Xueba's computing system

Chapter 63 Unintentional intervention
After Gu Xuan left, Lin Yuan was a little at a loss, because he could clearly see that Professor Zhang was suppressing his anger.

"You must be curious."

Lin Yuan was of course curious about what happened here, "Teacher, what happened?"

"Gu Xuan suddenly came to me today to ask for a project. Normally, he is in his first year of graduate school this year, and according to convention, he would not be given a project." Professor Zhang looked a little tired, "But considering that he graduated from Zijin University and graduated from the Department of Mathematics, I am happy to see him make progress.

But the topic he wanted was not the one I had. "

"It's not in your hand, why?" Lin Yuan was a little confused.

"Because the topics I'm working on are all oriented towards engineering applications, and involve a lot of collaboration with companies. The topic he wanted was '3D structured light for faces', which is relatively new and would be convenient for him to use to publish a paper."

"3D structured light for faces? What is this for? I've only heard of facial recognition."

"You can think of it as an advanced version of facial recognition. Currently, facial recognition on the market is based on 2D plane data, but our face is obviously a 3D thing. So 3D structured light is essentially building a 3D model for the face, and its recognition accuracy will definitely be much higher."

Lin Yuan felt that he was somewhat ignorant. "Gu Xuan is indeed a graduate of Zijin University. He started studying such profound things right away. I'm still working on takeout."

"You don't have to underestimate yourself. The 3D structured light of the face does require a higher level of mathematical knowledge and requires a lot of modeling and calculation. But mathematics is a tool after all, and people don't do things around tools. Not everyone wants to win the Fields Medal."

"Is the teacher not very supportive of him?"

"Of course I don't support it. Haven't you figured it out? He's aiming to publish papers. There are so many things he can learn at such a young age, but he has learned all the tricks of an academic hooligan without any guidance." Professor Zhang looked distressed.

"At first I thought he was reluctant to give up his advantage in mathematics, and I spent a lot of time persuading him. You can't just do whatever you know at the moment when studying for a master's degree. You have to have a long-term plan.

Humph~~, you saw it later too.

At the end of the conversation, I found out that I was just being overzealous, and what they wanted was to publish an SCI paper as soon as possible.”

SCI? It was so unfamiliar to Lin Yuan. He almost forgot that all top students seemed to publish in SCI?

"Teacher, isn't the SCI paper impressive?"

“What’s impressive is the paper itself, not the SCI.

"Look at the students nowadays," Professor Zhang couldn't help but point to the door, "the school hasn't even started yet, and they've already started thinking this way. Why do you publish papers? Isn't it to iterate technology and engineering applications? What's the purpose of iterating technology? Isn't it to promote productivity? But the current academic style... Hey, how can publishing papers be regarded as the purpose?

If I had known he was like this, I wouldn’t have wanted to take him in.”

Lin Yuan was originally worried that if Gu Xuan, this chameleon, was favored by his teacher, he would gossip and disgust him. Now it seems that he has exposed himself in advance. This also put an end to his worries.

Lin Yuan doesn't like to kick someone when he's down, even if he doesn't like Gu Xuan. "Face 3D structured light, even if it's for publishing a paper, it can help improve the accuracy of face recognition."

"Hey, why do I say he published a paper just for the sake of publishing a paper? It's because the 3D structured light of this person's face is just a story. This is a routine that academic hooligans often use."

When it comes to this topic, Lin Yuan becomes interested. He moves a stool and sits opposite the teacher's desk, just like a primary school student listening to a teacher's lecture. "You can't say that 3D structured light for faces is useless, but it's not practical at all. Any recognition requires a certain error tolerance rate. Once the error tolerance rate reaches a certain level, it is meaningless to raise it too much."

林远一下子就明白了，“我懂了。老师的意思是说，把99纯度的黄金弄成3个9和4个9的意义其实并不大。”

"Hey," Professor Zhang's eyes lit up, "Your summary is always so on point." Professor Zhang naturally thought of the "North American Jungle Route" that Lin Yuan summarized last time.

"The excessive purification of gold jewelry is purely a marketing gimmick. I hate it when technology is treated like marketing. Tell me, how meaningful is the ultimate recognition accuracy of 3D structured light face recognition?"

Lin Yuan thought for a moment, "It's just like purifying single crystal silicon. First of all, there must be a demand for it, and then there is a need for purification. If we don't purify the silicon wafer to a high purity, we can't use it to etch chips. But for face recognition, if we really need a very high recognition accuracy, then why do we need face recognition? Why not send someone to keep an eye on it?"

Professor Zhang slammed the table and said, "That's right. Every technology has its applicable scenarios. If you make facial recognition so complicated, why don't I send someone to guard it? No matter how strong the 3D structured light of the face is, it can't be stronger than X-rays. It still builds a 3D face model based on light reflection technology. If you encounter a spy wearing a hood, you are helpless."

When Lin Yuan heard the word "spy", he didn't know why he felt sensitive.

Lin Yuan took over the conversation, "And I see that the facial payment that is now popular is obviously based on the conventional facial recognition algorithm of the binocular camera, and at most it adds IR infrared liveness recognition. A company as big as Alipay would not be so stupid as to make such a mistake. I think their model should have taken the risk factor into consideration, and then relied on mobile phone positioning and quotas to achieve effective risk control."

The limit is easy to understand. As long as a maximum limit is added to facial payment, even if an error occurs, as long as the probability of error is not too outrageous, the overall loss will be small. Because potential loss = probability x limit. By suppressing the limit, the maximum value of potential loss can be controlled.

What if users want to break the limit? They won’t be happy to pay tens of thousands of yuan by face recognition. Face recognition payment is not suitable for large-amount payment scenarios. So why pursue extremely high accuracy?

Lin Yuan continued, "The equipment that supports 3D structured light for faces shouldn't be cheap."

"Of course." Professor Zhang replied unhappily.

"I think so too. The business behavior of commercial companies is the most honest. Otherwise, payment platforms would have adopted this system long ago."

"You are more down-to-earth. I didn't misjudge you."

Lin Yuan was a little surprised by the sudden praise from his instructor. It seemed that he had done nothing, but he had defeated Gu Xuan in front of his instructor. Could this be the legendary "God helps those who help themselves"?
"They took the scientific research funds, and in the name of research, the research was not simple, and people couldn't say anything..."

While Professor Zhang was still complaining, Lin Yuan had already gotten used to his mentor's old-fashioned demeanor.

He actually understands his mentor very well. Because there is no set standard for market acceptance, you can't stop people from researching this thing on the grounds that it doesn't meet market demand.

"Don't learn from him." Professor Zhang said at the end.

"I know. I will never learn from him."

To put it bluntly, Gu Xuan was eager to tackle a somewhat complicated topic that was easy to write a paper on but had no application prospects before he even entered the university. This caused Professor Zhang's disgust.

"By the way, let's talk about your business."

"Okay. Teacher, I got it done."

(End of this chapter)