1995, Starting as a Criminal Investigation Expert

"Are you studying computer science?"

Liu Weikun looked Li Shu up and down.

If you're studying computer science, it's normal to know a little about AFIS systems.

Li Shu shook his head, saying that he studied criminal technology.

Liu Weikun was taken aback, thinking to himself that something was wrong.

These days, computers are a rarity; some people have never even seen one and have no idea what it is.

Why would Li Shu, a criminal science and technology expert, understand computers?

"By the way, which school did you graduate from?"

Liu Weikun suddenly realized that Li Shu might have known about the AFIS system because the police academy had it during his university years.

In China, institutions like the Public Security University and the Criminal Police Academy have this system for conducting related research.

Li Shu has nothing to be ashamed of when mentioning his alma mater; on the contrary, he is very proud of it.

But Liu Weikun was taken aback when he heard this, and asked in surprise, "Isn't this a vocational college?"

The main problem is that Ningjiang Police Academy doesn't have an AFIS system either.

Where did Li Shu learn all this from?

Li Shu was taken aback; he didn't even think much of vocational colleges anymore.

Which school did you graduate from?

Li Shu retorted.

Liu Weikun gave him a knowing look and replied matter-of-factly, "Peking University."

This domestically developed AFIS system was spearheaded by Academician Shi from Peking University.

Li Shu clenched his fists, completely at a loss for words, so he simply said that he was self-taught.

"ha!"

Upon hearing this, Liu Weikun chuckled instinctively, as if he had heard the biggest joke in the world, and then fell silent.

Li Shu got a little anxious and argued, "I really do understand."

Li Shuzhen carefully read the information on the system and worked hard to learn it.

If you're asking me to write some code, that probably won't work.

But I truly understood the specific principles behind it.

"Okay, you get it."

Liu Weikun gave a casual reply.

He guessed that Li Shu had probably read some journals or related materials and had only a superficial understanding of this matter.

After another string of nonsense, he fooled Han Jianjun and the others who knew absolutely nothing about it, making them think that Li Shu understood this stuff.

He left Li Shu aside and focused on unpacking the box.

It was packed very well, filled with shock-absorbing foam.

After carefully examining the host in front of him and confirming that it was undamaged, he introduced it to Li Shu.

Whether Li Shu understands or not is not important.

His purpose in coming here is to teach the people in Nanjiang how to use this equipment.

"Look, this is a..." Liu Weikun pointed to the main unit and introduced it.

Before he could finish speaking, Li Shu interrupted, "SGI's graphics workstation."

Liu Weikun paused for a moment, then nodded: "That's right, this is a graphics workstation, or rather, a computing power computer, which is the core of fingerprint comparison..."

He suddenly stopped and didn't continue.

Li Shu probably doesn't understand things like computing power.

As long as you know what to do, that's fine.

As for Li Shuneng mentioning SGI?

Liu Weikun glanced at the SGI logo on the host and understood.

Li Shu watched silently.

The system contains some information that uses introductory language to explain the development of the domestically produced CAFIS system.

It was mentioned that the systems initially put into production in the 1990s used SGI's INDIGO R4000 graphics workstations.

These are all imported goods, five in total, and they're not cheap.

No wonder Liu Weikun cherished it so much, even worrying that the train's resonance would damage the machine.

There are more than just these five main units.

These five provide the core computing power, and there are several more microcomputers responsible for graphics processing and dedicated human-computer interaction.

"This is……"

Liu Weikun dismantled a wooden crate, pointed to one of the devices, and was about to introduce it when Li Shu interrupted him again.

"Optical data acquisition device."

It wasn't that Li Shu was intentionally showing off, but Liu Weikun's tone was really infuriating.

Moreover, if you don't prove you understand these things, how can you cooperate in the future?

The software aspect still needs Liu Weikun and his team to adjust.

Liu Weikun paused for a moment, put down his phone, and pointed to another device.

"Scanner".

Li Shu immediately identified the brand, even mentioning the name of the sign, because it resembled a picture from the system's data.

