How to use Png Reader to geneate ImageData

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1

Hi. I am new to VTK and I am wondering as to how I can generate Image Data after using png reader. Any form of help would be appreciated. Thanks!

2

There’s an example for this here :https://lorensen.github.io/VTKExamples/site/Cxx/IO/PNGReader/

This example sets up a pipeline to read the file and pass the output directly to a viewer. If you need to get the actual vtkImageData you can extract it as follows (I work mostly in Python so the following C++ may not be correct…)

// This is from the exmple
vtkSmartPointer<vtkPNGReader> reader =
vtkSmartPointer<vtkPNGReader>::New();
reader->SetFileName(argv[1]); 

reader->Update()
vtkSmartPointer<vtkImageData> imageData;

imageData = reader->GetOutput()