In the wilderness of the OFweek smart home network, the two smart figures left and right, running in front of a wild deer is fleeing, behind it is a hungry cheetah. Wild deer cannot decide whether their destiny is to become a delicious dinner or to escape the ascension. It is only because there is no hidden enough concealment to be a Chinese food. Privacy is important, at least in the wild nature. Sometimes there is only one chance to survive. There is no regret. Once the whereabouts are exposed, the full set loses.
From the most primitive point of view, hiding is an instinct to avoid natural enemies, and everyone's interest in seeing camouflage and defense has never been reduced, perhaps because of being hidden in the blood of the instinct, in the most want to have the super power rankings The perspective ability will always be at the top. Some time ago, Lei Fengnet.com found that a paper was published at the Technical University of Munich. Their researchers developed techniques for generating ambient three-dimensional holograms using Wi-Fi signals.
Holographic projection
This means that home Wi-Fi may become a more secretive voyeur, and the hacking camera peeps out after all. Wi-Fi holography means a 360-degree blind vision of God. Once upon a time, Facebook founder Zuckerberg used a physical approach to hacking.
â–² In order to prevent hackers from smashing their hearts, they put a "shame" tape on the camera and microphone.
However, once Wi-Fi holography is implemented
â–² Minutes to experience the simple philosophy of “Outside the Castle Peak House outside the mountain, strong middle school own strong middlemanâ€
According to Lei Feng network editors, the use of Wi-Fi signals to carry out similar "positioning" exploration has never stopped. As early as a few years ago, there were similar technologies. In 2013, researchers at the Massachusetts Institute of Technology developed a technology that uses Wi-Fi signals to observe people's movements across the wall. Not only that, this technology can also create "contour fingerprints" for everyone, breaking through the partition resolution. Specific technical problems.
â–² The so-called contour fingerprint is equivalent to giving a person a perspective world ID ID based on the perspective difference. Each person's outline fingerprint is slightly different.
The team uses a device called RF Capture to send wireless signals. When wireless radiation hits the wall and meets the human body, it reflects the signal back. At this time, RF Capture analyzes the received information and draws out different outline fingerprints. The principle of radar and sonar imaging. According to the team's introduction, the amount of radiation emitted is quite small, which is about one-tenth of the amount of mobile phone radiation.
However, the research at the Technical University of Munich has further advanced the process of such research. What is the effect of generating a hologram with a Wi-Fi signal?
â–² Cross hologram
â–²Using Wi-Fi holography to present warehouse holograms
Inspiration can sometimes be merely a product of a different perspective. Friedemann Reinhard, a researcher at the Technical University of Munich, said that this idea was a fad when lunch, and he just wanted to know what the world would look like from a Wi-Fi signal point of view. So Wi-Fi holography was born. After all, it is not the spring rain but the Wi-Fi signal.
In an era when Wi-Fi is not fidgety and the spirit is abnormal, Wi-Fi's "infiltration" ability is more reliable than spring rain. The Wi-Fi signal sent by the router can be used to generate a hologram of the surrounding environment.
"This technology is like looking at the world from the perspective of Wi-Fi."
Friedemann Reinhard said.
â–² The giraffe writer who has long had insight into the truth has something to say
A holographic scan requires two antennas and an oscilloscope. One of the two antennas is fixed at one place as a reference, and the other is a movable scanning antenna, all of which are connected to the oscilloscope. In fact, the Wi-Fi hologram system captures distortions that occur when microwaves reflect objects. By tracking these distortions, the physicist moves the scanning antenna point by point, and draws a hologram by comparing the readings of the two Wi-Fi receivers when the fixed antenna and the scanning antenna move on the virtual screen. In principle, holograms encode images of any object in the room.
However, I must mention that the technology has just started at this stage and it is still unrealistic to expect to use it to monitor the entire building. Even if it can be done in theory, the cost will be too high. There are two issues:
1. Monitoring a building with such a large volume requires a volume-matched mobile antenna. (skyscraper-like removable antenna)
2. Surveillance is called monitoring because of its hidden nature. It is almost impossible to silently install such a huge antenna. After all, a large rod sticks around the monitored target and is likely to become a monitor. The shame of the session.
However, researcher Philipp Holl added: The problem with mobile antennas is that there are ways to optimize them. Once a method is found, Wi-Fi holograms will achieve higher resolution. To put it plainly, once the technical barriers to mobile antennas are resolved, holograms will be clearer and more powerful.
This Wi-Fi holographic technology may have a wide range of applications in the future, including embedding microwave image data into the camera image to easily track lost items. Imagine a small object, such as a key, that is easily forgotten. In a Wi-Fi environment, you just need to take a photo of your family and you will see that the lost object is lying quietly under the bed.
In the future, this technology can also be combined with the smart home, the user can operate the light television through gestures, or use this technology to adjust the heating by monitoring the position of the user in the room. Even given that Wi-Fi signals have the nature of penetrating the wall, they can be used to find survivors under a collapsed building in a disaster-like emergency such as an earthquake... Personal guessing about the future of Wi-Fi The role may be more for positioning.
In this increasingly transparent world, it is too difficult to defend privacy. The maturity of Wi-Fi holographic technology may inevitably make people feel that their privacy is difficult to protect. But the truth will not be absolute. Human progress comes from curiosity and exploration. We seem to walk in the desert to explore unknown travelers. There are shadows under the sunlight and shadows come from people rather than sunlight.
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