Full text: Close-range imaging, long-range vision

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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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