pixel on the axis, while I want the maximum intensity projection :-/
>> Some other statistics parameters may also be interesting, like minimum,  
>> mean, median, variance, ...
>>
>> I think projection is a quite common operation in image analysis.  
>> Should I create a new filter ?
>>
> I would propose adding it to AccumulateImageFilter with enums to dictate  
> appropriate operations (mean, min, MIP etc).
>
>>
>>
>>> If you want to project along an arbitrary axis, you could use a  
>>> combination
>>> of the ResampleImageFilter and the AccumulateImageFilter.
>>>
>>> Alternatively, you could use the ResampleImageFilter with a
>>> RayCastInterpolateImageFunction.
>>>
>>> Jim
>>>
>>> -----Original Message-----
>>> From: insight-users-bounces+millerjv=crd.ge.com at itk.org
>>> [mailto:insight-users-bounces+millerjv=crd.ge.com at itk.org]On Behalf Of
>>> Gaetan Lehmann
>>> Sent: Thursday, January 19, 2006 7:49 AM
>>> To: insight-users at itk.org
>>> Subject: [Insight-users] Projection image filter ?
>>>
>>>
>>>
>>> Hi,
>>>
>>> Is there a filter in ITK to project an image along an axe. Something  
>>> like
>>> the code in chapter 11.3.4 on the ItkSoftwareGuide, but in a filter.
>>>
>>> Regards,
>>>
>>> Gaetan
>>>     
>>> ------------------------------------------------------------------------
>>>
>>> _______________________________________________
>>> Insight-users mailing list
>>> Insight-users at itk.org
>>> 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