[Insight-developers] Image statistics on regions of an image

[Luis Ibanez]

I agree, the new class is not as versatile as
the existing LabelStatisticsImageFilter.

I'll CVS remove it.


   Luis


----------------------------------------
Lorensen, William E (Research) wrote:

> I suggest we remove the new class. Jim is correct that
> LabelStatisticsImageFilter does what the user requested.
> 
> Bill
> 
> -----Original Message-----
> From: Miller, James V (Research) [mailto:millerjv at crd.ge.com]
> Sent: Monday, November 08, 2004 9:59 AM
> To: 'Luis Ibanez'; ahuisman at cs.uu.nl; 'insight-users at itk.org'
> Subject: RE: [Insight-users] Image statistics on regions of an image
> 
> 
> Andre, 
> 
> You should take a look at LabelStatisticsImageFilter.  Given an image
> and a label map, it calculates statistics for pixels under each label.
> 
> After running the filter, you can query the 
> 
> 	Minimum
> 	Maximum
> 	Mean
> 	Sigma
> 	Variance
> 	Sum
> 	Count
> 
> for a particular label.
> 
> If you need more "features" than these, please let us know.  We could 
> extend the filter or create a subclass that calculates other features
> over the regions.
> 
> Jim
> 
> 
> -----Original Message-----
> From: Luis Ibanez [mailto:luis.ibanez at kitware.com]
> Sent: Sunday, November 07, 2004 11:27 AM
> To: ahuisman at cs.uu.nl; 'insight-users at itk.org'
> Subject: Re: [Insight-users] Image statistics on regions of an image
> 
> 
> 
> Hi Andre
> 
> Your request was logged into the buck tracking database
> 
>   Bug 1331 (Feature Request).
>   http://www.itk.org/Bug/bug.php?op=show&bugid=1331&pos=0
> 
> and as a first response we added a class
> 
>       itkMinimumMaximumConditionalImageCalculator
> 
> in
> 
>                 Insight/Code/BasicFilters
> 
> This class computes the Minimum and Maximum values
> of an image but considering only the pixels for which
> a second image has a particular pixel value.
> 
> In practice you provide two images to this class. The first
> input is the image from which you want to compute the
> statistics, while the second input is the class that defines
> what pixels to use.
> 
> You can use your labeled mask (the result of your segmentation)
> as second input to this class.
> 
> Please update your CVS checkout in order to get this new class.
> 
> 
> You probably will need other types of statistics for your images.
> If so, the generic way to go will be to add a Conditional Functor
> to the classes in Code/Numerics/Statistics.   You could then create
> your own conditional Functors and instantiate any of the classes
> responsible for computing Histograms.
> 
> A Conditional Functor will be a class that has a Test() method
> returning a Boolean. We could make Functor to be a template
> parameter of the statistical classes, just the way the
> UnaryFunctorImageFilter is implemented.
> 
> Please let us know about types of statistics that you would like
> to compute from your cell images, and whether these images
> are grayscale, Color, or multi-band.
> 
> 
>     Thanks
> 
> 
>          Luis
> 
> 
> ===========================================
> *Andre Huisman* wrote:
> 
> For our research on texture features describing changes in the
> chromatin distribution in cell nuclei we need to do calculations on
> cells. We already have segmentation results (stored in a grey-scale
> image where each cell has a unique constant grey-value representing its
> number), but now we want to compute statistics on those separate cells.
> However, I can not find a method in ITK to compute several statistics
> (for example using <a class="el"
>  
> href="http://www.itk.org/Doxygen/html/classitk_1_1MinimumMaximumImageFilter.
> html">itk::MinimumMaximumImageFilter</a>
> or <a class="el"
>  
> href="http://www.itk.org/Doxygen/html/classitk_1_1MinimumMaximumImageCalcula
> tor.html">itk::MinimumMaximumImageCalculator</a>
> and <a class="el"
>  
> href="http://www.itk.org/Doxygen/html/classitk_1_1StatisticsImageFilter.html
> ">itk::StatisticsImageFilter</a>)
> using a masked image. Of course I can make a bounding box around each
> cell and than compute those statistics, but that will introduce a large
> error for most statistics. <br>
> Are there any possibilities in ITK to use a mask to restrict
> computations on images to certain regions?<br>
> <br>
> Thank you in advance,<br>
> <br>
> Andr&eacute; Huisman<br>
> University Medical Center Utrecht, the Netherlands<br>
> Department of pathology<br>
> 
> 
> 
> 
> 
> _______________________________________________
> Insight-users mailing list
> Insight-users at itk.org
> http://www.itk.org/mailman/listinfo/insight-users
> _______________________________________________
> Insight-users mailing list
> Insight-users at itk.org
> http://www.itk.org/mailman/listinfo/insight-users
> _______________________________________________
> Insight-developers mailing list
> Insight-developers at itk.org
> http://www.itk.org/mailman/listinfo/insight-developers
> 
>