Tuesday, 30 August 2016

Mandrone WW1 Project

On August 25th and 26th 2016 a team of divers and archaeologists has explored the bottom of lake Mandrone (2.409 m.a.s.l.), Adamello Alps/Italy. Under the direction of prof. Tiziano Camagna, the team has localized and documented the wrack of a boat build there during World War I.


Team-leader Tiziano Camagna was supported by the archaeologists of Arc-Team Ltd. (Cles/Sexten – Italy), Alessandro Bezzi, Luca Bezzi and Rupert Gietl. Massimiliano Canossa and Nicola Bonisegna, underwater-experts from NauticaMare DiveTeam, have realized high-resolution videos and photos.

The main target of the mission was the localization and documentation of the wooden remain on the ground of lake Mandrone. The boat was build between 1916 and 1918 and sank some years after the end of WW1. Pictures and videos taken by the divers will now be processed by the archaeologists in order to extract a detailed 3D model using Computer Vision technologies like SfM (Structure from Motion) and MVS ( Multiple View Stereovision).

Tiziano Camagna first localized the remain in 2004, comparing it with two historical photos published by Luca Viazzi in the volume "I diavoli dell'Adamello - 1915 -1918 La guerra a quota tremila". The first shot is showing Italian mountain troops (Alpini) building a boat near the “Julius Payer” refuge, situated about 800m northeast from lake Mandrone. The second Capt. Castelli rowing on the lake.

The Adamello Alps have been one of the highest war theaters of WW1. In the area around lake Mandrone and the refuge “Città di Trento” we can still find lots of archaeological remains of that period: Trenches, barracks, observation positions and a small military cemetery.


Austro-Hungarian and Italian troops had not only to fight against each other, but primarily against the harsh climate on altitudes up to 3.900 m.a.s.l., 10-12 meters of snow in the winter and temperatures right down to -30°C (-10°F).

Thanks to the support of the wildlife park “Adamello-Brenta” and the Gallazzinis, tenants of the refuge “Città di Trento”, the equipment of our expedition was transported on site with the goods cable lift of the refuge. The team went up by foot, walking about three hours starting at the head of “Genova” valley. On the last stage, from the refuge to the lake, the gear was carried on the back.
In order to facilitate the transport, divers choose light equipment like the sidemount system.
During the dive our photographer Nicola Boninsegna localized a wooden trunk on the ground, a discovery that gives rise to some new research questions, considering the total absence of trees on that altitudes. 

The find will be analyzed soon, in order to get dating and identification of the species.


This mission was also an opportunity for a high altitude test of our ROV prototype (Remotely Operated Vehicle), named ArcheoROV developed by WitLab laboratories from Rovereto, in collaboration with Arc-Team.



Last but not least the team wants to thank the Department for Cultural Heritage of Trento (Office of Archaeological Heritage) for close cooperation.

Monday, 29 August 2016

Archaeologist: A 360° Profession

Following this blog, it may seem that modern archaeology consists mostly of hacking, compiling software and staring blankly at the computer-screen.

But fortunately it's not always like that!

Maintenance of cultural goods, for example, is a big challenge.
Arc-Team is proud to contribute to that on numerous occasions.
Like in this video: Two of us are members of the board of trustees "Schloss Welsperg". The castle was build in the 12th century and is cared by that association since 1989.

Watch us doing forestry work along the curtain wall of the Castle Welsperg:


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Monday, 22 August 2016

St. Paolina Visintainer. Recovering a lost smile

Thursday 9th June 2016 in Vigolo Vattaro (Trentino - Italy) was held a conference regarding the figure of S. Paolina Visintainer, who was born in this town in 1865, and in general the immigration issue. 
Among the other interesting contributions, a special mention has to be made for the work about Italian immigration in Brazil during the XIX century, presented by Cesar Augusto Prezzi, which focused on the states of Rio Grande do Sul and Santa Caterina. This research illustrated the hard journey Italian and, in general, European migrants had to face to reach the new world, often losing their relatives along the way (in many cases buried at sea), in order to escape poverty and war (a story that sadly remembers the current travel of refugees).


Ship with immigrants in Santos

Our (Arc-Team) contribution to the conference regarded a more particular topic, connected with the person of St. Paolina: her Forensic Facial Reconstruction aimed to recover her smile. Indeed Mother Paolina is remembered as a smiling and good-natured person, but, due to the fact that the only photo we have were taken in sad moments of her life, we have no representation of her more natural expression. From this singular issue, +Cícero Moraes  started to work in order to recover her lost smile, with the help of the artist Mari Bueno and Prof. José Luis Lira.
Here below I uploaded the video of the presentation I gave during the conference, in which are presented the partner of the project, the main work-flow and the final result:



while here is the clip shown in the final part of the slides:




Have a nice day!

