"Looking for abducted children? This is such a hard job!" Lu Weiwei gasped, loudly... the entire cafeteria could hear it.
Gao Xu scratched his head in embarrassment...
Seeing the strange looks from the people around me, I was still a little embarrassed.
He is not an expressive person, and the same is true for his partner Liao Kai, so the two of them will not look boring when they work together.
Moreover, they were handling the case in a different place, so the two of them spoke very quietly.
However, as a policewoman, Lu Weiwei has a louder voice than the two of them.
From the beginning of the conversation, Gao Xu and Liao Kai felt the "enthusiasm" of the Jiangnan City police.
"Haha, yes, this time we have seven working groups, with a total of more than 20 people, sent to different cities to find the whereabouts of the abducted children."
Gao Xu took a sip of the drink Gu Chen bought and continued: "Our group came to Jiangnan City specifically to find a little girl who was abducted ten years ago."
"Ten years ago?" Gu Chen was also stunned for a moment, feeling that things were not that simple.
Officer Wang also said: "Everything has changed ten years ago. Isn't it even more difficult to find a case that was not solved ten years ago now ten years later?"
"No matter how difficult it is, we have to find it." Liao Kai, who seldom spoke, finally confided: "We also know that this kind of task is very difficult, but we are bringing the latest technology, and we are here to do an experiment, or
Let’s just say it’s an attempt.”
Gu Chen glanced at Officer Wang and Lu Weiwei beside him.
The three of them stared at each other, thinking this was a bit interesting.
In a case ten years ago, two out-of-town police officers, armed with the latest technology, were able to find abducted children?
If there is no exact target, it can be said that this kind of search is no different from finding a needle in a haystack.
Gu Chen had come across some cases of missing children before, but they were always found the same day they were lost.
This is not a difficult thing to do now that we have a complete monitoring network.
But if you come to look for a child who was lost ten years ago, not to mention the vast sea of people, even to give you a rough range, it still requires a lot of work.
Lu Weiwei couldn't wait and asked: "Then what kind of cutting-edge technology are you bringing? Is it something new?"
Gao Xu and Liao Kai looked at each other. After thinking for a few seconds, Gao Xu blurted out: "We cooperated with a high-tech company in Pengcheng to develop a cross-age face recognition algorithm."
"Across ages...face recognition algorithm?" Lu Weiwei was stunned for a moment, then calmed down and asked: "What is this?"
"To put it simply, it should be to use this face recognition technology to solve the face recognition problem of the same person in different age groups, and infer what the child will look like when he grows up through data analysis, right? Police Officer Gao, Officer Liao
."
Gu Chen quickly guessed the cutting-edge technology the other party was talking about based on his previous knowledge of face recognition skills given by the system.
Gao Xu and Liao Kai's eyes were obviously stunned for a moment, and they both looked at Gu Chen in disbelief.
Gao Xu said in surprise: "Gu Chen, this technology is still in the testing stage, how do you know?"
"Yes, this time the bureau sent seven of our working groups to different cities to verify the operability of this technology. Logically speaking, no other brother units should know about it, right?" Liao Kai
He also expressed his doubts.
Gu Chen was just skeptical before, but now he got the result from Gao Xu and Liao Kai, and suddenly felt relieved.
Xin said that the technical theories he had mastered before are still useful. At least he now owns this technology.
But there is no direct application on how to control it.
"I just accidentally saw some in relevant academic forums, where they often discuss some, and I can only remember some of the relevant content about face recognition."
Gu Chen just found any reason to stop him.
Gao Xu smiled and said: "It seems that the police in Jiangnan City have very high professional requirements. We only know how to work hard. These overly professional things are not our strengths."
"Then what kind of operation method did you bring this time?" Gu Chen was also very curious and curious about how this technology would be implemented.
Gao Xu glanced at Liao Kai beside him.
The two nodded.
Afterwards, Gao Xu opened his backpack, put a laptop on the table, opened it and said: "Losing a child is a pain that no family can bear. It is very difficult to find clues in the vast sea of people."
"Yes, this is like finding a needle in a haystack." Officer Wang drank his drink and kept staring at Gao Xu's computer.
"So the latest face recognition technology allows artificial intelligence to deeply learn the growth patterns of facial features. With a child's childhood photo, it can recognize faces across ages."
Gao Xu clicked on his file...
Suddenly, hundreds of face images appeared on the page in the folder.
Lu Weiwei and Officer Wang quickly stood up and walked behind Gao Xu.
"What... is this?" Lu Weiwei asked curiously: "Is this your technology?"
"It should be said that this is how we took the photos of the abducted little girl when she was two or three years old, and compared them with the model and data. In the vast sea of people, we got hundreds of pictures related to the lost child and her
A list of people whose parents have high similarity." Gao Xu said.
Officer Wang calculated in his mind: "If the little girl was abducted when she was three years old, then it will be ten years later now, and the little girl must be at least thirteen years old."
"That's right, so we used big data to screen out these people. They are all girls around thirteen years old. The appearance of these people is within the range of automatic matching and screening by the machine."
