[vtkusers] Re: VtkImageBlend does not blend grey level with RGB Image

[David Gobbi]

Hi Pratheek,

The easiest way is to put the RGB image as Input(0) and the
greyscale image as Input(1).  The issue here is that the Output
of vtkImageBlend always has the same number of components as
Input(0), so if you want the output to be RGB then the first
input must be RGB.

If the greyscale image must be on the bottom, then you can turn it
into RGB by passing it through vtkImageMapToColors with a greyscale
color map.  Then you can blend other RGB, RGBA, or greyscale images
on top of it.

 - David

On Sun, 25 Nov 2001, Pratheek Arora wrote:

> HI
>    I am try to blend one dataset of grey scale Image and another is RGB
> dataset, but It is giving me this error " input has too many components,
> can't blend RGB data  into greyscale data "
> Can you please tell me what should I do to blend the grey scale dataset
> with RGB Dataset
> thanks
> with regards
> Prateek