Modern Processing Capabilities of Analog Data From Documentation of the Great Omayyad Mosque in Aleppo, Syria, Damaged in Civil War

Abstract

Commission VI, WG VI/4KEY WORDS: Syria, documentation, Aleppo, Great Omayyad mosque, analogue photos, IBMR ABSTRACT:In 1999, a big project for the documentation of the Great Omayyad mosque in Aleppo / Syria under UNESCO was conducted. By end of the last century, still analogue cameras were still being used, like the UMK Zeiss, RolleiMetric System. Digital cameras and digital automatic data processing were just starting to be on the rise and laser scanning was not relevant. In this situation, photogrammetrical measurement used stereo technology for complicated situations, and object and single-image technology for creating photoplans. Hundreds of photogrammetric images were taken. However, data processing was carried out on digital stereo plotters or workstations; it was necessary that all analogue photos were converted to digital form using a photogrammetric scanner. The outputs were adequate to the end of the last century. Nowadays, after 19 years, the photogrammetric materials still exist, but the technology and processing is completely different. Our original measurement is historical and nowadays quite obsolete. So we was it decided to explore the possibilities of the new processing of historical materials. Why? The reason is that in the last few years there has been civil war in Syria and the above mentioned monument was severely damaged. The existing historical materials therefore provide a unique opportunity for possible future reconstruction. This paper refers to the completion of existing materials, their evaluation and possibilities of new processing with today's technologies.

Structure From Motion Processing of Analogue Images Captured by Rollei Metric Camera, Digitized With Various Scanning Resolution

“…Statistical values of set of differences are presented, see Tab. 4 Table 5. RMSE values of check points measured by distinct point measurement in Agisoft PhotoScan compared to the coordinates given by CDW.…”

“…In literature, Agisoft PhotoScan prevails as a photogrammetric software for processing analogue images. Agisoft PhotoScan was used also by [3] to create 3D model of historic buildings, by [4] to process analogue images captured by RolleiMetric camera and UMK camera of Omayyad mosque, by [5] to analyse historic changes of a glacier, by [6] to process archival images captured by Hasselblad H5D-60 of chosen archeological area, by [7] to process analogue non-metric images and by [8] to process analogue aerial images to create DEM and orthophoto. The open-source MicMac was used for processing analogue images by [9].…”

3d Digital Reconstruction Based on Archived Terrestrial Photographs From Metric Cameras

“…The basic 3D output was a dense point cloud of the main facade of the "Post Office Palace". Since the point cloud can be deformed [7], its analysis was performed. The quality of point clouds can be estimated by a comparison with a reference base.…”

“…Historical objects may be e.g. buildings [7][8][9], sculptures, paintings [10], archaeological sites [11,12], natural sites [13], etc.…”

Possibilities of Processing Archival Photogrammetric Images Captured by Rollei 6006 Metric Camera Using Current Method

“…Processing of analog photogrammetric negatives using current methods brings new challenges and possibilities, for example, creation of a 3D model from archival images which enables comparison of historical state and current state of cultural heritage objects (Pavelka, 2017). Studies have shown that processing of analog images using current methods has huge potential in cultural heritage (Maiwald, 2017;Rodríguez Miranda, 2017).…”