VTK: VTK (The Visualization Toolkit) VTK: VTK: The Visualization Toolkit (VTK) is an open source, freely available VTK: software system for 3D computer graphics, modeling, image processing, VTK: volume rendering, scientific visualization and information VTK: visualization. VTK also includes ancillary support for 3D interaction VTK: widgets, two and three-dimensional annotation, and parallel VTK: computing. VTK: VTK: Homepage: http://www.vtk.org/VTK/project/about.html VTK: