Text/Tiger Sniff intern Liu Tao
Backstage @candy1983 asked, is there really that sky eye in "Super 7"? How good are we now?
I believe that students who have watched "Fast and Furious 7" have been amazed by the godlike "Sky Eye" system inside. On the one hand, if the system is as powerful as depicted in the movie, then the use of this high technology to catch criminal suspects and terrorists in the future will become "so easy". On the other hand, this pervasive surveillance can also make us worry about our privacy and security.
But after all, this is only the plot depicted in Hollywood blockbusters, what does the realistic version of "Sky Eye" look like? And what level of intelligence can be achieved? In this article, tiger sniffers come to take you for a pickpocket.
Chicago City Hall partnered with IBM to launch a city-wide 7/24 monitoring and identification system.
In fact, as early as 2006, Richard M. Daley, then mayor of Chicago, created a department called OEMC (Office of Emergency Management & Communications) out of consideration for the personal safety of citizens and IBM to develop a new generation of intelligent surveillance systems.
The project has undergone two stages of development and has basically matured, becoming the largest municipal surveillance system in the United States. In the first phase, OEMC and IBM collaborated to install thousands of high-resolution cameras on the streets of the city, most of which have a full range of surveillance angles and can adjust the shooting angle as needed, thereby minimizing the "dead end" of surveillance.
In addition, the government also has the right to use cameras in some schools, hospitals, and buildings, which can be called at any time. At the same time, IBM and its partner companies ensure the stability of the system and faster and more secure data transmission through technical research and development.
In the second phase, the technology companies, led by IBM, developed a large number of analytical tools. Two of the most prominent are face recognition and automatic tracking. Thanks to the new HD cameras, the images they capture can be magnified to six times the usual size without distortion. On this basis, the analysis software identifies and matches by comparing the facial features and proportions of the monitored person. Similarly, the technology could also be used to identify license plates.
As for automatic tracking, the simple principle is as follows. For example, if you're walking down a street, all the cameras on that street will track your tracks. If you step out of the field of view of one camera, then the next one will automatically connect, and so on, and finally record the suspect's full trajectory.
The technology was fully used in a shooting investigation in 2009. A secondary school principal was found shot dead in a car parked under the bridge. Later, in the replay of the automatic tracking video of the deceased, it was found that the deceased had been alone in the car in the last hours of his life, and was finally confirmed by the police as a suicide.
However, dense cameras also mean the loss of citizens' privacy. At this point, the citizens of Chicago are of course aware of this, and are directly connected with the government's lawsuits. It seems that personal privacy and public safety have always been a contradiction.
Persistent surveillance systems that use aerial photography to cover more areas.
Compared with the use of cameras all over the city in the movie to monitor, the persistent surveillance systems company from the United States has an interesting idea: using the small civilian aircraft purchased by the company, as many as a dozen cameras are concentrated on the aircraft, and then around the clock real-time shooting ground information and transmitted back to the monitoring center.
According to mcnutt, the company's founder and former U.S. Air Force pilot, by installing twelve high-resolution wide-angle cameras on second-generation Hawkeye aircraft, each aircraft can cover up to 65 square kilometers of area. And unlike Google Earth's real-time static shooting, this system will record dynamic video and save it and transmit it back to the ground, thus truly achieving the "track playback" function in the movie.
However, mcnutt also admitted that despite the use of high-resolution cameras, their pixel clarity is not enough to show the individual characteristics of the monitored personnel, and the final display on the screen is only a small gray dot. But it's also good enough to track down the whereabouts of criminals.
In 2012, when the system was deployed in Compton, California, the moving images it sent back helped police crack a series of homicides and robberies. The specific principle of use is this: when a crime has occurred, the police first lock the time and place according to the place where the crime occurred and the testimony provided by passers-by. Then, by matching the time and place, the police replayed the footage recorded by the "continuous surveillance system" until the crime occurred, so that the criminals could be traced all the way.
So this leads to the logic of the use of the "continuous monitoring system": first determine the place and time of the crime, and then trace the whereabouts. The system has been deployed to a number of cities with high crime rates in the United States to help the police crack the case.
Although the "Eagle Eye" planted in the air cannot accurately capture the face, founder Mcnutt confidently said, "Compared to the need for countless ground cameras to cover the whole of San Francisco, we can shoot with a few planes, which greatly saves costs."
Speaking of this, Tiger Sniff jun also wants to make up for it, and does not know whether the future of UAV real commercialization will solve the problem of limited coverage area by deploying more UAVs. But when you see the drones circling around, will you get goosebumps?
Access to the home's private camera, nextdoor to create a social surveillance network
A community sharing platform called nextdoor in the United States also has its own ideas for surveillance and tracking. Unlike the movie and Palantir to solve problems with high technology, nextdoor, as a social networking platform that operates a neighborhood as a unit, adopts a social + sharing model to solve problems.
Here's how: NextDoor doesn't produce its own cameras, but works with dropcam, a camera equipment vendor, to provide high-definition cameras for each community's residents with motion recognition. In simple terms, for individuals, when their own home is out, if the camera captures a change in movement, then it will call the mobile phone. This is much the same as the common cameras on the market.
NextDoor wants to do more, though. NextDoor encourages each family to plug their own cameras into social platforms, and then the residents in the community share this monitoring network, of course, this monitoring network is only available to local residents. In the United States, every home generally installs a camera in front of a garage, courtyard, and porch. The area covered by a single home is limited, but all the cameras can be aggregated to form a security surveillance network covering the entire community and the surrounding area, and nextdoor has covered more than 20,000 communities in the United States.
Harnessing the power of social and sharing, nextdoor also provides a new way of thinking for our public safety: "Sky Eye" is not necessarily a cold "black technology", it can also be a "crowd picking firewood flame high" among neighbors.
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