Military Technology

It was dawn, and after a night of drizzling rain, the streets had been washed clean. A group of security department agents and police officers in police uniforms and plain clothes searched carefully on this small street.

Xu Hui, who hadn't slept all night, had bloodshot eyes in his eyes. At this moment, he was leaning against the side of the car, looking at these busy people, he didn't know where his thoughts went.

"Captain Xu, let's have some breakfast. I bought hot buns and soy milk just out of the pan." A young female detective came over with a bag and greeted him.

"Okay, thank you, I'm really a little hungry." Xu Hui, whose thoughts were interrupted, took the steamed stuffed bun soymilk handed over by the female detective and said with a smile: "Hurry up and deliver it to the big guys, so everyone can eat it too." They all padded their stomachs."

"Captain Xu, did you find anything?" A young detective walked over quickly with a physical evidence bag: "Just now the cleaner found a fruit phone in a trash can not far away. The phone is intact, but it is turned off. Status. The phone number has been verified. This is the phone that Chen Mingcheng lost after talking with 'Viper'.

The cleaner saw that we were looking for something, so he handed us the mobile phone. "

Xu Hui looked at the old fruit phone in the evidence bag, and asked involuntarily, "Have you taken your fingerprints yet?"

"It was collected, but there is nothing on it except the cleaner's fingerprints, and it was wiped clean." The detective said helplessly.

Xu Hui nodded and said: "It's Chen Mingcheng's method, hand it over to the technical department to crack it, and I want to know the contents in the shortest possible time.

In addition, collect the surveillance video of the vicinity for me. From the interrogation of the enemy spy code-named 'Viper', it is known that his last call was to Chen Mingcheng.

In other words, Chen Mingcheng has been directing the entire operation remotely from here. If this is the case, then we can definitely find clues from these monitoring.

In addition to these monitoring on the street, you also need to mobilize the entrances of some shopping malls, as well as 24-hour convenience stores, movie theaters, cafes, fast food restaurants, etc. It was still raining that night, so it was impossible for him to stay on the street. He should have settled in a nearby store.

Although several years have passed, Chen Mingcheng's appearance has changed, but his walking posture, body proportions, and skull cannot be changed. I can use these new types of data to compare the people in the surveillance, and that one is Chen Mingcheng. No matter how powerful you are, you can't escape my hot eyes. "

Everyone has their own special characteristics or imprints, such as fingerprints, irises, lip lines and so on. In fact, there are still many physiological characteristics or biological ID cards that can represent our personal identity characteristics? For example, facial recognition that we often use.

Facial recognition is generally divided into two types: 2D plane and 3D three-dimensional facial recognition. First of all, the first 2D plane is the image recognition technology used? Compare the captured facial image with the original stored facial photo? The coincidence degree meets the standard extremely approved.

However, this method has a big disadvantage, that is, it is impossible to identify which ones are real people and which ones are photos, maybe with a single photo? This 2D facial recognition technology can be fooled.

And what about 3D stereoscopic facial recognition technology? It records the 3D contour data information of the human face, and then compares it with the stored 3D facial contour data. .

But this kind of 3D facial recognition also has flaws, that is, if someone holds the person's 3D face mask? Or a 3D head model? It can fool the 3D facial recognition system and pass the verification.

Therefore, many 3D stereoscopic facial recognition technologies now add infrared sensing and eyeball capture technologies to them. When performing 3D facial recognition, the system will also sense the temperature of the face being recognized and the rotation of the eyeballs at the same time to verify whether it is a real person, not a mask. Only after these conditions are met at the same time can the verification be passed.

Everyone's face is our best biological identity proof, it is unique. But after some cosmetic surgery? Being able to replicate those faces again. But no matter how you copy it, it's only on the surface? It's hard to change the outline of the skull structure.

So we see in many film and television dramas and programs that the police forensic doctor can pass through the skull of the victim and then restore it to obtain the photos of the victim before his death.

And the current artificial intelligence system can calculate and generate the 3D skull outline data based on the photos of the suspects, and then use them as a basis to compare the faces of these people in the huge surveillance images. Features, and the 3D skull outline data generated by it, are then compared to find out the relevant suspects.

In this way, no matter how disguised the suspect is, it will be difficult for him to escape the eyes of the system.

Of course, single-condition screening is prone to errors, and the accuracy rate is limited. This requires adding some search conditions to the artificial intelligence system.

Just like we search for information in a search engine, the more conditions are given, the more accurate the search will be.

Although each of us is walking in the same way, there are subtle differences in walking postures. This is a habit formed subtly, and it is difficult for us to notice.

As for the artificial intelligence system, it can detect these subtle changes and identify the person.

In addition to walking posture, there are also human body proportions.

In terms of fine arts, the proportion of the human body is divided into standing, seven, sitting, five, three and a half, three courts and five eyes. In other words, the body proportion of a normal Asian is seven heads, which is relatively standard.

And some painters will exaggerate this proportion appropriately in order to reflect the figure of a person. For example, when drawing a model, it is usually expanded to nine heads, so that the model drawn in this way is extraordinarily tall and moving.

In real life, in fact, everyone's body proportions are different. Some people are fatter, some are thinner, some have longer legs, and some have rounder heads.

It may be difficult to screen such conditions alone, but when combined, it is also a very valuable clue condition. Combined with the other conditions above, the identity of the suspect can be basically locked.

This is the convenience and assistance that artificial intelligence technology brings to the detection of modern cases, and our country's application of artificial intelligence technology has always been at the world's advanced level.

"With so many surveillance images, it may take a lot of time to collect and compare them. Will there be time? Seeing that the mission failed, Chen Mingcheng probably ran away long ago." The young agent frowned worriedly.

No, Xu Hui shook his head very firmly and said: "Currently, the stations, airports and major imports and exits in downtown Anxi have set up card checks for personnel identity verification. He dare not take the risk to go out of the city because of his identity

I dare to conclude that he should still be in the city now, and he is already trying to hide his identity. "

"How to hide, or continue to disguise as a woman?" The young detective laughed.

"Hehehe, maybe there is a possibility. But no matter how much he hides this time, I will arrest him and bring him to justice." Xu Hui smiled, and then said with firm eyes.