Chapter 125: Upper Limit

Image investigation is a criminal science major with a very high upper limit and actually a very low lower limit.

In terms of the upper limit, just the technology of image denoising already has countless noise and clear image models, and it is still increasing.

And different noise models and clear image models, plus different solving methods, form various denoising algorithms. There are hundreds of them.

For example, the well-known 3D denoising, BM3D denoising, wavelet denoising, non-local mean denoising, etc.

Writing algorithms and making models is not the upper limit of image investigation. To substantially process the images and videos faced by image investigation, one needs to master various algorithm models while having considerable experience in processes and methods, and also have considerable mastery of related technologies.

Of course, such upper-limit requirements, not to mention in the province, even nationwide, may not be able to be met.

In a place like Ningtai County, in most cases, the existence of imaging offices and the like is just to meet the lowest limit requirements—find surveillance videos and keep an eye on people.

Occasionally, not being able to keep an eye on them doesn't matter.

Zhuang Wei and others originally worked just to meet the lowest limit requirements. Now, Jiang Yuan has shown them the existence of a quasi-upper limit.

And to jump over this chasm, it must be very painful.

Seeing it but not being able to touch it is truly uncomfortable.

Jiang Yuan took out another set of videos, looked at the third-generation imaging man next to him, thought for a moment, and said simply: "Different graphics and images require different methods. As far as current technology is concerned, it is impossible for a universal algorithm to be compatible with all graphics. Of course, you can try a few common modules, but the effect will definitely not be too good."

Saying that, Jiang Yuan took out a wavelet transform that was completely different from just now and filled in the parameters.

The core of image enhancement is algorithms. Using different software is actually choosing different algorithms.

For users, after choosing an algorithm, the most important task is to fill in parameters. And it's a large amount of parameters.

The recordings of cases are all different, and the targets needed are different processing flows. These are problems that are easy for humans to solve but difficult for programs to solve.

It's like the video Jiang Yuan sees now, which is a long-range, backlit surveillance video. The two people who are the targets appear in the lower left corner of the video, so they are slightly deformed.

And these are places that algorithms are not easy to take care of, so Jiang Yuan needs to fill in parameters and delineate the scope and interval.

This process occasionally requires other programs to help judge, or it is judged by the user's experience.

Jiang Yuan opened and closed multiple software, filled in a large number of numbers, and then started the program again.

During this process, the third-generation imaging man watched clearly and slowly became desperate.

"You didn't seem to fill in so many things last time." The first-generation imaging man, Zhuang Wei, asked Jiang Yuan very politely.

Jiang Yuan let out an "En" and said: "The conditions of the video this time are worse. In addition, the algorithms used are not the same, and some software requires more parameters to be filled."

Last time, Jiang Yuan operated on the computer in the imaging office. The algorithms their software could choose were few, and the parameters that could be filled were few. The software installed on Jiang Yuan's own computer was naturally more suitable for himself.

And it was more complicated.

Zhuang Wei and the other three looked at each other, not knowing what to say.

Wei Zhengguo didn't care about that much. He sat on the side, smoked two cigarettes with Wu Jun with peace of mind, and listened to the printer creaking.

"I'll get it." Wei Zhengguo jumped up and ran to pull over the four pictures of the second video, moving as quickly as a young habitual thief.

Jiang Yuan took four frames of pictures this time and processed them together.

This was also one of the reasons for the large number of parameters. Video processing was relatively complicated, and it was easier to get things out with more pictures.

After spreading several pictures on the table and looking at them for a while, Wei Zhengguo could only shake his head, took a photo, and said: "I'll show my colleagues. Maybe it's a newcomer now."

Wei Zhengguo found two groups and sent the photos out.

Jiang Yuan packed up his things and handed the disks and other items used for copying to Zhuang Wei.

Just as the roaring sound of the computer host stopped, Wei Zhengguo's mobile phone rang.

"Where did you find the picture?" The phone was connected, and there was a question from the other side immediately.

Wei Zhengguo laughed: "That can't be said, the case is still under investigation. Did you recognize the person inside? Do you know the name?"

The other side of the phone hesitated for a few seconds and said: "I think it looks like him, not sure if it is. You go to the library and search for Zhang Wanjie. See if it is."

"The case in your hand?"

"The past one, listed as a fugitive."

"Ha, then I'll take a look. Thank you. I'll treat you to a cigarette later." Wei Zhengguo said and hung up the phone.

