He said to himself: "This shopkeeper is really picky, and he is reluctant to hang an electric light outside." No wonder he focused his camera on www.biquge.info the outside of the entrance, originally wanting to use the light of the street lamp. ”

At first, the image is empty, but after a few seconds, a figure begins to appear on the road on the left side of the frame, first a man in a black leather jacket and jeans, then a man in a down jacket, then a man in a suit and a dark down jacket......

They walk from the road on the left side of the camera and walk into the frame, and then walk out of the road on the right side of the camera.

Because the length of the road that the camera can shoot is only about 10 meters, the four men who appear in the frame only have about 10 seconds to walk in the footage.

I don't know if the other party knew that there was a camera in front of the store, or because of a coincidence, they didn't turn their heads to look at the store, but kept keeping their sides and walked from the left and then walked out to the right without hurrying.

It was only when a van came from the right that the four men changed their form, and the man in the black leather jacket in front of him inadvertently moved to the right side of the road, unconsciously looking up at the car coming from in front of him.

The picture is indeed very blurry, staring at the video to see the general outline of the side faces of these people, if it is not for people who are familiar with them, they can't recognize them at all, only know that they are men, in their twenties or thirties, it should not be more than forty.

It's no wonder that Huang Zibin and they have nothing to do with this video, not to mention that the police can't be sure whether they are murderers or not, and they can't conduct a large-scale search for them.

The faces are blurred and there is no large-scale search, and it is naturally more difficult for the police to find them than to find a needle in a haystack.

Meng Wentian watched this video of about ten seconds carefully, and he couldn't see anything famous the first time, but after watching it twice, he found that these four men were indeed a little abnormal, and thought that the police suspected them for reason, because these four men walked too normally!

It was precisely because they behaved too normally that Meng Wentian found out that something was wrong:

Ordinary people walk in the cold night either because they are fast, reach their destination early and warm up early, or they talk and laugh on the road, forgetting the cold and forgetting the time because they are happy. But they are so calm, silent, not hurried and not slow, unless they are soldiers on a mission, ordinary people will definitely not do this. They are not soldiers, so they are naturally bad people, and they have done something bad for fear of attracting the attention of others, so they deliberately walk so calmly.

However, Meng Wentian's job today is not to suspect whether these people are murderers, but to analyze their physical characteristics.

He immediately ran their newly developed "Intelligent Human Identification System" software on a server with extremely fast computing speed, analyzing the relevant physical characteristics of the suspected object.

He clicked on the man in the black leather jacket at the front of the video with the mouse, first named him "The Man in the Black Jacket", and then asked the "Human Intelligence Recognition System" to start the feature analysis.

With the help of a powerful server, in just a few seconds, the human body intelligent identification system has completed the analysis of the body surface characteristics of the man in the black jacket, and the analysis results are saved in the "Screening Parameter Folder", the file name is "The Man in the Black Jacket".

The reason why the speed is so fast, in addition to the powerful functions of the server, in fact, there is also the "man in the black jacket" who has been facing the camera sideways, and the time is only ten seconds, and the system cannot analyze his positive features and left side features, but can only analyze his right side face, walking posture, height, the proportion of each part of the right limb, etc.

Meng Wentian immediately analyzed the second man and named it "Man in a light-colored down jacket". Soon, there was an additional data file named "Man in a Light Down Jacket" in the "Screening Parameters Folder".

Next is the analysis of the two men, the man in the suit and the man in the dark down jacket.

After completing this, Meng Wentian's remaining work was to look around for the four men in the data file.

How to find it?

It's easy to say, it's nothing more than looking for the camera in the area where the murderer may go, and then getting the video from the background of the camera and using the "human intelligent identification system" to analyze and compare, and trying to find the same or similar characteristics of the human body images in the video as those in the screening parameter file, and then looking for clues left by the murderer through these videos.

It's hard to say, but it's hard to know where the killers are and where more videos of their whereabouts have been filmed.

Those guys are the most vicious people, and they know that they have committed a capital crime, and they must be trying to hide their whereabouts so that you can't find them at all, unless you analyze all the tapes and videos in the city.

Do you know that Huhai City is an international metropolis, with a population of nearly 20 million, and there are hundreds of thousands of places with cameras, so how many people and how much time do you have to send to carry out intelligent identification and analysis?

