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mardi 15 février 2011
Par Bertrand Chazaly le mardi 15 février 2011, 12:00
In year 2008, the A88 motorway construction gave the opportunity to rediscover and excavate two hectares of flint extraction pits.
Just under the topsoil, the pits are not very deep, but they open into radiating galleries.
We were asked to carry out a 3D survey of the pits, using 3D laser scanning technology.
To provide a workable map of the surface, I produced this orthophotography, in which a section of the basement has been overlaid.
click to enlarge
mardi 8 février 2011
Par Bertrand Chazaly le mardi 8 février 2011, 15:55
Although the temple of Karnak is the second most visited monument in Egypt, the decoration of the 134 columns has never been surveyed.
Because of their shape, traditional techniques of representation couldn't be undertaken.
So, after discussion with Emmanuel Laroze, architect and director of the CFEETK (Egyptian and French Center for the study and conservation of the temples of Karnak), we decided to unroll them.
In 2007, we first completed the full 3D scan of the Hall and its 134 columns (3 weeks of measurement) : a pointcloud of 1 billion 3D points has been surveyed !
One year later, we achieved a complete photographic coverage of the columns (more than 4400 images).
Here is a result, produced in year 2005 from a preliminary test, undertaken to validate the method.
click to enlarge
lundi 24 janvier 2011
Par Bertrand Chazaly le lundi 24 janvier 2011, 17:40
Founded in the 15th century, Atturaif was the first capital of the Saudi Dynasty, north-west of Riyadh.
The Unesco World Heritage Committee meeting in Brasilia has inscribed this site in July 2010.
In 2009, I've spent several months there to manage a full 3D scanning and high resolution photography acquisition and processing.
We delivered a high value-added graphical documentation to archaeologists and architects to feed the application to Unesco.
Mohamed Bin
Saud first Mosquee : Click to enlarge
Traditional mud house elevation : Click to
enlarge
Par Bertrand Chazaly le lundi 24 janvier 2011, 15:58
A funny orthophoto of footprints leaved by dinosaurs 155 millions years ago.
Footprints have been painted by paleontologists to follow and study each seropod track.
Click to enlarge
dimanche 23 janvier 2011
Par Bertrand Chazaly le dimanche 23 janvier 2011, 21:54
A true orthophoto with a resolution of 2mm, covering archaeological
excavation in Vieux-la-Romaine (Calvados, France).
More than 400 photos were taken with a nikon D200 + 14mm lens, mounted on a 3m
high portable mast.
The site has been scanned with a long rang 3D laser scanner and the
orthorectification has used a 3D model generated from a 12 millions 3D
pointcloud.
The original image is 27000 x 12740 pixels.
Click on the image to enlarge