[Insight-users] Pixel Intenisty in grey scale

[Luis Ibanez]

Hi Rehab,

Please read the ITK Software Guide

    http://www.itk.org/ItkSoftwareGuide.pdf

in particular the "Data Representation" chapter.

You will find a description of the method

               GetPixel()

and you will find as well a description of
how to use Image Iterators in the "Iterators"
chapter.


The interpretation of the intensity values is
outside the scope of ITK.

You should know what is the image modality of
the images that you are reading inside ITK.

If you are dealing with CT, then you should
get familiar with the Hounsfield units scale:

http://en.wikipedia.org/wiki/Hounsfield_scale


If you are interested in rescaling the instensities
of an image, you may want to consider the

    itkRescaleIntensityImageFilter

http://www.itk.org/Insight/Doxygen/html/classitk_1_1RescaleIntensityImageFilter.html


Regards,


    Luis



-----------------------
Rehab Mansour wrote:
> HI everyone,i need to know a way to retrieve the pixel intensity in  
> ITK........i also need to know  what does the pixel value indicates..for 
> CT images it retrieves negative values is there any way i can rescale or 
> apply any function on this value so i can get the pixel intenisty in a 
> grey level scale from (0 to 255).
> 
> 
> 
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