Chapter 219 Another Approach
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 no easier than graphic detection, and may even be more difficult. Especially in solving crimes, it is more important than graphic detection.
Technical men have shortcomings and advantages. I admire real men with excellent skills.
Lu Chuan is obviously very skilled.
"Teacher Lu! Just call me Chen Kun. I have heard of you a long time ago. We are in the same detachment but we are too busy at work and never have the chance to meet."
Took Lu Chuan with both hands and handed it over. Chen Kun continued: "What case?"
"A fraud case in QZ City. The suspect's profile picture is not clear and the identity of the suspect cannot be determined by face comparison. I want to see if I can improve the photo. ”
QZ City?
Chen Kun was slightly stunned.
QZ City has its own detective brigade. How can the cases there be compared here?
Moreover, the QZ City Picture Detective Brigade also has two technicians with good skills, and Chen Kun is relatively familiar with them.
But since he agreed to help, Chen Kun didn't ask too many questions.
Nodding, Chen Kun took the USB drive and inserted it into the computer.
After routinely checking for viruses and finding no problems, 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 and 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.
What enables information communication is the transfer of materials through encrypted USB drives.
This kind of thing is not distributed by ordinary criminal police, only technical police use it more.
The computer used by Chen Kun is the best-equipped computer in the scout team.
It is much better than the computer used by ordinary technicians, and naturally much 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 portrait processing.
Lu Chuan doesn’t use this software very often, but he has come across it.
Advanced fingerprint identification and analysis skills are instilled with experience in this area. Although it cannot be said to be proficient, there is no problem in normal use.
The technical man who was working subconsciously concentrated all his energy.
Cracklingly pressing the shortcut keys on the keyboard, but Chen Kun rarely operated the mouse.
Generally, technicians who process images mostly operate through the mouse.
Only those who are truly proficient in image processing skills and familiar with image processing software can use the keyboard and use shortcut keys.
As soon as Chen Kun got started, he gave several people the feeling of being superior.
Old god Wu Kaiyue folded his arms and watched Chen Kun process the images with admiration.
In fact, in the detection of cases in recent years, the status of the graphic investigation team has tended to surpass that of the investigation office.
With the development of social economy, more and more cameras of various types are installed.
For example, in the main urban area of Haizhou City, basically every street and every neighborhood is covered by surveillance cameras.
Although the ownership of these cameras is relatively complicated, some are installed by communities, some are installed by road administration, some are installed by traffic police, and some are installed 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. Manual scanning is still required.
But even so, it means that there are cameras near the crime scenes of many cases, and maybe one of the cameras captured the incident.
Although the videos taken by some cameras are not very clear due to angle problems, distance problems, and pixel size problems, they at least provide a direction for solving crimes.
Originally, people from the criminal investigation detachment, police station or criminal police brigade did the work of scanning videos themselves.
But after the establishment of the Picture Scout Brigade, this phenomenon slowly changed. Professional people do professional things, and scanning videos is a very boring job. It is of course a good thing to have someone take on it.
This has also resulted in the detection clues for many cases being provided by the Picture Detective Brigade.
Detecting criminal cases is a top priority within the public security system. Whoever can provide evidence and clues to detect criminal cases will have a higher status.
It is precisely because the Detective Brigade has discovered many clues in handling cases over the years and has received a lot of funds. In addition to the work needs, computer upgrades are 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 investigation office, the map investigation team did a lot of work and scanned a lot of videos, but not many key clues were provided.
Wu Kaiyue glanced at Lu Chuan, who was watching Chen Kun's processing of images attentively.
Not to mention anything else, at such a young age, just over half a year after joining the company, he received two first-class individual merits.
Hey...
It's so irritating that people are more popular than others. Wu Kaiyue has been a criminal policeman all his life and has never seen what a first-class meritorious officer looks like.
But Lu Chuan was able to get first-class merit because he solved the backlog of murder cases through the fingerprint battle.
This is a real ability.
After all these years, why haven’t others matched those fingerprints?
While thinking about it, the regular keyboard tapping suddenly stopped.
Is this done?
Wu Kaiyue looked intently, but the picture on the computer screen was still blurry.
As the captain of the Scout Brigade, Wu Kaiyue also has a technical background. Although he has become a leader and has been engaged in more management in recent years, his skills have declined a bit and he cannot keep up with some of the top technicians in the brigade, but his abilities are still there. Not bad.
So, Wu Kaiyue could tell at a glance that Chen Kun's image processing must have encountered a bottleneck.
“Not enough pixels?”
After hearing Wu Kaiyue's question, Chen Kun calmed down.
“After the picture is enlarged, the noise removal is relatively smooth, and the sharpening is also good. However, the pixels of the original photo are too low, and it is very difficult to meet the standards of face recognition.”
Wu Kaiyue frowned.
The work that the Pictorial Reconnaissance Brigade is responsible for can generally be divided into three major categories.
The first is to scan videos and find traces of criminal suspects in massive videos.
This is a boring and repetitive job that does not require a high technical level, but does require carefulness and a strong sense of responsibility.
Most of the people in the team are engaged in this job, and many auxiliary police officers and contract workers also do this.
The second job is image restoration.
Technically repair some damaged images or videos 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 first two tasks.
Whether it is scanning videos or image restoration, there is always something unsatisfactory after completion.
Technical means should be used to improve the clarity of the restored images or videos.
The purpose is to allow a piece of video material or a photo to become a clue and become judicial evidence.
Among all image work, it is easier to deal with the original video or the original picture being partially damaged.
The most difficult thing is that the pixels of the original video or picture are very low. Just like congenital diseases, it is difficult to make up for congenital defects no matter how hard you try.
"Teacher Chen, can you try another method and use Fourier transform?"
(End of this chapter)