The office has returned to calm, just like a study room. Occasionally, someone shows off their affection, which seems to attract everyone's attention, but after the incident disappears, everyone will basically forget about it.
The work in front of everyone is the most important thing at this time.
Jiang Yuan also returned to his seat and continued to screen for fingerprints that fit him.
He deliberately looked for fingerprints that were vague and in poor condition for comparison.
Because compared to ordinary fingerprint inspection, he can also use "image enhancement technology (LV3)" to process fingerprint images.
In fact, the current automatic fingerprint recognition system also processes images. Operations such as thinning and denoising, ridge segmentation, and ridge extraction are all automatically completed in the computer background, and there is no need for fingerprint inspectors to do too much.
suspicious.
But with the current technical level, it is impossible for an automated automatic fingerprint identification system to match the manual level of an expert.
Jiang Yuan directly pulled out a surveillance posture and took a fingerprint image. In just a moment, he selected a blurry picture that looked like the bottom of a pot.
Jiang Yuan's computer host became agitated because of this.
Ouch, ouch, ouch...
The host machine Jiang Yuan is using now has a pretty good configuration. It is a new computer purchased by the provincial department. However, after it was assigned to the trace inspection position, it has hardly worked on the graphics card and CPU in more than two years.
At Jiang Yuan's request, its fan started spinning crazily, and the sound it made seemed like it was shouting: Why am I so hot? I'm so scared.
Jiang Yuan stood up, waved the Zhonghua in his hand to Li Zemin next to him, and invited: "Go outside for a smoke?"
Li Zemin also felt that Jiang Yuan's machine was noisy and wanted to smoke cigarettes more, so he immediately followed Jiang Yuan's footsteps.
The two of them left the office, gave each other a cigarette, and started puffing away.
Jiang Yuan had only smoked a cigarette, holding it with his hand most of the time, and looking ahead blankly.
Li Zemin didn't care about that. After smoking one, he sighed with satisfaction, took another one, and asked, "Why is your computer so noisy?"
Jiang Yuandao: "I'm doing image processing. Will it be too noisy?"
Li Zemin knew a little better and couldn't help but look at Jiang Yuan and said: "The fingerprint processing is so loud, so your skills are quite powerful."
"Well, I will do image enhancement like surveillance video and try it on fingerprint images. I don't know if it will have any effect."
"If it works, let someone give you a separate place, or find a separate place to process the images." Li Zemin said with emotion: "You young people are really amazing, unlike us, who were exhausted from learning fingerprints back then...
…By the way, how far can your technology achieve the image?”
"It's hard to say. What's vague will become clearer, but it's targeted." Jiang Yuan didn't explain it too clearly because he hadn't really experienced it himself.
In general, image enhancement technology, when used on fingerprints, is still a bit overkill.
Whether it is suitable or not, he himself cannot tell clearly.
However, one thing is very clear. During the fingerprint battle, the dozens of fingerprint experts present were actually competing.
When encountering a fingerprint, the first thing everyone thinks of is whether it has been seen by other fingerprint experts. Why can't it be compared? What is the reason why it cannot be compared?
If the reason for failing to compare is a matching problem, then it will be useless no matter how good your feature points are.
If the incompleteness of the fingerprint is too high, then others will not be able to match it, and it is very likely that you will not be able to match it either.
Because of this, some fingerprint experts have proposed that the strategy in fingerprint battles is "don't do it if it's clear, don't do it if it's too vague, and don't try again if it's not too light."
It sounds very simple, and it seems like a self-referential strategy, but if you think about it carefully, it is actually a very valuable strategy.
In this case, if you encounter fingerprints that are too clear, there is actually no value in doing it. The same goes for fingerprints that are too blurry.
Only fingerprints that are neither light nor heavy are the focus of many fingerprint experts' work. However, when you think about so many fingerprint experts focusing on these fingerprints that are neither light nor heavy, the focus becomes difficult.
Jiang Yuan's ability to process blurry images makes him unique.
Back in the office, Jiang Yuan's computer has stopped roaring, and the fan is spinning feebly. He is like a special trader who has just received a group of people. He is breathing hard just to prove that he can still breathe. At the same time, because of what he just said,
The fruits of his work make him proud.
Jiang Yuan looked at the fingerprint image on the screen, and there were already many more gaps that were enough to identify.
Jiang Yuan nodded with satisfaction. The image was not afraid of being blurry, but it was afraid that it would not have any pixels and would have to be filled in. In the criminal department images, it would be difficult to tell the truth from the false.
The pan-bottom image is simple, just process the pixels that can be processed, and the rest can be used.
Jiang Yuan tried his best to select more accurate image parts as supports, then made feature points, and then ran the software.
The first time, 100 fingerprints, no match.
The second time, Jiang Yuan re-selected the characteristic points and swiped 200 more fingerprints. When he saw the 47th one, he found a similar fingerprint.
The reason why they are similar rather than identical is because both fingerprints have been processed and there are not many feature points that match.
But this situation is the most common among difficult fingerprints.
It's the same reason. If the characteristic points can be easily matched, why send it to the provincial department and enter the fingerprint battle?
Here, the computer’s automated judgment takes a back seat.
The core competitiveness of fingerprint experts is always human judgment.
The current automatic fingerprint recognition system is ultimately a numerical system. It does not make image judgments, but makes numerical judgments by assigning values to images.
To put it bluntly, the automatic fingerprint recognition system recognizes endpoints and bifurcation points. It is effective in distinguishing most feature points, but some traditional feature points, such as small dots, small hooks, small crosses, and small bridges
, small eyes, dotted lines, etc., the automatic recognition system is incapable of distinguishing them.
In addition, things like the flow direction of the lines or the pattern of the lines are not very clear, let alone the automatic fingerprint recognition system.
In an environment like a fingerprint battle, Jiang Yuan did not need to worry about the computer's characteristic points. He made annotations according to the traditional Qingdao-style single-finger fingerprint analysis method, then right-clicked and selected "identify the same".
Ding dong.
In the office, notifications of new messages rang out again.
Li Zemin next to him subconsciously looked at Jiang Yuan next to him, and saw Jiang Yuan slowly opening a box of new Zhonghua.