Saturday, 13 August 2016

Glacial Finds from the Langgrubenjoch (Gde. Mals and Gde. Schnals) in South Tyrol. Preliminary Report


We've published a preliminary report in german language about our project on Langgrubenjoch (South-Tyrol) in the german journal Archäologisches Korrespondenzblatt.
It has a profile as a topical scientific journal on issues of Prehistoric, Roman and Medieval archaeology and related sciences in Europe. Beside topical debates the journal provides a place for the publication of new finds and short analysis of general interest. (Definition by RGZM)
Bringing home the finds

Finds from thawing névés and ice fields were discovered at the Langgrubenjoch (3017 m a. s. l.) between Matscher- and Schnalstal in the southern Ötztal Alps. The finds are predominantly made up of wooden parts, many of which are fragments of boards and show tool marks. 
GPS
First radiocarbon and dendro dates reveal artefacts dating back to the Copper Period, middle to late Bronze Age as well as the Roman period. The toolmarks and comparable finds suggest that the pieces of boards consisting of larch (Larix decidua) were the remains of the roof shingles of a late Bronze Age hut. 
Parallel documentation with Geopaparazzi
Although the Langgrubenjoch cannot be crossed easily it is the shortest route between the Obere Vinschgau in the area of Mals and Schnalstal and the region north of the alpine main ridge. The periods of time indicated by the finds, i. e. the late 3 rd and 2 nd millennia BC as well as the Rom an period, witnessed a relatively low extent of the glaciers or warm phases.

Documentation
In those times the Langgrubenjoch was possibly easier accessible and therefore used more intensively.

Glacial Finds from the Langgrubenjoch (Gde. Mals and Gde. Schnals) in South Tyrol. Preliminary Report

Authors:
Alessandro Bezzi, Giuseppe Naponiello, Rupert Gietl (Arc-Team)
Hubert Steiner (Cult. Heritage Dep. of South-Tyrol)
Kurt Nicolussi, Thomas Pichler (Uni Innsbruck)

Archäologisches Korrespondenzblatt 46 (2016) 167-182.

Related postings & videos:

Thursday, 11 August 2016

geTTexture goes portable

Hi all,
as I wrote in this post, I am building a very simple Android app in order to use geTTexture (the automatic Soil Texture Tirangle +Giuseppe Naponiello  developed) from the mobile, directly on the field. 
Thanks to the work of +Giuseppe Naponiello  the website is now optimized also to be viewed from a mobile's monitor (due to the fact that now the Soil Triangle can be automatically scaled), so that if you have an internet connection on your excavation, you can use geTTexture to define the soil texture of your archaeological layers in a semi-automatic way.
Here below are two screenshots of the mobile app:


geTTexture mobile (upper screen)
geTTexture mobile (lower screen)

By now the mobile app is a simple link the geTTexture developed with MIT App Inventor. Nevertheless I uploaded also the source code of the project on Arc-Team's githup repository (released under General Public license), where you can find also the main software (released under Creative Commons Attribution). Here you can find the binary apk file, to install the app on your mobile. If you want to use geTTexture on your PC or laptop, than you can use this direct link.
Have a nice day!

Monday, 8 August 2016

Kinect, a sleeping research branch reacivated

As you probably noticed, one of the topic of ATOR is related with hardware hacking, with the aim to build new archaeological devices from ordinary objects and tools (33).
This concept is close to the one of "reuse" (using an artefact for a purpose which is completely different from the original function), a pretty common phenomenon in archaeology; also in architecture there is something similar,  called "spolia" (but maybe our interest in hacking things is just a kind of McGiver syndrome of people grown up in the 80s).
However, this post is about hacking a common game device like Kinect to use its characteristic in archaeological 3D real-time documentation. If you are a regular reader of ATOR, you will know that we already face this challenge, performing a first test (1) with RGBDemo in February 2012, and controlling accuracy and precision of the device in March of the same year (2), after a discussion with some of the researchers of FBK, during the workshop "Low cost 3D: sensori algoriti e applicazioni". Due to the encouraging results achieved in our first experiments, we worked on the hardware in order to modify it for outdoor projects (3), but soon we experimented the limits of this technology when applied in areas with direct sunlight (4) or in documenting small objects (5, 25). Despite this drawbacks in our research, Kinect worked pretty good in indoor excavations (6), helping us in difficult situations (related with the the workplace safety), and for particular purposed, like for infra-red prospections in dark environment (7).
After all these experiences, our final advice about Kinect is that the device has a potential in archaeology, but its real employment in professional work is restricted to peculiar conditions, while in most of the cases the SfM-based techniques are the best option (due to their versatility, which makes them a perfect choice during missions abroad (8), for small finds documentation (9, 10), for underwater and aerial archaeology (11, 12, 13), considering also the speed which characterize SfM and MVSR open source software development (14) and the wide range of possibilities between the different tools (15, 16).
Well, at least this was our opinion until now... Currently we are changing our mind about Kinect, and this is due to our professional engagement in underground archaeology (17) and to our renovate interest in robotics. Let's deal with these two points separately.