Liu Weikun perked up and pointed to two more devices. Li Shu could even recognize the hardware acceleration board used to improve image processing efficiency.

"No, you really know that?"

Liu Weikun looked completely surprised.

Li Shudao said, "I told you, I really understand it, and I even know how it works."

Upon hearing this, Liu Weikun quickly said, "Okay, then tell me, how does it work?"

Li Shu didn't waste any words and started speaking directly.

Liu Weikun originally thought that Li Shu would talk about the most basic principles, such as collecting fingerprints here and then comparing them with a computer.

For him, this isn't called a working principle, it's called a workflow.

But that's all many people know.

How the specific system compares the data involves the core algorithms, which requires at least some programming knowledge.

Unexpectedly, these were exactly the things Li Shu was talking about.

Liu Weikun was particularly surprised when Li Shu explained how the system establishes a coordinate system and then compares and finds matching feature points through stretching and other means.

Li Shu's words hit the nail on the head, revealing the system's core working principle.

"You really know your stuff!"

Liu Weikun was speechless for a moment, and his face changed.

He felt a surge of disbelief.

How can someone who isn't a computer science major, but rather a college graduate, know all this? They claim to be self-taught, but how come they don't know which journal has articles about these things?

Liu Weikun snapped out of his daze and hurriedly asked Li Shu where he had found out.

Li Shu glanced at Han Jianjun and the others.

"We've been waiting for this," he said, "Engineer Liu, let's stop with the small talk."

Actually, whether he understands or not, Li Shu doesn't need Liu Weikun's approval. He's currently handling a case, and the other side is so anxious they're practically burning down their house.

"Mr. Liu, let's hurry up and assemble it, then start scanning the fingerprints."

Sixteen thousand fingerprint cards, who knows how long it will take to scan them.

Liu Weikun was stunned for a moment, somewhat taken aback.

It's quite unbelievable that in a small place like Nanjiang, or at least in his mind, people have already connected with cutting-edge international technology and have such a deep understanding of the AFIS system.

He said no more and began to unpack and assemble the items.

As they were disassembling the machine, and the two workers started assembling it, Liu Weikun suddenly turned around and asked, "Hey, what did you mean by that 'partitioning method' you mentioned earlier?"

Li Shuxin thought to herself, "Didn't you say that this is science, and if it doesn't work, it doesn't work? Why are you asking this question now?"

Liu Weikun himself was also embarrassed, and said with an awkward smile, "I just wanted to know what it meant."

Cao Junfei has been in Anjing for several days, learning about the system.

Suddenly they wanted to buy it, and even said they needed to compare some kind of incomplete fingerprint.

The car had just mentioned some kind of zoning method, and Liu Weikun couldn't help but wonder if there was some special method in Nanjiang that allowed them to use the AFIS system to compare incomplete fingerprints.

After all, there's someone here who knows a lot about this.

And if that's the case, then it's going to be terrible.

Although an important goal during the development of the AFIS system was to compare blurry or incomplete fingerprints, that was just a goal.

Currently, whether domestically produced or imported, dealing with damaged fingerprints remains a major challenge.

Li Shu wanted to take this opportunity to have a proper talk with Liu Weikun.

The system provided this method, saying it would work, and Li Shu himself felt it was fine too.

Whether it will actually work or not still needs to be judged by experts like Liu Weikun.

Li Shu explained the whole process of the partition comparison method, which is fingerprint partitioning, manual screening of clear areas, manual addition and deletion, and marking of feature points, to Liu Weikun.

Liu Weikun did not interrupt Li Shu and listened patiently to the end.

After hearing it, he instinctively wanted to open his mouth and retort that it was like taking off your pants to fart.

But the words caught in his throat.

Upon closer reflection, I realized that Li Shu's method was not as simple as taking off one's pants to fart.

Moreover, the more you think about it, the more something seems wrong.

"Holy crap."

Liu Weikun suddenly hugged his arm, momentarily confused.