Jiang Yuan didn't need him to say it. On the computer that had just finished roaring, he opened the "National Fugitive Information System" and entered the words "Zhang Wanjie".

"Robbery, snatching, burglary, undoubtedly a big thief." Wei Zhengguo said, his mouth curling up. His mood was like suddenly discovering that one of the beauties in a temporary inspection was a man, and a fugitive.

"Ministry-level wanted order." Zhuang Wei sighed: "Caught a ministry-level one just like that."

The ministry's wanted order is divided into two levels. Level A is a list made by the ministry itself, which is a key fugitive personnel considered by the ministry. Level B is a list made by the ministry at the request of provincial departments everywhere, and the rewards and docking, etc., are also handed over to the provincial department to do.

However, for grassroots police, catching a Level B fugitive is already a very rare thing.

And for image investigation, finding fugitives is actually routine work. Like the image investigation team in Changyang City, there are police officers looking for fugitives all year round, and their work content is like searching the library for fingerprints.

As far as the current monitoring resources in the country are concerned, anyone has the ability to become the protagonist of the video, it just depends on who can have the eyes to recognize the pearl.

Of course, this matter is definitely not easy, especially those who are on the ministry's wanted list, all of which are not found by the county bureau, not found by the city bureau, then reported to the provincial department, and then to the ministry.

Among them, not every step has people trying hard, but various comparisons are indispensable.

Catching a fugitive easily is equivalent to easily obtaining a third-class merit. In essence, there is still a bit of Versailles component.

Wei Zhengguo was one step away from the fugitive, but gritted his teeth and said: "It only counts if you catch him. If you only have clues, it's a waste."

"Do you want to follow the surveillance?" Zhuang Wei participated actively.

Wei Zhengguo couldn't help but look at Jiang Yuan.

"They are more convenient to find than me." Jiang Yuan said very practically. His main ability is concentrated in image enhancement. As for how to follow the surveillance, he is not clear.

Wei Zhengguo then showed a smile to Zhuang Wei: "Then if you can find the foothold of this guy, that would be the best."

He didn't know how Stupid Guo knew Zhang Wanjie, but since he was a guy on the fugitive list, he was probably very alert. It is very likely that he would not tell Stupid Guo his foothold.

Zhuang Wei enthusiastically invited Wei Zhengguo back to his office.

In a place like Ningtai County, you won't meet a fugitive in a few years, and he is also very active. Although it is also possible that Zhuang Wei and others did not have the ability to pull out the fugitive before, but just following the surveillance, Zhuang Wei is still enough.

Wei Zhengguo made a phone call while entering the imaging office.

Stupid Guo's side must strengthen the interrogation, and he even has expectations for Stupid Guo.

Such a stupid thief, you say he is for friendship, so he picked up the fugitive at the bus station? Wei Zhengguo didn't believe it at all.

From the fact that Stupid Guo's life has improved, his artistic sentiment has been exerted, and stealing has become a daily hobby, Stupid Guo must have a new way of making money, and it is still very stupid.

Wei Zhengguo hopes to pull out more things through Stupid Guo.

"Let me see, let's follow the road of the bus station to find it." Zhuang Wei found more surveillance videos from the cloud and watched them bit by bit.

Wei Zhengguo followed and watched, helping to analyze the route from time to time.

Watching, Zhuang Wei clicked his tongue twice and said: "Jiang Yuan's luck seems to be very good. He can always catch such big cases."

Wei Zhengguo stared at the screen and couldn't help but smile: "Maybe the technology he uses is much higher than the normal level."

Zhuang Wei was stunned. After thinking about it carefully, it really is this truth.

Just the video of the bus station, if it were handed over to them, it would definitely be a stone falling into the water, and it would be gone. The so-called fugitive pursuit would naturally be out of the question.

And with Zhuang Wei's understanding of image investigation, unless it is handed directly to the image investigation team of the provincial department, otherwise, the level of the Qinghe City Bureau is just like that. But without solid evidence, how could the video be handed over to the image investigation team of the provincial department?

Zhang Wanjie may not know the details in the police system, but his experience of long-term escape can probably tell him where the safety boundary is.

Jiang Yuan just happened to break this boundary, so he pulled him out very easily.

Zhuang Wei figured it out, and the sense of loss doubled.

To clearly surpass colleagues and exceed the industry's average level is actually a very high requirement.

After figuring this out, Zhuang Wei's tense muscles relaxed again.

Whatever.

Tired. ===== CHAPTER 126 =====