[vtkusers] Convert RGB to greyscale

[Jérôme]

Hi,
You can use either vtkImageMagnitude or vtkImageLuminance.

HTH
Jerome

2010/3/4 Christian Werner <christian.werner at rwth-aachen.de>

> Hello!
>
> Maybe I am blind, but I don't find any filters for converting from RGB(3
> scalars) to greyscale(1 scalar). I found vtkImageHSVToRGB and such, but not
> this one.
>
> Best regards,
> Christian
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