Prototypes for automatic RTI– (above) and Photogrammetry-capture (below).
Constructed and visualized in Blender.
Photogrammetry – Examples from Heliopolis
Heliopolis Area 221.
Composit of selected 3D-models captured during the Spring 2016 campaign.
Constructed using Agisoft Photoscan, visualized in Blender.
Click here for more information on the Heliopolis-Project.
Photogrammetry – Selected examples
Some examples of my Photogrammetry work using Agisoft Photoscan and Blender.
Click on the thumbnails below for a 3D view (enable pop-ups).
SfM / RTI – combination tests
This test explores combination possibilities of Reflectance Transformation Imaging and Photogrammetry, using reliable low frequency depth with high absolute accuracy from the later, and high frequency surface normal data with high relative accuracy from the former.
For a detailed description of my approach and the results, click here.
SfM – comparing reconstruction parameters
Using tools from CloudCompare and data from the Heliopolis-Project, this test aimed to determine the effects of different settings for dense cloud reconstruction in Agisoft Photoscan, and how they relate to processing time and accuracy.
Click here for a detailed description and results.
Heliopolis-Project
Duration: ongoing
Within the framework of the newly founded cooperation with the Heliopolis-Project, the Department of Surveying and Geo-spatial Information Technology at the University of Applied Sciences Mainz aims to, among other things, provide guidelines to ensure the quality and integrity of computational photography and photogrammetry methods used on site.
During the Spring 2016 campaign, the Mainz-based Heliopolis-branch concentrated on establishing ground rules for the reliable, economical and scientifically sound on-site acquisition and processing of Photogrammetry-data. Our software of choice was Agisoft PhotoScan, mainly due to it’s performance and level of parameter control in comparison with similar packages.
Using the data collected on site, we were able to identify fallacies in regular data-capture practices particular to the nature of the site, as well as bottlenecks and possible overheads in the processing pipeline. This formed our basis to develop an empirical, step-by-step approach to the data acquisition on site, as well as to the subsequent data-processing. These efforts were finally condensed into instructional guides tailored to the specific needs of the Heliopolis Project.
To meet the upcoming challenges of increased digital data volume due to the more widespread use of photogrammetry in the project, we also developed internal guidelines establishing fixed data nominations as well as an internal meta-data model and a digital archive structure, thus adhering to scientific archiving standards for digital data and simultaneously ensuring their longevity.
The collected 3D data will serve as a basis for dynamic virtual reconstructions of the site in later phases of the Heliopolis-Project.
The recent discovery of a colossal Satue of Psamtik I. has further confirmed the site’s importance as the most important religious centre of its time. The methods established by i3mainz played a substantial role in the documentation of this extraordinary find.
i3mainz
Duration: Jan 2015 – Dec 2015
After my graduation, I gained employment at the Institute for Spatial Information Technology and Remote Sensing (University for Applied Sciences) in Mainz, Germany. Here, I assist different digital humanities projects and lead courses in applied Photogrammetry and RTI. Additionally, I undergo extensive IT training, gaining proficiency in coding and deepening my knowledge of geospatial information technologies and remote sensing applications in the humanities.
Hattusa Temple I – Project
Duration: Nov 2011 – Dec 2014
The primary goal of this DFG-funded project was a thorough evaluation of philological and archeological clues that could lead to a more detailed reconstruction of the archives of the Great Temple at Ḫattusa/Boğazköy, the capitol of the Hittite empire (ca. 1600-1180BC). These clues included its localization, dating, hosted tablet categories and relation to other archives in the city complex.
As a scientific assistant, I focused on the archeological aspects of excavations at Ḫattusa/Boğazköy. My tasks included the georeferencing of old maps and plans, as well as the reconstruction of excavation events from the first campaigns using old photographs and manuscripts.
Tall Zira’a
The Tall Zira’a forms the nexus af the Gadara region in the Wadi al’Arab (Jordan). Its 5000 year long settlement history has been studied since 2003 by the BAI Wuppertal in cooperation with the DEI Jerusalem and the DEI Amman.
As an excavation assistant on the Tall Zira’a-project, I was able to collected my first experiences in the Near East, and was introduced to digital photogrammetry methods and aerial photography using unmanned aerial vehicles (UAVs).