[vtkusers] Trouble blending two 3d images

[kenichiro yoshimi]

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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