Abstract:
The Visualization ToolKit (VTK) is an open source, freely available software
system for 3D computer graphics, image processing, and visualization used by
thousands of researchers and developers around the world. VTK consists of a C++
class library, and several interpreted interface layers including Tcl/Tk, Java,
and Python. Professional support and products for VTK are provided by Kitware,
Inc.
... VTK supports a wide variety of visualization algorithms including scalar,
vector, tensor, texture, and volumetric methods; and advanced modeling
techniques such as implicit modelling, polygon reduction, mesh smoothing,
cutting, contouring, and Delaunay triangulation. In addition, dozens of imaging
algorithms have been directly integrated to allow the user to mix 2D imaging /
3D graphics algorithms and data. The design and implementation of the library
has been strongly influenced by object-oriented principles
http://www.vtk.org/ 
