Hi Gaëtan and ITKers,<br><br>I want to produce an ITK image with the value of the Region Elongation of the itk::LabelCollectionImage.<br><br>In your contribution to the Insight Journal "Labeled object representation and manipulation with ITK", you advise to do it by using the itk::LabelCollectionImageToAttributeImageFilter.<br><br>The type of this filter is instancied using three parameters: TinputImage, ToutputImage and TAttributeAccesor. I donīt know how to define the last type. Which of the contributed classes provide the method to define it? . Could you provide me an explanation of how to do it or one reference to some test code?<br><br>Thank you very much for your advice. <br><br>Juan Paredes<p> 
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