Currently browsing tag

rti, Page 3

ACRG at field-school in Estonia

Ten days ago three members of ACRG visited Estonia to participate at the archaeological field-school. It was organised by Marge Konsa from University of Tartu who also spent several months in Southampton as a visiting research student. Field-school took place in Lihula, a tiny village in West Estonia. County of Läänemaa is filled with great archaeology, so we could enjoy little of it as well. Continue reading →

Underwater RTI HMS Invincible

On February 19th,  1758 the HMS Invincible set sail out of Portsmouth Harbor for Canada to join the British fleet to fight the French.  Unfortunately, due to a domino effect of extraordinary bad luck, she ran aground on Horse Tail Sand not far from the harbor.  Invincible was a French ship launched in 1744 and captured by the British in 1747.  At that time the British out-number the French on the sea. Continue reading →

Underwater Reflectance Transformation Imaging…a success.

I’ve been working on Reflectance Transformation Image capture in a sub-aquatic environment.  On 2 May, 2013 the first ever PTM file from an RTI dataset captured entirely underwater was successfully processed in the Archaeological Computing Research Group computer lab at the University of Southampton using RTIBuilder software.   Images were captured in 1.5 meters of water at the campus Jubilee pool using a common 12mpix digital camera and a 15 watt 1000 lumen HID dive-light. Continue reading →

The voice of Easter Island in the British Museum

Over the past year myself, Hembo Pagi and Graeme Earl from the ACRG have been working with Mike Pitts, editor of the British Archaeology Journal, on the Hoa Hakananai’a statue at the British Museum. The work included the production of a virtual model, through photogrammetry and a series of Reflectance Transformation Images to study the petroglyphs found on the statue. Continue reading →

How to fix incorrectly aligned RTI images

Often, when capturing a RTI data set, especially when using a cable, the images captured can be out of place, resulting in an incomplete data set. The following is a how to guide to fix this problem using Photoshop. The first step is to load all of the files into Photoshop using the correct tool. This is done by clicking the file tab, then Scripts and then “Load files into Stack”. Continue reading →

Reconstructing Portus – Rome’s Lost Empire

Why produce computer models? We have been producing computer graphic representations as part of our work at Portus since 2007. These are used for a number of purposes. Firstly, they help us to bring together all the many forms of digital data gathered on site, through survey, geophysics, photogrammetry, laser scanning and other tools. For example, we are combining three-dimensional geophysics with laser scans and excavated sections to understand the development of the Building 5. Continue reading →

AHRC RTISAD project legacy – 18 months

Another six months have passed, and we have been as busy as ever using the RTISAD equipment and expertise. Dissemination In October Nicole Beale demonstrated Highlight Reflectance Transformation Imaging (RTI) at the Insight from Innovation conference, a three day archaeological ceramics event hosted by the Ceramics Research Group. More details on this blog post. In July Hembo Pagi and Eleonora Gandolfi gave a small presentation about ACRG at the Archaeology department in Perth, Australia. Continue reading →

Infrared RTI: Experimentation towards the development of multispectral RTI

Multispectral Imaging and Reflectance Transformation Imaging (RTI) are both useful imaging tools for the examination of antiquities and works of art.  Previous research proved that RTI contributes significantly in prevention, investigation, examination, analysis and documentation, communication, dissemination and presentation of antiquities and works of art. Continue reading →