Question 1164

"Fatty, is there any way to distinguish between those doubles and the real person?" Zhao Yanyan interrupted and asked, it would be best if he could tell the difference.

"Temporarily, there is no difference from the surface." Guo Tailai smiled bitterly: "Unless it is DNA testing, but the premise is that there are original DNA samples for comparison."

"On other people's territory, if you make a substitute that can be seen at a glance, can the fat man come back?" Mr. Zhao still understands that the nursing fee for the fat man is not easy to earn: "Even Udai's confidant bodyguards recognize it. If it doesn’t come out, it’s a stand-in, we want to recognize it on the TV news, it’s hard!”

"However, the appearance is exactly the same for the time being, but there are differences in life between them and their substitutes, as well as some differences in temperament. If the research is in-depth, there should be subtle differences." Guo Tailai pointed out: "After a while Over time, there may be slight changes in fat and thin, which requires regular records and careful screening. After all, they are not twins, and there are still differences in natural growth."

"Well, it's also a way." Mr. Zhao nodded. After all, there are still two people, not twins. Even if they are exactly the same now, there will be differences after a period of time, unless Saddam and his son can also discipline themselves to the point where they are always in sync with those doubles. But obviously, is that possible? A stand-in is a stand-in after all, how can it be compared with the real person?

This method can distinguish the difference between several groups of people, but it is still impossible to find the real owner. Which group of people is Saddam himself can only be judged by the frequency of appearances on certain important occasions. If Saddam was smart enough, he would change the composition of the bodyguards around him from time to time, and several different stand-ins would appear in turn, and the difficulty of distinguishing them would increase exponentially.

"By the way, fat man, if it were you, would you be able to recognize it?" Mr. Zhao asked one more question at last.

"If you see it with your own eyes within half a year, it's fine." Guo Tailai said with certainty, "But the clarity on TV is not good, unless there are particularly high-definition photos."

"You made a mark?" Mr. Zhao was overjoyed.

"It's just a distinguishing mark for me." Guo Tailai didn't hide it either: "The length difference between the body double and the few fine lines on the face is 0.1 mm. My eyesight can tell the difference, but ordinary people can't. But it's hard to tell after half a year. , The growth status is different, and the fine lines on the face will always change."

"That's the same as nothing. Even if you take a high-definition photo, the time will pass when you get it back, and I don't know who will appear again." Mr. Zhao nodded, pondered for a while and said: "Then I will Tell the above, you can't recognize it."

Guo Tailai's eyes can directly measure the difference of 0.1 microns. This is what Zhao Yanyan personally measured with a laser rangefinder in the State Key Laboratory of Shuimu University. Therefore, Guo Tailai can distinguish the size difference of 0.1 mm, but others Certainly not. At least Saddam and the others couldn't tell the difference, otherwise they wouldn't have discovered this problem face to face.

"Actually, it's good if you don't recognize it." Mr. Zhao is old and has experienced so many things. He can see farther than Zhao Yanyan. Come to your door to tell you who is strong. Some things should not be messed up too much. It is not good. It is good now. Contribute when it is time to contribute, and withdraw when it is time to withdraw. You are not a person in the officialdom, and you should not worry about things. Use that brain."

"Thank you, Grandpa, for your guidance." Guo Tailai thanked him with a smile.

Mr. Zhao smiled all over his face, and accepted Guo Tailai's thanks without any politeness. Of course, he also understood what Guo Tai came to see him for. This was his grandson-in-law, and he decided whether he would marry or not, so of course he had to help.

"Fatty, is it possible to distinguish this difference technically?" Zhao Yanyan is an engineering student. Now that this topic is mentioned, I can't help but want to go deeper. It is best to solve it technically. Don't worry.

"Yes!" Guo Tailai has never disappointed his senior sister when asked technical questions.

As soon as he answered a word, Zhao Yanyan's eyes lit up, and even Mr. Zhao was pleasantly surprised. Is it technically possible?

"But not yet." Guo Tailai organized his vocabulary and said: "A powerful computer system can make targeted judgments, but the current chips and video recognition algorithms are not technically qualified. For the time being, there are still some difficulties in realizing it.”

"How exactly?" Zhao Yanyan asked excitedly. This has nothing to do with the previous matter, it is purely to satisfy a female Ph.D.'s curiosity about solutions to technical problems.

"In the security system that our company is currently developing, there is a branch called the gait recognition system." Guo Tailai didn't hide his secrets from his senior sister, and quickly explained: "It is by analyzing the normal state of a person's walking body and bones." Each person’s gait is different due to different environments and habits from childhood to adulthood, and it is a unique characteristic of each person, just like fingerprints, iris and voiceprints.”

As long as a concept of this kind of gait recognition is proposed, Zhao Yanyan can immediately figure out the principle, and immediately feel relieved when he hears it.

"The current problem is the current computer performance bottleneck and the optimization of the video recognition algorithm." Guo Tailai went on to introduce: "The company may need to build a supercomputing center in the next step, and use the supercomputing power to continue to improve the algorithm and realize video recognition. Gait recognition, this is also very important to the company's security. But..."

"But what?" Zhao Yanyan asked quickly.

"Even if there is a gait recognition system, it can only distinguish four different groups of people." Guo Tailai said with a wry smile: "It is still impossible to confirm who is the real owner, because we don't have the most original gait data of the real owner, so we don't know who the real owner is." method to match. Unless you can determine who is the person, and then store the correct gait data first, you can recognize it from the walking posture after the next time. In addition, the restrictions are relatively large, and the requirements for video shooting are also very strict. It is necessary to compare the data in several directions at the same time.”

"This gait recognition system can be used in the secret department of the military!" After Zhao Yanyan understands the principle, it is easy to understand Guo Tai's restrictions, but the concept of this security system is used in the secret department. Big killer!

"Of course!" Guo Tailai replied with a smile: "I will recommend it to the military after our company passes the trial."