[vtkusers] window/level concept

Wed Oct 16 13:30:12 EDT 2002

Steffen,

If you think of the image histogram, the window is the range of values that will
be mapped to your display, the level is where in the histogram this range
begins. For example if you have a 4096 bin histogram, a window of 250 and a
level of 1000, this would map bins 1000-1250 full scale onto your display, all
other values would be clipped. The Window/Level concept is also know in
photographic circles as contrast/bightness and for cameras gain/offset....john

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From: Steffen Oeltze <Steffen.Oeltze at Student.Uni-Magdeburg.DE>
@public.kitware.com on 10/16/2002 10:00 AM ZE2

     Steffen Oeltze <Steffen.Oeltze at Student.Uni-Magdeburg.DE>           To:   VTK users                            
                                          @public.kitware.com        <vtkusers at public.kitware.com>                 
                                                                        Cc:    (bcc: John Anast-JM/PGI)            
                                                                Subject:      [vtkusers] window/level concept      
                  Sent by:  vtkusers-admin at public.kitware.com                                                      
                                          10/16/2002 04:00 AM                                                      

Dear VTK-users,

I'm not familiar with the window/level concept of the vtkImageMapper. Could
anybody give me some insight please ?

Thanks,
Steffen

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