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Church of the Holy Apostles - Column Capital
Date - Timespan: Late Byzantine Era 1204 - 1430 aC

This is a Corinthian column capital from the eastern facade of the church of the Holy Apostles.

The monument was selected to be 3D digitised within the framework of the European Commission funded 3D-ICONS project by the Athena RC Xanthi's Division. It's exterior was captured in 3D using the Structure-From-Motion (SFM) and Dense Multi-View 3D Reconstruction (DMVR) methods. Aerial and terrestrial photoshooting sessions were performed during the winter of 2014 always during cloudy days. A total of four digitisation sessions were performed where each resulted a number of image sequences presenting the monument from different points of views. The terrestrial photoshooting sessions were implemented using camera tripods and custom monopods (3m-9m adaptive). We attempted to keep the distance between two terrestrial photoshooting points at 60cm. All aerial photoshooting was performed using a custom hexacopter equipped with gimbal remote controlled two axis tilt-roll camera base, first-person view (FPV) and GPS. A pair of Samsung NX1000 20MP compact DSLR cameras with fixed 16mm and 20-50mm lenses were used. Agisoft PhotoScan (ver. 1.1) has been used for the production of monument's 3D digital replica. Although, flight paths were designed they have been performed manually due to bad GPS reception (high buildings around the monument). Furthermore, the calibration of the cameras was performed by the software itself. A total of 4090 photos were used to generated the 3D model. The processing of the image sequences was performed on two computer systems (CPU IntelCoreI74820K 3.7Ghz, 64GB RAM, Radeon R9 290X, Microsoft Windows 7 64-bit). Additionally, empirical measurements between strong (in terms of visibility) feature points on the surface of the monument were performed and used to scale the 3D model.

Low Resolution Model: 75K Facets - Image Texture Size:1024^2
Medium Resolution Model: 250K Facets - Image Texture Size:4096^2
High Resolution Model: 1M Facets - Image Texture Size:8192^2
Resolution: ~2cm (between consecutive points distance in raw data model)

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Copyright 2014 Athena Research Centre. All rights reserved. The 3D ICONS project is funded by the European Commissions ICT Policy Support Programme.
For technical enquiries and additional information related to the 3D-ICONS project or the 3D data displayed in this page please contact Dr. Anestis Koutsoudis at akoutsou at ceti dot gr.