Gao Xu said and put two photos on the table.
"This is a photo of the little girl before she was lost. She was less than three years old at the time."
Then Gao Xu pointed to another photo and said: "This is a face model photo created by using the latest face recognition technology and allowing artificial intelligence to deeply learn the growth patterns of the facial features."
"In other words, you use the photos constructed by this model to select hundreds of similar photos?" Gu Chen asked.
"Yes." Liao Kai nodded and said, "This is already a major breakthrough because we can narrow down the search scope."
Gu Chen held his chin and hesitated: "You use the existing face recognition system for testing, but the abducted children have been missing for more than ten years. As children gradually grow older, their face shape, eyes, corners of the mouth, forehead, skin, etc.
The identification features will change significantly, and the machine's face recognition rate will also decrease accordingly. With a photo of a 3-year-old child, the effect is very unsatisfactory."
"Gu Chen, this is already very good." Officer Wang felt that Gu Chen didn't need to be picky, so he said: "We can narrow the scope to a few hundred people. Although it will take a lot of time and energy to continue the investigation, but
This is much better than searching without a target. At least there is a target."
"I also think this is good." Lu Weiwei couldn't help wiping her mouth and said: "Once the scope is determined, it is only a matter of time to find the abducted child. Even if you investigate one person a day, the truth will always come out.
."
Listening to the encouragement from Officer Wang and Lu Weiwei, Gao Xu nodded excitedly and said with a smile: "To be honest, we are facing a lot of pressure this time. This system was jointly developed by the Pengcheng City Bureau and this high-tech company.
, if it comes to fruition, it will require a breakthrough among our seven working groups.”
"But for now, we can only investigate step by step. At first, we have been to five cities and investigated nearly 30 people, but the efficiency is not high. This time we come to Jiangnan City, I hope we can gain something.
."
Liao Kai on the side also said: "Yes, although this new technology is not too mature at present, our country is already in the first echelon of this technology in the world, and the application of this technology can already
By assisting the police, we have successfully narrowed down the search scope for children who have been abducted for more than ten years, and we are no longer looking for a needle in a haystack."
"How long have you been checking?" Gu Chen suddenly asked.
Gao Xu was stunned for a moment, and said with some frustration: "The verification has been carried out in different cities for 44 days."
"44 days?" Gu Chen was a little surprised.
"Yes." Although Liao Kai was very tired, his work attitude was still very serious: "We have been working for 44 consecutive days, and many working groups have not achieved corresponding results."
"If in the next investigation, the longer we take to verify, the greater the pressure will be on our working groups and the superior technical departments, so everyone is working hard and wants to be the first to get the results.
."
"No wonder you look like you haven't slept well for many days." Lu Weiwei smiled and said, "I'll buy you some more Red Bull later. You guys can have a good sleep tonight at our Furong branch police dormitory.
, we will arrange the docking work with you tomorrow."
"Thank you very much."
"You're welcome."
After everyone had dinner, Gu Chen took Gao Xu and Liao Kai to the police dormitory area.
After registering their information, a large standard room was arranged for them.
"Although it's not as comfortable as staying in a hotel, it has everything you need. If you need any help, you can call my phone number."
Gu Chen then gave his mobile phone number to the two of them.
"Thank you so much, Gu Chen." Gao Xu also rubbed his bloodshot eyes and smiled bitterly: "The two of us haven't had a good sleep for 44 days. The first thing we do when we open our eyes every day is
Start checking the information of the people within the scope, for fear of delaying time."
"Thank you for your efforts." Liao Kai also thanked the victims.
"What are you talking about? We are all police and should help each other." After Gu Chen finished speaking, he said, "By the way, Gao Xu, can you show me that photo of your little girl again?"
Gao Xu was stunned for a moment.
Gu Chen said with a smile: "That's right. Regarding your work docking, Brother Wang may arrange it tomorrow, so I want to know about the relevant situation first. If you can give me the information about the trafficked girls, maybe it will be better
good."
"Haha, so that's it?" Gao Xu was also hesitated by Gu Chen's sudden concern, but after learning about the situation, he suddenly felt relieved.
"Okay, then just take it over and have a look, and just return it to me tomorrow." Gao Xu glanced at Liao Kai beside him, and said with a smile: "Liao Kai and I are really tired after a long journey. We'll wash up later."
Take a shower and go to bed.”
"Then I wish you a good dream." After taking the information and photos given by Gao Xu, Gu Chen closed the door for the two of them and went directly back to his dormitory.
Due to personnel transfers, Han Yunfei, who previously lived in the dormitory, was transferred along with Xiao Yang.
So the four-person dormitory became a three-person dormitory, and now only Ding Liang and Huang Zunlong still live here.
Opening the door, Ding Liang was lying on the bed listening to music, and Huang Zunlong was leaning on the bedside reading a novel.
Normally at this time, both of them would go outside for a walk, but today it rained heavily, so everyone naturally stayed in the dormitory.
"Gu Chen, what are you holding in your hand?" Huang Zunlong spotted the file in Gu Chen's hand at a glance.
