While the ability of a computer to look at a person’s face and compare it to one in a database is fairly commonwww.cechina.cn, current technology can go much farther. A system can now look at an individual and make some conclusions about that personCONTROL ENGINEERING China版权所有, and even his or her state of mind.
　　Omron has developed a group of facial recognition products under the name Okao Vision, borrowing the Japanese word for “face.” Omron began by simply finding faces in an image, but that was only a start. “From there it got more complicated,” says Sarah Hallwww.cechina.cn, corporate communications for Omron. “We have found ways to determine gender and age in the last couple of years.”
　　One recent development is the Smile Scan capability. This new system can watch individuals and see if they’re smiling. If you run a fast-food restaurantCONTROL ENGINEERING China版权所有, you can make sure your servers look pleasant. While that may seem almost trivial, it is a valuable training tool, and represents some remarkable engineering.

　　Creating the 3D mask is a three step process.  After initially blocking out the shape, the software tightens the frame until it can make very detailed analysis of critical features.
　　Hall explains: “Facial recognition technology is based on a 3-D mask that is fitted over an image of a face. It’s looking at wrinkles and movement around the lips and eyes, so it operates differently than most machine vision applications. The fundamentals are the same in that it’s looking at shapes and colors, but in terms of the actual process, we’re using a different approach."
　　Does it work? Devices tested in Japan to judge the age of tobacco or alcohol buyers were generally as good or better than human observers. Still, determining if the subject is 17 or 22 years old is easier than spotting the difference between 53 and 58.
　　The computer is able to determine if a subject is happy, distracted, sleepyCONTROL ENGINEERING China版权所有, or in pain. “We’re trying to expand the range of emotions that it’s able to analyze, but it’s quite difficult,” Hall adds. “You could