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Fig. 1 AutoCAD Drawing file of the Malvasia area
Using Microstation SE and rendering techniques a series of
images were created and composed. A fly-through video
sequence around the object's model has been created as an AVI
file format that can anyone use to fly virtually around the castle.
Additionally, Microstation SE provides the ability to export the
textured model of a CAD model in a VRML format file. This
way interactive navigation around the area of the castle became
feasible through Internet.
Fig. 2 Draped image model of the Malvasia area
3. VISUALIZATION & MULTIMEDIA TOOLS
AND PRODUCTS
Video sequences of the castle and its surrounding area were
captured using a typical amateur video camera that was
operated by an archaeologist of 5" Ephorate of Byzantine
Antiquities. The video was originally stored in magnetic tape
(VHS) and the Miro DC-20 frame grabber was used to produce
the video sequences in digital form. Finally, the Ulead Video
Studio v.4 Software Application was used to produce the final
digital video product that was created based on a scenario of a
tour around the castle. Appropriate music setting has also been
used in the background. These digital video files consist part of
the visualization material of the official site of the 5" Ephorate
of Byzantine Antiquities and they were also recorded on tape.
Besides, a new type of artificially generated digital video file
based on the virtual tour around the image-draped model, has
been created.
Once the rendered 3D model has been created, a virtual pair of
cameras captured images of the draped model from different
positions. Images taken from these two different positions
contain the epipolar geometry and can be combined to produce
stereo images. In an active polarization system using 3D
glasses, these images can be interlaced producing a 3D scene.
Additional 3D scenes can be produced from any other position
across a virtual path that is drawn above or in front of the
object's model. Finally all the scenes taken along the path
defined by the user have been combined and a 3D video is
generated. (Sechidis et. al., 2001).
The tools that are used to visualize the images and video
sequences are a typical Internet browser and the Window's
Media Player application. In the case of the 3D Video a specific
graphics card with Virtual Reality capabilities must be used.
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