The bottom of the Sea has some fascinating historical secrets, but unlike the monuments on land, they are basically hidden outside of view.
Now, British archaeologists are using 3D printing
technology to bring two historic shipwrecks to history lovers and experts.
Data using photographic measurements (
Measure the distance between the object and the photo)
And sonar imaging, the researchers have made a scale model of the 17 th.
Drumbeg near the shipwreck of the century, in Scotland, and the remains of HMHS Anglia, a steamboat used as a floating hospital during World War I.
The ship was sunk by mines on the southern coast of England.
\"This is a proof of concept for us to try to determine what can be done using sound and light, but you can use it for many different applications, marine archaeologist John McCarthy says a project manager at the Wessex archaeological company, diving at the Scottish site, is responsible for making 3D models.
Related: Photo: Deep sea wreck \"people can get in touch with the physical objects in front of them more easily.
\"You can bring it to schools and conferences, and once we \'ve finished these models, we want to donate them to the local museum,\" McCarthy told Live Science . \".
It\'s not particularly difficult to create 3D --
McCarthy said the seals of these shipwrecks.
The magic thing, he says, is to create a virtual model that inputs a 3D printer.
In 2012, McCarthy, along with his colleague Jonathan Benjamin, conducted a preliminary experimental investigation into the Drumbeg wreck, and Jonathan Benjamin is now a lecturer at Flinders University in Australia.
McCarthy recently started his PhD with him. D.
Study under Benjamin\'s supervision
At the scene of the Drumbeg wreck, the couple found three heavily rusted cannons with evidence of a well-preserved wooden hull underneath.
The identity of the ship is still unknown, but there is a theory that it is a Dutch trade vessel called the Coronation Crow, known to have been lost in the Bay in the 1600 s.
After realizing that the technology they used could provide enough data for the 3D model, archaeologists went back in 2014 to do a more detailed investigation and took advantage of the lessons they learned from their first attempt.
Archaeologists use a technique called photographic measurement that includes taking hundreds of overlapping photos of a site and then entering them into a computer program that can stitch them together.
The app is able to establish a spatial relationship between photos, which enables it to create
Called 3D point cloud, map each image in 3D space.
\"Once you have the point cloud, you can turn it into a solid surface,\" McCarthy said . \".
\"Then you have a 3D model of the site, which is not subjective, nor the impression of the artist, but completely objective.
\"The good thing about photography is that it produces very high
The resolution image, McCarthy says, can capture the real color of the site.
However, due to excessive growth of the ocean or poor visibility, this method is easily hindered and has poor results
Suitable for large area coverage.
On the other hand, sonar can see through murk and cover larger areas, McCarthy said. For the 329-foot-long (100 meters)
Another team at Wessex Archaeology, HMHS Anglia, uses multi-beam sonar
It works like a laser scanner.
Conduct a larger investigation into the site of the wreck
Although the multi-beam sonar cannot match the sub-centimeter resolution of the photographic measurement, a higher resolution is used
The end device and multiple passes can improve accuracy, says McCarthy.
Anglia\'s investigation is a particularly high one.
Resolution 1 is part of the reason it was selected as a 3D printing project, he added.
McCarthy pointed out that the Wessex archaeological team is not the first to create 3D-
Print models from underwater imaging data.
He said that in recent years, with the great progress of sonar and photography technology and even some new laser technology, this field has been booming.
The scanning method has begun to appear.
\"All marine archaeologists are now using these technologies heavily,\" McCarthy said . \".
\"The advances in hardware and software over the last five years have allowed us to conduct very fast and inexpensive surveys, which also adds to the tools we use underwater.
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