Of course, the current Meng Wentian will not think about it so much, after he obtained the screening parameter files of the four suspects from the "Human Intelligent Identification System", he began to use the video transmitted by Zhao Wenwen to find it in this video itself to see if they had appeared in this small store in other time periods.

Although Meng Wentian is not a policeman, and he has not done what a policeman has done, after all, he has watched TV, movies, and novels, and knows that many times the murderer will step on the spot in advance before committing a crime, and even if the wandering criminal makes a move, he will look at the surrounding situation to see if it is suitable to start.

Some murderers will even sneak back to the scene quietly after committing the crime to see the effect of their crime, or touch the bottom of the police, and some even perverts will deliberately come over to watch the excitement and appreciate their masterpieces.

Meng Wentian selected the function of "Find Similar Objects" in the menu of "Human Intelligent Recognition System", and then selected the data file "Man in Black Jacket" in the "Screening Parameter Folder" according to the guidance of the program, and then let the system run.

The purpose of this operation is to see if anyone fits the characteristics of the "man in the black jacket" from this large video. If someone fits the characteristics of the "man in the black jacket", it is possible that the "man in the black jacket" has been to the store at another time.

With the help of a powerful server, the "Human Intelligent Identification System" only took about ten minutes to search the video sent by Zhao Wenwen from beginning to end, and did not find a person with a similarity of more than 50%.

The similarity of 50% is the warning value artificially set by Meng Wentian, which means that if someone in the video is 50% similar to the specified object, the system will alarm and remind Meng Wentian to pay attention.

This data can be adjusted.

Seeing that there was no alarm, Meng Wentian reduced the alarm value to 25 percent.

After running, there are still no matching objects.

Meng Wentian re-selected "man in light down jacket" in the "Screening Parameter Folder" to search, but the result was still none.

He was a little disappointed, and said to himself: "Did this group of murderers really not step on the point, or did they deliberately avoid this small store? Or is my software not available at all?"

Disappointment to disappointment, but he didn't stop, and then chose the data of a third object, the "man in the suit", to look up. The system had just been running for a minute when the rapidly scrolling video feed on the screen suddenly stopped!

Meng Wentian was stunned for a moment, his eyes immediately widened, staring at the screen, and said in his heart: Is there a play?

Sure enough, there was a static image on the screen: several customers were walking towards the small shop, all of them looking natural, like people entering the store to buy goods.

Soon a red police box popped up on the screen, framing a picture of one of the customers entering the store.

Looking at the burly man in the red box, Meng Wentian couldn't help but be stunned: "The parameter I just entered is a man in a suit, but why is this man in a black jacket in the box?"

When he looked strangely at the prompt text at the bottom of the screen, his heart was more joyful, because the prompt bar read: "Note: The image of the person in the frame is 90.12% similar to the target (man in suit)!"

Meng Wentian is familiar with the functions of the software of "Human Intelligent Identification System", and naturally understands what this 90.12% means: it means that the person in the picture is very close to the man in the suit he selected, unless this guy and the man in the suit are twins who are difficult to identify even their parents, otherwise, they are the same person!

Wearing a suit or a black jacket does not affect this conclusion at all, because the clothes of the target object can be changed in the preparation of the program, which is explained in technical terms: the change of clothes occupies a very small weight in the similarity judgment index.

After all, people change their clothes a lot.

Although when extracting the appearance features of the "man in suit" at that time, the main extraction was the side features of the "man in the suit", because this guy and his three accomplices did not look at the camera, and the camera took pictures on their right, but the side can also determine whether a person is the same person. Because different people have many different parameters, you don't have to find the person's scars, moles, or anything at all.

For example, the contour of the right side of the head, such as the pinna of the right ear, such as the ratio of the distance from the ear to the cheek to the length of the ear, such as the angle between the back of the head and the neck, the ratio of the length of the right arm to the torso, the angle formed by the thigh and calf at the knee when walking, and the length and frequency of walking...... , etc., these parameters are different from each person, and they are even more different when combined, so many parameters often only need to extract the middle few parameters for combination to judge whether it is the same person.

Some people may wonder if this judgment is hasty, but in fact everyone knows the fact that a person's fingerprint (or pupil) can immediately determine whether it is the same person, and there is no need for the second parameter at all. Even if one person lacks arms and legs, and the other person has all four limbs, as long as the fingerprints are the same, it can be considered the same person.