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Chinese body scanner can see through 30 layers of clothing using space tech – scientists

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According to scientists, a full-body scanner made with space radar technology was tested in China and yielded extremely sharp photos through clothing.

According to the experts, its ultra-high resolution could aid in identifying concealed goods with higher accuracy at security checkpoints.

When the technology was tested close to a person, it was found that it could see a logo on their underpants even if they were wearing a coat.

Professor Liu Jinsong’s team at Wuhan’s Huazhong University of Science and Technology placed a sheet of paper with a thumb-sized letter “S” under five different types of popular clothes manufactured from a variety of natural and synthetic fibers.

The scanner created crystal-clear images of the letter “S” for all of them, which is something that existing scanners can’t achieve. It became more hazy as the researchers added more layers, but it was still discernible after 30.

The scanner may “easily detect banned items such as firearms hidden under clothes” with millimetre-level resolution, according to Liu’s team in a report published on Monday in the domestic peer-reviewed journal Optics and Optoelectronic Technology.

According to state media, high-resolution body scanners have already been utilized at China’s airports and border checkpoints.

According to state media, high-resolution body scanners have already been utilized at China’s airports and border checkpoints.

In September, a security officer at Beijing Capital International Airport informed Beijing Daily that the equipment now in use were producing more detailed photographs than the crew had ever seen before.

They use an artificial intelligence-controlled detection system to notify them to any object hidden beneath garments.

According to the Beijing Dail report, the scans reveal any things found on a person’s body on a screen, but the body itself is replaced by an outline “to minimize embarrassment.”

Liu’s scanner, on the other hand, is about the size of a dress mirror and employs 32 small antennae, whereas that scanning equipment takes up an entire room and can be impossible to install in some cases.

“For a traditional radar, the higher the resolution, the bigger the antenna. This is impractical in some situations,” Liu and his colleagues said in the paper.

Synthetic aperture is a technology that allows current military systems, such as satellites, fighter planes, and warships, to reduce the size of their antennas by combining signals from smaller antennas to create a higher-resolution image.

At night or in bad weather, a satellite outfitted with the newest synthetic aperture radar can detect bricks on a pavement.

According to Liu and colleagues, they adjusted existing technologies to meet their goals without endangering human health.

However, their ultra-sharp photos required a human to stand close to the radar, and it was uncertain whether the technology would be tested in an airport. Liu was unavailable for comment.

About a decade ago, full-body scanners were installed in a few main airports in the United States. Even when non-metallic items like plastic and powder were hidden inside a bodily cavity, they could be detected.

There have been complaints of security personnel laughing at passengers’ bodies, but the clarity of the photos was typically inadequate, leading to confusion about a person’s sex.

Some celebrities, such as Miranda Lambert of the United States, have refused to be scanned in favor of a pat-down.

Images obtained by a full-body scanner were saved in a hard drive for a specified period of time, according to a customs employee working in a large airport in southern China, and linked to a passenger’s name and other personal information.

According to the person, who asked not to be identified due to the sensitivity of the subject, protecting this data was critical for airport management since a leak might “develop into a public-relations catastrophe.”

REFERENCE/S:
Chinese body scanner can see through 30 layers of clothing using space tech - scientists|ABS-CBN

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