In the past six months, Lu Chuan has shown impressive performance in several murder cases handled by the Criminal Investigation Team.

It is especially noteworthy that he recently participated in the fingerprint campaign organized by the city bureau and the provincial department, earning two first-class merits!

Fingerprint identification and analysis is not easier than image investigation, in fact, it is even more challenging, and it is especially crucial in solving cases, more so than image investigation.

Technicians have their flaws and strengths, and I admire those who have solid technical skills.

Lu Chuan is clearly one of those with strong technical skills.

"Teacher Lu! Just call me Chen Kun, I've heard about you for a long time. We work in the same team, but we're always too busy to meet."

After accepting the USB drive handed over by Lu Chuan, Chen Kun continued, "What's the case?"

"A fraud case in Qinzhou City, the suspect's image is unclear, and facial recognition can't confirm the identity. I'm wondering if we can enhance the photo's clarity."

Qinzhou City?

Chen Kun was slightly taken aback.

Qinzhou City has its own image investigation team. How did the case end up needing comparison here?

Moreover, the Qinzhou City's image investigation team has two good technicians, whom Chen Kun is quite familiar with.

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

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

After routinely scanning for viruses and finding no problems, Chen Kun opened the USB drive.

The USB drive used by Lu Chuan is a special one assigned by the Criminal Investigation Team, with encryption applied.

The public security system has its own internal internet network.

This independent network is particularly secure, being physically separated from the outside internet.

The transfer of materials is achieved using encrypted USB drives.

Such tools aren't generally issued to ordinary detectives, but are used frequently by technical officers.

The computer used by Chen Kun is the best-equipped machine in the image investigation team.

It's significantly better than the computers used by regular technicians, and naturally much more expensive.

The image processing software used by Chen Kun is not the regular PS software used by Lu Chuan but a more niche software dedicated to portrait processing.

This software isn't frequently used by Lu Chuan, but he has come across it before.

Senior fingerprint identification analysis skills include experience in this area, and although not mastery, he can use it normally.

A technician at work instinctively focuses all their energy.

Rapidly tapping the keyboard shortcuts, Chen Kun seldom used the mouse.

Generally, image processing technicians operate using a mouse.

Only those truly skilled in image processing and familiar with the software will use keyboards and shortcuts.

Chen Kun gave off a sophisticated impression as soon as he started.

Wu Kaiyue stood by with arms folded, watching Chen Kun process the image with an appreciative gaze.

In recent years, in case-solving, the position of the image investigation team has tended to surpass the crime scene investigation office.

With the development of the economy, the installation of various cameras has increased.

For instance, in the main urban area of Haizhou City, almost every street and neighborhood is covered by surveillance cameras.

Although the ownership of these cameras is quite complex — some installed by communities, some by road administration, some by traffic police, and some privately —

these surveillance videos are not networked into big data. There's no way to search directly for desired targets through intelligent algorithms or systems, and manual oversight is still required.

However, even so, it means that crime scenes in many cases have cameras nearby, which might capture the crime process.

Although some cameras have issues with angles, distances, and pixel sizes, and the footage may not be very clear, it at least provides a direction for solving the case.

Originally, video scanning was done by the Criminal Investigation Team, local police stations, or the Criminal Investigation Team members themselves.

But after the image investigation team was established, this phenomenon began to change gradually.

Professionals handle professional matters, and video scanning is a tedious task. It's certainly a good thing to have someone take on this responsibility.

This has also led to most of the case-solving clues being provided by the image investigation team.

In the public security system, solving criminal cases is a top priority, and whoever provides evidence or clues carries more weight.

Because the image investigation team discovered numerous case clues over the years, they received more funding. Coupled with work needs, their computer upgrades are the fastest within the system.

Yet, in the past six months, Wu Kaiyue hasn't been having a very comfortable time.

Because recent cases' key clues were offered by the crime scene investigation office, the image investigation team has done a lot of work scanning videos, but hasn't provided many critical clues.

Wu Kaiyue glanced at Lu Chuan, who was intently watching Chen Kun process the image.

Regardless of other things, young as he is, having just joined a little over half a year, he has already earned two personal first-class merits.

Sigh...

The comparison is indeed daunting. Wu Kaiyue has worked as a detective all his life and has never seen what a first-class merit looks like.

But Lu Chuan earned his first-class merit through the fingerprint campaign and solved long-standing murder cases.

This is genuine capability.

After all, so many years have passed, and why hasn't anyone else managed to match those fingerprints?

As thoughts raced, the previously rhythmic keyboard tapping suddenly stopped.

Is it finished?

Wu Kaiyue focused and noted that the image on the computer screen was still blurry.

As the head of the image investigation team, Wu Kaiyue also has a technical background. Although in recent years as a leader, he's been more involved in managing and his skills have regressed somewhat, failing to match some top technicians in the team, his abilities remain considerable.

Hence, Wu Kaiyue immediately recognized that Chen Kun's image processing hit a bottleneck.

"Is the pixel not enough?"

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

"Removing noise after enlarging the image was quite smooth, and the sharpening process went well, but the original image's pixel is too low, making it very difficult to meet facial recognition standards."

Wu Kaiyue frowned.

Generally, the work handled by the image investigation team can be categorized into three main types.

First is video scanning, where suspects are tracked through large volumes of video footage.

This is a boring repetitive task that doesn't require high technical skills but demands attention to detail and a strong sense of responsibility.

Most of the team, including many auxiliary police officers and contract workers, is involved in this task.

The second type of work is image restoration.

This involves the technical restoration of damaged images or video to make them viewable.

The last type is what Chen Kun is currently doing.

Image enhancement.

This is a supplement and improvement to the first two jobs.

No matter if it's video scanning or image restoration, there's always some dissatisfaction afterward.

The goal is to use technical means to enhance the clarity of repaired images or videos.

The aim is to turn video materials or photos from clues into judicial evidence.

Among all the image tasks, dealing with partially damaged original videos or pictures is relatively easier.

The hardest part is when the original video or picture has extremely low pixels, akin to a congenital disease, whereby postnatal efforts struggle to overcome innate defects.

"Teacher Chen, can we try an alternative method using the Fourier transform?"

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