[vtkusers] Trouble blending two 3d images

[Bill Lorensen]

Please provide a small compilable example that illustrates the problem.

On Mon, Aug 14, 2017 at 10:43 AM kenichiro yoshimi <rccm.kyoshimi at gmail.com>
wrote:

> Hi Andaharoo,
>
> How about compiling with debug and using DebugOn member function on
> the blendFilter?
>   blendFilter->DebugOn();
> It may display additional information related to the problem.
>
> Regards,
> yoshimi
>
> 2017-08-13 17:28 GMT+09:00 Andaharoo <Andx_roo at live.com>:
> > I have two 3d images that I'd like to blend and then display in
> imageViewer2.
> > Here's the code:
> > // Create the mask image based off input
> > maskImage = vtkSmartPointer<vtkImageData>::New();
> > maskImage->SetDimensions(inputImage->GetDimensions());
> > maskImage->SetSpacing(inputImage->GetSpacing());
> > maskImage->SetOrigin(inputImage->GetOrigin());
> > maskImage->AllocateScalars(VTK_UNSIGNED_CHAR, 3);
> > int* dim = maskImage->GetDimensions();
> > // Get pointer to beginning of image
> > unsigned char* ptr = static_cast<unsigned
> > char*>(maskImage->GetScalarPointer(0, 0, 0));
> > for (int i = 0; i < dim[0] * dim[1] * dim[2]; i++)
> > {
> >         // Set and advance the pixel
> >         *ptr++ = 255;
> >         *ptr++ = 0;
> >         *ptr++ = 0;
> > }
> > blendFilter = vtkSmartPointer<vtkImageBlend>::New();
> > blendFilter->AddInputData(inputImage);
> > blendFilter->AddInputData(maskImage);
> > blendFilter->SetOpacity(0, 1.0);
> > blendFilter->SetOpacity(1, 0.5);
> > blendFilter->Update();
> >
> > Unfortunately my program just freezes and pulls up the vtkOutputWindow
> with
> > nothing in it.
> >
> > Also does type matter when using these? I'm trying to blend a grayscale
> > (single float image) with an rgb image (uchar).
> >
> >
> >
> > --
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