# ReadImageData

VTKExamples/Python/IO/ReadImageData

### Description

This example reads an image data (.vti) file. Example data would be vase.vti.

Other Languages

See (Cxx), (CSharp)

### Code

ReadImageData.py

    #!/usr/bin/env python
    # -*- coding: utf-8 -*-

    import vtk

    def get_program_parameters():
        import argparse
        description = 'Read a VTK image data file.'
        epilogue = ''''''
        parser = argparse.ArgumentParser(description=description, epilog=epilogue,
                                         formatter_class=argparse.RawDescriptionHelpFormatter)
        parser.add_argument('filename', help='vase.vti')
        args = parser.parse_args()
        return args.filename

    def main():
        colors = vtk.vtkNamedColors()

        file_name = get_program_parameters()

        # Read the source file.
        reader = vtk.vtkXMLImageDataReader()
        reader.SetFileName(file_name)

        # Create the mapper that creates graphics elements
        mapper = vtk.vtkDataSetMapper()
        mapper.SetInputConnection(reader.GetOutputPort())

        # Create the Actor
        actor = vtk.vtkActor()
        actor.SetMapper(mapper)
        # show the edges of the image grid
        actor.GetProperty().SetRepresentationToWireframe()
        actor.GetProperty().SetColor(colors.GetColor3d("DarkSalmon"))

        # Create the Renderer
        renderer = vtk.vtkRenderer()
        renderer.AddActor(actor)
        renderer.ResetCamera()
        renderer.SetBackground(colors.GetColor3d("Silver"))

        # Create the RendererWindow
        renderer_window = vtk.vtkRenderWindow()
        renderer_window.AddRenderer(renderer)

        # Create the RendererWindowInteractor and display the vti file
        interactor = vtk.vtkRenderWindowInteractor()
        interactor.SetRenderWindow(renderer_window)
        interactor.Initialize()
        interactor.Start()

    if __name__ == '__main__':
        main()