According to the South China Morning Post, researchers in China are working on producing a device to scan crowds and identify potential terrorist suspects.
In response, besides muscle, the government has been employing increasingly high-tech ways of keeping a reign on things. The latest gadget to ensure “harmony” in the Mainland could be the anti-terrorist version of Google Glass, suicide bomber-detecting glasses.
The concept is that a mini-camera will scan crowds and be able to recognize signs of individuals under stress. The method involves capturing light that travels at wavelengths that the human eye is not sensitive to, hyperspectral imaging. Using this imaging, it is possible to see how much oxygen is in the blood, specifically in the face. A shortage of oxygen, low blood oxygenation, indicates stress.
The idea is that someone about to instigate a terrorist act is under a great deal of stress. Being China, the same could be said for someone about to instigate an act of free speech. Both groups (terrorists and free-thinkers) are on government watchlists.