High accuracy three dimensional digitisation based on laser triangulation
Experimental digitisation of objects of different materials (ceramics, wood, glass, marble, gold, etc) were performed during the project.
The morphological characteristics and specialties that we might confront in cultural heritage artefacts were documented.
Case : Byzantine Mani: Digitisation of Church Monuments in the region of Mani, Peloponnese
Digitisation of cultural heritage areas
We have attempted the 3D reconstruction of three settlements without the use of any expensive equipment (e.g. commercial 3D range scanners based on techniques like triangulation, modulation or time of flight).
We have produced a fully textured 3D model that can be easily accessed from the Internet using a VRML viewer plug in for your browser. Acceptable downloading times have been achieved even for PSTN connections by reducing the texture map quality.
3D Digitisation of the Byzantine Castle in Kavala's Prefecture
The equipment used for the digitisation of the castle included, apart from a typical 6MP dSLR camera, a time-of-flight 3D colour range scanner (Optech ILRIS-3D). The raw scan data composed of 36 millions 3D points. These partial scans were merged using the Iterative Closest Point algorithm and with further processing (overlapping elimination, noisy and unnecessary parts removal) resulted a 27 millions 3D points.
The final model is composed by 15,000 polygons and it can be described using the VRML 2.0 format with a total of 430KB (gzip compressed).The size of the texture images was 15 MB compressed using the JPEG algorithm. The texture baking technique has been used to display in real time ambient occlusion shadowing.
Historic virtual walkthrough at the harbour area of Argostoli town of Greek island Kefalonia, as it was before the devastating earthquake of 1952.