"Do you want to see the information on abducted children?" Gu Chen asked.
Huang Zunlong waved his hand: "Then forget it. You, Gu Chen, brought your work back to the dormitory again. This is not a good habit."
"As long as we can solve the case, why do we care so much?" Gu Chen complained casually, threw the information on the desk, and then sat on the chair and started reading.
Gu Chen first took out a photo of the little girl when she was two or three years old, and blinked twice quickly.
With a "click" sound in my mind, the photo of the little girl was quickly cut into my mind.
In the visual interface at this time, the left side shows scanning and the right side shows saving.
Gu Chen clicked scan directly.
Soon, the little girl's photo was covered by a green grid in the vision, and a line with lightning continued to rise and fall.
This chapter is not over, please click on the next page to continue reading! "Ding!"
As the scan ended, a crisp ringing sound suddenly sounded in my mind.
Gu Chen conducted an on-site audit for the first time based on his facial recognition skills.
Soon, another photo appeared next to the original photo, and the time was shown as four years old.
"Is it really possible to operate like this?" Gu Chen was a little overjoyed. This skill was much faster than expected.
By locking in the little girl's facial shape, eyes, corners of mouth, forehead, skin and other identifying features, although the changes occurred a year later, the basic points remained the same.
"Perhaps the direction of cooperation between the police in Pengcheng and high-tech enterprises is also based on this aspect? But the face recognition rate of the machine will decrease as the age of the abducted person increases.
With a photo of a 3-year-old child, the effect is very unsatisfactory.”
Gu Chen turned to look at Ding Liang and Huang Zunlong behind him.
Neither of them noticed anything unusual about themselves, so Gu Chen looked at the second photo again, which was the calculated photo of the little girl when she was four years old.
Later, Gu Chen used his facial recognition skills to scan the second photo again, and obtained a photo of the five-year-old girl.
So, the third picture, the fourth picture, until Gu Chen scanned the picture of the thirteen-year-old girl, a clear outline had already appeared in Gu Chen's visual interface.
Gu Chen quickly compared the machine-calculated photos provided by Gao Xu and Liao Kai.
It can be said that the gap between the two is quite large.
If the photos provided by Gao Xu and Liao Kai were a general appearance, then Gu Chen used his face recognition skills to scan and get a clear photo.
Now my own photos are more accurate than the photos provided by Gao Xu and Liao Kai.
"This is it." Gu Chen tried several times, but was unable to retrieve the photo. He could only take out a pen and paper from the drawer, and began to draw a sketch on the straw paper using the image of the photo in his mind.
Half an hour has passed...
Gu Chen wiped the sweat from his forehead and felt that the portrait in his hand was even more lifelike.
Compared with the photos simulated by the machine, the appearance given by Gu Chen is obviously more three-dimensional.
"Oh my god, when did our Gu Chen become a great painter?" Ding Liang came up behind him at some point, and when he saw the sketch drawn by Gu Chen, his face was shocked.
Huang Zunlong also came to Gu Chen's side, picked up the sketch, and compared it with the photo calculated by the machine. He couldn't help but wonder: "Hey, Gu Chen, although your painting is very good, it is nothing like the characters in this photo.
Like?"
"I didn't say I wanted to draw based on the photo." Gu Chen nailed the sketch to the target on the wall with a dart, and then nailed the machine-calculated photo next to the sketch.
"Ding Liang, Huang Zunlong, you two can help me take a look and give me some advice." Gu Chen said.
Ding Liang crossed his arms and pondered for a long time, then said: "Your sketch is more realistic and real, and this photo..."
After hesitating for a few seconds, Ding Liang raised his head and said, "This photo makes me feel a bit like a simulated character."
Gu Chen said "Yes" without agreeing or disagreeing.
Ding Liang actually got to the point. Yes, the new machine-simulated face recognition algorithm and cross-age calculation method are reliable, but the error is also large.
After letting artificial intelligence deeply learn the growth patterns of facial features, the face model photos created can only be a relative existence.
Therefore, if you use this cross-age calculation to filter the photos, you will get a lot of data.
This is why the workload of Gao Xu and Liao Kai is so heavy. The fundamental reason is that the calculation method of this machine will gradually change the facial shape, eyes, corners of the mouth, forehead, skin and other identifying features as the age of children gradually increases.
obvious changes.
Therefore, the machine's face recognition rate will also decrease.
Gu Chen looked at the portrait of his plain cat and couldn't help but fell into deep thought: "If the recognition rate of machine calculations will decrease, then I will use the face recognition skills I carry to screen one by one to see if this photo can represent...
What will that three-year-old girl look like ten years from now?"
Although he is not sure, Gu Chen has already mastered part of the use of facial recognition skills.
Now that he encounters photos with certain difficulty characteristics and a certain age span, he no longer makes judgments based only on existing information.
So, Gu Chen put the portrait he sketched back into the file bag and prepared to take it to the office tomorrow and use Gao Xu's computer to compare it to see if the character he sketched actually existed in Gao Xu's computer files.
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