① Maybe you have seen that the technology fans around you have magical "special functions": if you move your eyes, the screen will turn pages; if you blink, your mobile phone can take pictures; if you are sleepy while driving, your eyelids will droop. , a voice prompt will sound immediately... This is not because their eyes have been modified, but because the equipment they use is equipped with a technology called "eye tracking".
②The principle of eye tracking technology is not complicated: when a person's eyes look in different directions, there will be subtle changes in the eyes. These changes will produce features that can be extracted, and the computer can capture or Scan and extract these features to track eye changes in real time, predict the user's status and needs, and respond to achieve the purpose of controlling the device with your eyes.
③The main equipment used at this stage includes infrared equipment and image acquisition equipment. In terms of accuracy, the infrared projection method has a relatively large advantage. It can be accurate to within 1 centimeter on a 30-inch screen. Supplemented by technologies such as blink recognition and gaze recognition, it can already replace the mouse and touchpad to a certain extent. Some limited operations. In addition, other image acquisition devices, such as cameras on computers or mobile phones, can also achieve eye tracking with the support of software, but they vary in accuracy, speed and stability.
④In daily life, the most popular carrier of eye tracking technology is mobile phones. For example, Samsung's previous generation flagship Galaxy S3 can control the lock screen time by detecting the user's eye state. As long as it detects that the user is staring at the phone screen, the screen will not turn off even if the user does not perform any operations. The release of Galaxy S4 further extends this function: you can control the page to scroll up and down through your eyeballs.
⑤Is there any way to enable eye tracking on old devices? Tobii, a Swedish company, plans to launch a product this year that will allow older computers to access the new technology. This device is called Rex. It is a computer peripheral device. As long as it is placed at the top of the screen and connected through the USB interface, users can use their sight to control the computer to complete some operations, such as controlling IE page scrolling and using Windows 8 maps. Applications etc.
⑥In addition to computers and mobile phones, cars are also likely to be the first place where you come into contact with eye tracking technology. Both General Motors and Toyota have made considerable investments in this area. It can simulate the driver's field of vision in real time and remind the driver of possible dangers in the blind area; when the driver's eyelids droop (drowsiness) or the number of blinks decreases (mind wandering), etc., it will also issue a sound reminder. An Australian company called Seeing Machines has recently developed a similar product. As long as the driver closes his eyes for more than 1.6 seconds, the alarm will sound and the seat will vibrate.
⑦ There are still many difficulties in the development of eye tracking technology. For example, it is not easy for a machine to effectively identify the true intention of human eye movements to determine whether it is an unconscious movement or a conscious change. Therefore, it is difficult for this technology to become the main way of interaction between humans and machines in the short term. However, it is a good supplement to more mature human-computer interactions such as mouse, keyboard and touch, and has many applications in medical health, online education, and psychological research. It has broad application prospects even in the field of criminal investigation.
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15. The object of this article is eye tracking technology. What aspects does the author focus on to explain it? (4 points)
16. Which explanation method is mainly used in paragraph 4 of the article? What does it do? (3 points)
17 How does the underlined sentence with the word "possibly" reflect the characteristics of the language? (2 points)
(3) Expository reading (9 points)
15. ① The principle of eye tracking technology ② The main equipment used at this stage ③ The carrier of eye tracking technology ( or application) ④ Current difficulties and application prospects in the development of eye tracking technology (1 point per point, ***4 points)
16. Give an example (1 point).
Specify that the most popular carrier of eye tracking technology is mobile phones (2 points). ***3 points.
17. “Maybe” indicates an estimate and serves as a limitation, indicating that apart from computers and mobile phones, cars are the first place you come into contact with eye-tracking technology. This is just a speculation. If it is removed, the language will be too absolute. It is inconsistent with the original intention and reflects the accuracy and rigor of the expository language. (2 points)