Chinese authorities have begun deploying a new surveillance tool: “gait recognition” software that uses people’s body shapes and how they walk to identify them, even when their faces are hidden from cameras.
Already used by police on the streets of Beijing and Shanghai, “gait recognition” is part of a push across China to develop artificial-intelligence and data-driven surveillance that is raising concern about how far the technology will go.
Huang Yongzhen (黃永禎), the CEO of Watrix, said that its system can identify people from up to 50 meters away, even with their back turned or face covered. This can fill a gap in facial recognition, which needs close-up, high-resolution images of a person’s face to work.
Photo: AP
“You don’t need people’s cooperation for us to be able to recognize their identity,” Huang said in an interview in his Beijing office. “Gait analysis can’t be fooled by simply limping, walking with splayed feet or hunching over, because we’re analyzing all the features of an entire body.”
Watrix announced last month that it had raised 100 million yuan (US$14.5 million) to accelerate the development and sale of its gait recognition technology, according to Chinese media reports.
Chinese police are using facial recognition to identify people in crowds and nab jaywalkers, and are developing an integrated national system of surveillance camera data. Not everyone is comfortable with gait recognition’s use.
Photo: AP
Security officials in China’s far-western province of Xinjiang, a region whose Muslim population is already subject to intense surveillance and control, have expressed interest in the software.
SOCIAL CONTROL
Shi Shusi, a Chinese columnist and commentator, says it’s unsurprising that the technology is catching on in China faster than the rest of the world because of Beijing’s emphasis on social control.
“Using biometric recognition to maintain social stability and manage society is an unstoppable trend,” he said. “It’s great business.”
The technology isn’t new. Scientists in Japan, the UK and the US Defense Information Systems Agency have been researching gait recognition for over a decade, trying different ways to overcome skepticism that people could be recognized by the way they walk.
Professors from Osaka University have worked with Japan’s National Police Agency to use gait recognition software on a pilot basis since 2013.
But few have tried to commercialize gait recognition. Israel-based FST Biometrics shut down earlier this year amid company infighting after encountering technical difficulties with its products, according to former advisory board member Gabriel Tal.
COMPLEX BIOMETRICS
“It’s more complex than other biometrics, computationally,” said Mark Nixon, a leading expert on gait recognition at the University of Southampton in Britain. “It takes bigger computers to do gait because you need a sequence of images rather than a single image.”
Watrix’s software extracts a person’s silhouette from video and analyzes the silhouette’s movement to create a model of the way the person walks. It isn’t capable of identifying people in real-time yet. Users must upload video into the program, which takes about 10 minutes to search through an hour of video. It doesn’t require special cameras — the software can use footage from surveillance cameras to analyze gait.
Huang, a former researcher, said he left academia to co-found Watrix in 2016 after seeing how promising the technology had become. The company was incubated by the Chinese Academy of Sciences. Though the software isn’t as good as facial recognition, Huang said its 94 percent accuracy rate is good enough for commercial use.
He envisions gait recognition being used alongside face-scanning software.
Beyond surveillance, Huang says gait recognition can also be used to spot people in distress such as elderly individuals who have fallen down. Nixon believes that the technology can make life safer and more convenient.
“People still don’t recognize they can be recognized by their gait, whereas everybody knows you can be recognized by your face,” Nixon said. “We believe you are totally unique in the way you walk.”
— Additional reporting by Olivia Zhang
By 1971, heroin and opium use among US troops fighting in Vietnam had reached epidemic proportions, with 42 percent of American servicemen saying they’d tried opioids at least once and around 20 percent claiming some level of addiction, according to the US Department of Defense. Though heroin use by US troops has been little discussed in the context of Taiwan, these and other drugs — produced in part by rogue Chinese Nationalist Party (KMT) armies then in Thailand and Myanmar — also spread to US military bases on the island, where soldiers were often stoned or high. American military policeman
Under pressure, President William Lai (賴清德) has enacted his first cabinet reshuffle. Whether it will be enough to staunch the bleeding remains to be seen. Cabinet members in the Executive Yuan almost always end up as sacrificial lambs, especially those appointed early in a president’s term. When presidents are under pressure, the cabinet is reshuffled. This is not unique to any party or president; this is the custom. This is the case in many democracies, especially parliamentary ones. In Taiwan, constitutionally the president presides over the heads of the five branches of government, each of which is confusingly translated as “president”
An attempt to promote friendship between Japan and countries in Africa has transformed into a xenophobic row about migration after inaccurate media reports suggested the scheme would lead to a “flood of immigrants.” The controversy erupted after the Japan International Cooperation Agency, or JICA, said this month it had designated four Japanese cities as “Africa hometowns” for partner countries in Africa: Mozambique, Nigeria, Ghana and Tanzania. The program, announced at the end of an international conference on African development in Yokohama, will involve personnel exchanges and events to foster closer ties between the four regional Japanese cities — Imabari, Kisarazu, Sanjo and
Sept. 1 to Sept. 7 In 1899, Kozaburo Hirai became the first documented Japanese to wed a Taiwanese under colonial rule. The soldier was partly motivated by the government’s policy of assimilating the Taiwanese population through intermarriage. While his friends and family disapproved and even mocked him, the marriage endured. By 1930, when his story appeared in Tales of Virtuous Deeds in Taiwan, Hirai had settled in his wife’s rural Changhua hometown, farming the land and integrating into local society. Similarly, Aiko Fujii, who married into the prominent Wufeng Lin Family (霧峰林家) in 1927, quickly learned Hoklo (commonly known as Taiwanese) and
RSS