Underground archaeology

Documenting an underground semisubmerged structure in Firuzabad (Iran)

Like any other operation in archaeological 3D documentation, the tolerance regarding accuracy and precision is variable and influenced by some factors, and mainly: research purposes, logistics, characteristics of the structures to be documented.
Without considering some important exceptions (e.g prehistoric rock shelter, which are often simple to document with SfM techniques), most of the structures related with underground archaeology (WW1 artificial caves, medieval mines, etc...) are connected with large scale survey projects (where it is important a "big data" approach, raising the tolerance in data acquisition to increase the number of documented structures); with logistically difficult areas (high mountains, glaciers, (18, 19) etc...); with structures often characterized by vast surfaces without important small details, which (when present) can be recorded with a targeted SfM or RTI (21, 22) documentation (e.g. for graffiti, inscriptions (20), manufacture traces, etc...). For this reason, in most of these projects, it is necessary to deal with precision in documenting (keeping checkpoints thanks to other TOF instruments, like total stations) in order to gain a real-time response from the selected device, and, under this point of view, Kinect is often a good solution, considering also that its infrared sensor helps very much in low light conditions (7).

Documenting WW1 caves in Southtirol (Italy)

Archeorobotics

Arc-Team's UAV during an aerial archaeology project in Storo (Trentino - Italy)

Since 2006, when we joined an aerial archaeological project in Armenia (23), we started to work on "archaeorobotics", trying to develop robotic devices able to help us in the most difficult archaeological missions.
The first positive results we reached in this field were related with aerial archaeology and the building of an open hardware UAV (in 2008), even if at the beginning we underestimated the time needed to practice with our new tool  (24). Soon our experience increased as we built different drones, based on open and closed solutions (like kk multicopter (26) or Naza dji (27) models). The benefits of this research branch were clear (28, 29) and soon other research institutions, like the CNR-ITAB of Rome (30), the University of Lund (31) and  the CNR-ISTI of Pisa (32), asked us to give lessons about this topic.
Another field of archaeorobotics we explored is the one related with CNC machines and especially with 3D Printers. For this topic a precious help came from the society Kentstrapper and Leonardo Zampi (aka +Exekias 87), who helped us in 3D printing the cast of the Taung Child (34, 35). Since RepRap project started (in 2005), 3D printers evolved very fast. Of course our interest regarding these machines is mainly oriented to Cultural Heritage, and this is also the reason why we built a Fa)(a 3D form scratch (36), but results with this kind of instruments can be very impressive, especially considering the wide range of scientific applications (37, 38, 39, 40, 41), even if sometimes you have to deal with difficult boolean operations (42).
However, none of the robotic projects we developed till now needed Kinect, being based on UAV, to 3D document archaeological sites, or on CNC machines, to fast replicate archaeological artefacts. Our renovate interest in Kinect for archeorobotics is due to our new challenge in developing a ROV (Remotely Operated Vehicle), in order to assist us in our underwater archaeological missions. Indeed, in the last months, we started a collaboration with the WitLab, the FabLab of Rovereto (Trentino - Italy), to develop a new Open Hardware ROV, especially designed for archaeological aims. One of the main topic in developing such an instrument is that the new robot will be oriented not only to 3D documentation, but also to the exploration of unknown areas. For such reason SfM and MVS software are no more enough, but we had to start again in testing Open Source SLAM (Simultaneous  Localization And Mapping) algorithms, due to the fact that we need to register in 3D the submerged landscape (Mapping), but also to recover the path the "ArcheoROV" did (Localization) to reach new hidden archaeological evidences (for a better planning of human operations).

Testing the ArcheoROV at night


Testing Open Source SLAM solutions

The importance of SLAM algorithms in exploring devices is the main reason why we started again to experiment Kinect. Indeed, despite Kinect cannot be used as an on-board optical device in our ArcheoROV (due to the infrared camera), this tool is the perfect system to check SLAM software.
If, you ever started in working on robotics, probably sooner or later you stepped into ROS (Robot Operating System), an Open Source (BSD License) collection of software frameworks for robots. Of course SLAM is a very important task for any robotic vehicle, and the ROS package RTAB-Map is a perfect solution to implement this capability into any autonomous or remotely operated machine, like our ArcheoROV. For this reason, before starting experiments in more sophisticated (and complicated) systems, we checked RTAB-Map performance with an old Kinect, and here is the video of the result:



As you can see, the performance of real-time 3D is pretty responsive, respect our old experiments with the Open Source software RGBDemo (also considering that the Kinect used in this video is the first version, and it is now pretty obsolete) and, most important, the localization function within SLAM algorithm works very good. As I wrote at the beginning of the post, our current impression is that this combination of hardware (Kinect) and software (ROS) can be a good solution for underground environment documentation, while the software can be the right choice for archaeological exploring robotic devices.

