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etdips: 95/NT Visualization and Analysis software (Download Now!)

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Rakesh Mullick

Feb 18, 1999, 3:00:00 AM2/18/99
eTDIPS exploratory 2D/3D Image Processing System for volume rendering
and animation of vast 3D datasets.


CieMed has developed a partitioned volume (ParVo) rendering approach
which has been used for creating 3D illustrations and animations of the
Visible HumanTM and Visible EmbryoTM datasets. This approach is one of
the key features of a powerful software toolkit called TDIPS (Two/Three
Dimensional Image Processing System) developed internally by CieMed. An
interactive graphical user interface (GUI) for ParVo in TDIPS offers
simple mouse-based manipulation for numerous volume rendering
parameters. Interactive dialogs and graphical feedback allow accurate
specification of the rendering transfer function, viewpoint parameters,
lighting controls, object rotation, and volume of interest. The color
and opacity values of the transfer function are specified using direct
modification of nodes on a 2D graph. Four light sources can be
specified, with independent control of their location, intensity, color,
attenuation, and specular parameters based on the Phong lighting model.
Other controls for selecting back-to-front or front-to-back compositing,
modifying the sampling period, and over-sampling are also provided.
Furthermore, the system also offers an animation utility based on
key-frames. It allows the user to specify and interactively manipulate
all the rendering parameters at each key-frame, and generates a log file
for batch processing of vast datasets and long animations.

Aside from volume rendering, TDIPS contains a rich set of 3D image
processing and manipulation tools. These include volume analysis (3D
dilation and erosion, edge detection - Zucker-Hummel/Sobel, multivalue
thresholding, conditional averaging), logical and binary operations
(and, or, not, bit-shifts), data reformatting (interpolation,
volume-of-interest, downsampling), 3D convolution filtering,
skeleton-climbing error-free iso-surface rendering, statistical
measurements, volume conversion, and sub-volume manipulation options.
This system also has a simple command line interface which allows inter-
and intra-volume processing of multiple volumes using symbolic names.
TDIPS has an Object-Oriented Design with a multi-level Application
Programming Interface (API): the application development interface,
algorithm development interface, and the command-line interface. This
design significantly adds to the feature set by offering complete
flexibility, expandability, and portability. Currently, the system
runs on the Win 95/NT workstations with OpenGL.

For any further inquiries:
Contact: Rakesh Mullick, Email: OR
Shalini, EMail:
Shehan, Email:

Rakesh Mullick, Email:

Ira Haron

Feb 23, 1999, 3:00:00 AM2/23/99

Ira R. Haron

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