Attending ex-girlfriend's wedding, arresting the groom's officer on the spot

Chapter 219
In the past six months, Lu Chuan has performed well in several murder cases of the Criminal Investigation Detachment.

Especially when I heard that I recently participated in the fingerprint competition organized by the Municipal Bureau and the Provincial Department, and won two first-class merits!

Fingerprint identification and analysis is not as easy as image detection, or even more difficult, especially in solving crimes, which is more important than image detection.

Technical men have their disadvantages as well as their advantages. I admire real men with excellent skills.

Lu Chuan is obviously skilled.

"Ms. Lu! You can just call me Chen Kun. I have heard of you a long time ago. We are in the same team but we are too busy with work, so we never have a chance to meet."

Taking the USB drive from Lu Chuan with both hands, Chen Kun continued, "What case?"

"A fraud case in QZ City. The suspect's portrait is not clear, and the face comparison can't confirm the identity of the other party. I want to see if I can improve the clarity of the photo."

QZ city?
Chen Kun was slightly taken aback.

QZ City has its own graphic investigation brigade, how can the cases over there be compared here?
Moreover, there are also two technicians with good skills in the QZ City Graphic Investigation Brigade, and Chen Kun is familiar with them.

But since he agreed to help, Chen Kun didn't ask too many questions.

Nodding, Chen Kun took the USB flash drive and inserted it into the computer.

After checking and killing the virus routinely, and there was no problem, Chen Kun opened the USB flash drive.

The USB flash drive used by Lu Chuan is a special USB flash drive configured by the Criminal Investigation Detachment, which has been encrypted.

The public security system has its own internal Internet network.

The security of this independent network is particularly high, and it is physically separated from the external network.

The only thing that can realize information communication is to transfer materials through encrypted USB drives.

This kind of thing is not distributed by general criminal police, only technical police use it more.

The computer used by Chen Kun is the one with the best configuration in the graphic investigation brigade.

It is much better than the computers used by ordinary technicians, and naturally it is also much more expensive.

The image processing software used by Chen Kun is not the PS software commonly used by Lu Chuan, but a relatively small software that specializes in processing portraits.

Lu Chuan doesn't use this software very often, but he has also come into contact with it.

Among the advanced fingerprint identification and analysis skills, there is experience in this area. Although it is not proficient, there is no problem in normal use.

The technical man who got to work subconsciously concentrated all his energy.

Crackling and pressing the shortcut keys on the keyboard, but Chen Kun rarely operated the mouse.

Generally, technicians who deal with images mostly operate with a mouse.

Only those who are really proficient in image processing skills and familiar with image processing software will use the keyboard and use shortcut keys.

As soon as Chen Kun got started, he gave a few people the feeling that they were tall.

The old god Wu Kaiyue folded his arms and watched Chen Kun process the image with admiring eyes.

In fact, in the detection of cases in the past few years, the status of the graphic investigation team has a tendency to surpass that of the current investigation office.

With the development of social economy, there are more and more cameras installed.

For example, in the main urban area of ​​Haizhou City, basically every street and every community is covered by surveillance cameras.

Although the ownership of these cameras is relatively complicated, some are installed by the community, some by the road administration, some by the traffic police, and some by individuals.

These surveillance videos are not connected to the Internet to form big data. There is no way to directly search for the desired target through intelligent algorithms or some kind of system, and manual scanning is still required.

But even so, it also means that there are cameras near the scene of the crime in many cases, and one of the cameras may have captured the process of the crime.

Although the video captured by some cameras is not very clear due to the problem of angle, distance and pixel size, at least it provides a direction for solving the case.

Originally, people from the criminal investigation detachment, police station, or criminal police brigade did the work of scanning videos.

But after the establishment of the graphic investigation team, this phenomenon gradually changed.

Professionals do professional things, and scanning videos is a very boring job. It is of course a good thing that someone undertakes it.

This also led to the clues to solve many cases, which were provided by the graphic investigation team.

Detecting criminal cases in the public security system is the top priority. Whoever can provide evidence and clues for the detection of criminal cases has a high status.

It is precisely because the Graphic Investigation Brigade has discovered a lot of case clues in handling cases over the years, and has obtained a lot of funds. In addition to work needs, the computer upgrade is the fastest in the entire system.

But in the past six months, Wu Kaiyue's life has not been very comfortable.

Because the key clues of some recent cases were provided by the survey office, the graphic investigation team did a lot of work and scanned a lot of videos, but they did not provide many key clues.

Wu Kaiyue glanced at Lu Chuan, who was watching Chen Kun's processing of the image intently.

Among other things, at a young age, just over half a year after joining the job, he has won two personal first-class merits.

Hey……

It's true that people are more popular than people. Wu Kaiyue has been a criminal policeman all his life, and he has never seen what a first-class meritorious service looks like.

However, Lu Chuan was able to obtain first-class merit through the fingerprint battle and the detection of homicide cases.

This is a real ability.

After all, after so many years, why didn't others match those fingerprints?
Thinking about it, the original regular keyboard tapping suddenly stopped.

This is done?
Wu Kaiyue looked intently, but the picture on the computer screen was still blurry.

As the captain of the Graphic Investigation Brigade, Wu Kaiyue is also from a technical background. Although he has become a leader in recent years, he has engaged in more management and his technology has regressed a bit. He can't keep up with some of the top technicians in the brigade, but his ability is not bad.

Therefore, Wu Kaiyue could tell at a glance that Chen Kun's image processing must have encountered a bottleneck.

"Not enough pixels?"

Hearing Wu Kaiyue's question, Chen Kun regained his composure.

"After the image is enlarged, the noise removal is relatively smooth, and the sharpening is also good, but the pixels of the original photo are too low, and it is very difficult to meet the standard of face recognition."

Wu Kaiyue frowned.

The work that the graphic investigation team is responsible for can generally be divided into three categories.

One is to scan the video, and find the trace of the suspect in the massive video.

This is a boring and repetitive work that does not require a high technical level, but it requires carefulness and a strong sense of responsibility.

The vast majority of people in the team do this job, as do many auxiliary police officers and contract workers.

The second job is image restoration.

Perform technical repairs on some damaged images or videos, so as to achieve the purpose of changing from unclear to clear.

The last item is what Chen Kun is doing now.

Image enhancement.

This is a supplement and improvement to the previous two works.

Whether it is scanning video or image restoration, there are always some unsatisfactory places after completion.

It is necessary to improve the clarity of the repaired image or video through technical means.

The purpose is to make a piece of video material or a photo into a clue and a judicial evidence.

In all image work, the original video or original picture is partially damaged, which is easier to deal with.

The most difficult thing is that the pixels of the original video or picture are very low, just like a congenital disease, it is difficult to make up for the congenital defect no matter how hard you work the day after tomorrow.

"Mr. Chen, can you change the method and try using Fourier transform?"

(End of this chapter)