I hope that this long post will be useful, if you have any feedback, please just write your comment below. Have a nice day!

PS:

we will present the ArcheoROV at the ArcheoFOSS (43) of Cagliari (Sardinia - Italy), this year. Also our partner of WitLab will be with us!

Webography

ATOR:

(1) Kinect, real-time 3D; (2) Kinect accuracy and precision with RGBDemo; (3) Kinect 3D outdoor: hacking the hardware; (4) Kinect 3D outdoor: first test; (5) Kinect 3D limits: documenting small objects; Kinect 3D indoor: excavation test (6); Kinect - Infrared prospections (7); Aramus 2014: 2D and 3D documentation of archaeological excavation (8); 3D for archaeological finds (9); Taung Project: 3D with SfM & IBM (10); Extreme SfM: underwater archaeology (11); From drone-aerial pictures to DEM and ORTHOPHOTO: the case of Caldonazzo's castle (12); Documentation of a bas-relief on a cliff : the workflow (13); CMVS/PMVS2 40% faster (14); OpenMVG VS PPT (15); MicMac and PPT: two FLOSS solutions for 3D data (16); SfM for Underground Documentation (17); Archaeology as a profession (18); Glacial Archaeology: About the challange to work in extreme conditions (19); WW1: High Alpine Survey Data - Work in Progress (20); Arc-Team tries Large Scale Reflectance Transformation Imaging (RTI) (21); WebRTIViewer (22); UAVP (Universal Aerial Video Platform) (23); UAVP indoor flight (24); 3D documentation of small archaeological finds (25); Building an Xcopter (26); Arc-Team's UAVP: testing the NAZA dji (27); Xcopter drone and SFM techniques (28); ArcheOS and UAVP for archaeological remote sensing (29); Open Source Remote Sensing Platform (30); Remote sensing with UAV in archeology (lessons at Lund University) (31); Aerial archaeology with FLOS Hardware and Software (32); A DIY endoscope for emergencies during excavation fieldwork (33); 3D PRINTING THE PAST: SOME ISSUES (34); The Taung Child is now touchable, thanks to 3d printing (35); 3D printing for Cultural Heritage (36); Space archaeology (37); 3D PRINTING GOOGLE MAPS IS NOW EASY (38); When Veterinary Medicine and 3D printing meet each other (39); Three more animals are saved with the aid of Blender and 3D printing (40); Augmented Reality at Cultways (41); Boolean operations - the powerful Cork! (42); ArcheoFOSS 2016 in cagliari! (43)

Kentstrapper website: http://kentstrapper.com/

Fa)(a 3D website: http://www.falla3d.com/

WitLab website: http://www.witlab.io/

ROS website: http://www.ros.org/

RTAB-Map website: http://introlab.github.io/rtabmap/

Friday, 29 July 2016

Automatic Soil Texture Triangle

As the regular ATOR readers know, since some years we are trying to improve our laboratory's technologies in order to achieve a better metric classification of archaeological data and to expand our research interests in other archaeological sub-disciplines and mainly in archaeo-anthropology (as well as taphonomy and mummiology), archaeo-zoology, archaeo-bothany in general (and carpology and dendrochronology in particular), geoarchaeology and archaeometry. 
Soon we will start a series of post about our lab (aka ATLAB, Arc-Team LABoratory), which is evolving fast thanks to the effort of +Gianluca Fondriest  and +Mattia Segata.
Today I want to illustrate one of the tool we developed to speed up the geo-archaeological interpretation of the soil texture of the different layers during our excavations. This project (which is now in its early stage) starts from the need to use the Soil Texture Triangle to help archaeologists (especially the new diggers) in correctly interpreting the texture components using an objective method like the sedimentation test (because often new archaeologists are not comfortable with more subjective analysis like the Ribbon test or the squeeze-ball test). I leave the explanations of the operations to perform on the field for another post, while I want here to show the small software "geTexture", which +Giuseppe Naponiello developed to use automatically the Soil Texture Triangle from internet.
To illustrate how the application works, I recorded a short videotutorial:




The software is currently just in Italian, but we will translate it in English soon. The development is still active and this can be considered just a pre-release (it will be implemented also with a tutorial explaining how to perform the sedimentation test on the excavation). If you want to help us, on GitHub you can find the source code, while if you need already to use the software, here is the link where is is accessible. In the next days I will try to program also a small app for Android devices.

Stay tuned and have a nice day!

Notes

Some of the results of ATLAB can be seen in the article "Lo Scavo archeologico professionale, innovazioni e best practice mediante metodologie aperte e Open Research" (here in ResearchGate and here in Academia)

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