In the past six months, in several murder cases of the criminal investigation detachment, Lu Chuan has performed well.

Especially when I heard that I recently participated in the fingerprint battle organized by the city bureau and the provincial department, I won two first-class merits!

Fingerprint identification and analysis is not easier than graphic investigation, or even more difficult, especially in solving crimes, which is more important than graphic investigation.

Technical men have disadvantages and advantages, and I admire real men with excellent skills.

Lu Chuan is obviously skilled.

"Teacher Lu! Just call me Chen Kun, I've heard of you for a long time, we are in the same detachment but we are too busy with work, so we never have a chance to meet."

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

"In a fraud case in QZ City, the suspect's profile picture is not clear, and there is no way to determine the identity of the other party by face comparison, so I want to see if I can improve the clarity of the photo."

QZ City?

Chen Kun was slightly stunned.

QZ City has its own graphic investigation team, how can the case over there be compared here?

Moreover, the QZ City Graphic Investigation Brigade also has two technicians with good skills, and Chen Kun is still familiar with them.

But since he promised to help, Chen Kun didn't ask too much.

Nodding, Chen Kun took the USB drive and *** the computer.

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

The USB drive used by Lu Chuan is a special USB drive configured by the criminal investigation detachment, which has been encrypted.

The public security system has its own internal Internet network.

This independent network is particularly secure and physically separated from the outside network.

The way to communicate information is to transfer materials via encrypted USB drives.

This kind of thing will not be distributed by ordinary criminal police, and only technical police officers use it more.

The computer used by Chen Kun is the best equipped computer in the graphic reconnaissance brigade.

It is much better than the computer used by the average technician, and naturally it is also a lot more expensive.

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

Lu Chuan doesn't use this software very often, but he has also been exposed to it.

In the advanced fingerprint identification and analysis skills, there is experience instilled in this area, although it is not proficient, but it is no problem to use normally.

The technical man who worked subconsciously concentrated all his energy.

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

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

Only people 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 feeling that several people were tall.

Wu Kaiyue's old god was holding his arms and watching Chen Kun process the image with appreciative eyes.

In fact, in the investigation of cases in recent years, the status of the graphic investigation brigade has a tendency to surpass that of the on-site investigation office.

With the development of social economy, the installation of various types of cameras is also more.

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 more complicated, there are community installations, road administration, traffic police installations, and individual installations.

These surveillance videos are not connected to the network to form big data, and there is no way to directly search for the desired target through intelligent algorithms or some kind of system, and they still need to be scanned manually.

But even so, it means that many cases have cameras near the crime scene, and it is not known which camera captured the process of the crime.

Although some cameras do not shoot very clear videos because of the problem of angle, distance, and pixel size, at least they provide a direction for solving the case.

Originally, the work of scanning videos was done by the people of the criminal investigation detachment, police station or criminal police brigade.

However, after the establishment of the Graphic Reconnaissance Brigade, this phenomenon slowly occurred

of the transformation.

Professional people do professional things, and scanning videos is a very boring job, and it is of course a good thing for someone to take on it.

This has also led to the fact that many clues to the detection of cases are provided by the Graphic Investigation Brigade.

Cracking criminal cases within the public security system is a top priority, and whoever can provide evidence and clues for solving criminal cases will have a high status.

It is precisely because the Graphic Investigation Brigade has found a lot of clues in the handling of cases over the years, and has obtained a lot of funds, and in addition to the needs of work, computer upgrading 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 are provided by the current investigation office, the graphic investigation team has done a lot of work, and the video has been scanned a lot, but there are not many key clues provided.

Wu Kaiyue glanced at Lu Chuan, and the other party was concentrating on Chen Kun's processing of the image.

Not to mention anything else, at a young age, he has just been employed for more than half a year, and he has won two personal first-class merits.

Ay......

It's really more popular than people, Wu Kaiyue has been a criminal police officer all his life, and he has never seen what a first-class skill looks like.

But Lu Chuan was able to obtain first-class merit through fingerprint battles and solving the backlog of murder cases.

It's a real capability.

After all, after so many years, why didn't others compare those fingerprints?

Thinking about it, the sound of keyboard tapping that had been regular suddenly stopped.

Is this done?

Wu Kaiyue looked at it, and the picture on the computer screen was still blurry.

As the captain of the graphic reconnaissance brigade, Wu Kaiyue is also from a technical background, although he has been a leader over the years, he has been engaged in management more, and his technology has regressed, and he can't catch up with some of the top technicians of the brigade, but his ability is not bad.

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

"Not enough pixels?"

Hearing Wu Kaiyue's question, Chen Kun came to his senses.

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

Wu Kaiyue's brows furrowed.

The work undertaken by the Graphic Reconnaissance Brigade can generally be divided into three categories.

The first is to scan the video, and in the massive video, the traces of the suspect are found.

This is a boring and repetitive job that does not require a high level of skill, but requires a careful and responsible job.

The vast majority of the team is engaged in this work, and many auxiliary police officers and contract workers do this work.

The second task is image restoration.

Technical repair of some damaged images or videos to achieve the purpose of not being able to see clearly to seeing clearly.

The last item is what Chen Kun is doing now.

Image enhancement.

This is a complement and enhancement to the first two pieces of work.

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

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

The purpose is to make a video or a photo become a clue and become judicial evidence.

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

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

"Teacher Chen, can you try a different method and use the Fourier transformation?"