civil forensic

Chapter 85 Core
In the office, it was calm again, like a study room. Occasionally, someone showed Bonn's love, which seemed to attract everyone's attention, but after the incident disappeared, everyone would 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 the fingerprints that suit him.

He deliberately looked for fingerprints that were fuzzy and in poor condition for comparison.

Because compared to ordinary trace inspection, he can also use "image enhancement technology (LV3)" to process fingerprint images.

In fact, the current automatic fingerprint identification system also needs to process images.Operations such as thinning and denoising, ridge segmentation, and ridge extraction are all automatically completed in the background of the computer, and trace inspectors do not need to worry too much.

But with the current level of technology, it is impossible for an automated fingerprint automatic identification system to surpass the manual level of a master.

Jiang Yuan directly pulled out the posture of monitoring and made a fingerprint image. After only a while, he selected a blurry picture that looked like the bottom of a pot.

Jiang Yuan's computer host became restless because of this.

ooh ooh...

The mainframe that Jiang Yuan is using now has a fairly good configuration, and it is a new computer purchased centrally by the provincial department.But after it was assigned to the trace inspection post, for more than two years, it has hardly worked hard on the graphics card and CPU.

And at Jiang Yuan's request, its fan started spinning crazily, making a sound like: Why am I so hot?I am really scared.

Jiang Yuan got up, shook the Zhonghua in his hand to Li Zemin next to him, and invited, "Go outside for a cigarette?"

Li Zemin also felt that Jiang Yuan's machine was noisy, and wanted to smoke more, so he immediately followed Jiang Yuan's footsteps.

The two left the office, gave each other a cigarette, and began to puff.

Jiang Yuan only smoked a cigarette, holding it between his hands most of the time, and then stared blankly at the front.

Li Zemin didn't care so much, he sighed in satisfaction after smoking one, smoked another, and asked, "Why is your computer so loud?"

Jiang Yuandao: "I'm doing image processing. Will it be too noisy?"

Li Zemin understood a little, so he couldn't help looking at Jiang Yuan, and said, "The processing of fingerprints is so loud, then your technology is a bit powerful."

"Well, I will do image enhancement like surveillance video, and try it on fingerprints. I don't know if it will work."

"If it works, let someone find a separate place for you, or find a separate place to process the image." Li Zemin said with emotion: "You young people are amazing, unlike us, who were exhausted when they learned fingerprints back then. ...By the way, how far can your technology make images?"

"It's also hard to say. What's vague will become clearer, but it's targeted." Jiang Yuan didn't make it very clear, because he didn't really experience it himself.

In general, image enhancement technology is still a bit overkill when used on fingerprints.

Whether it is suitable, he himself is not clear.

However, one thing is 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 for not being able to compare?
If the reason for failing to compare is the matching problem, then it is useless to do well with your own feature points.

If the incompleteness of the fingerprint is too high, then others will not be able to compare it, and it is very likely that you will not be able to compare it either.

Because of this, some fingerprint experts proposed that the strategy in the fingerprint battle is "don't do what is clear, don't do what is too vague, and try again if you don't take it lightly."

It sounds very simple, it seems to be a strategy of spinning around on your own, but after careful consideration, it is actually a very valuable strategy.

In this case, encountering too clear fingerprints is actually worthless.Too fuzzy fingerprints, too.

Only moderate fingerprints are the focus of the work of many fingerprint experts.However, considering that so many fingerprint experts are staring at these unimportant fingerprints, the key point has become a difficult point.

Jiang Yuan's ability to deal with blurred images has become unique because of this.

Back in the office, Jiang Yuan's computer had stopped roaring, and the fan was turning weakly, like a special trader who had just received a group of people, just to prove that he could still breathe, and at the same time, because of the It is proud of the fruitful fruits of its work.

Jiang Yuan looked at the fingerprint image on the screen, and there were many more grooves that could be identified.

Jiang Yuan nodded in satisfaction. The image is not afraid of being blurred, but it is afraid that there will be no pixels and all must be filled. In the criminal department's video, it will be difficult to distinguish between true and false.

The image of the bottom of the pot is simple, and the pixels that can be processed by the processing are processed, and the rest are all usable.

Jiang Yuan tried his best to choose the more accurate part of the image as the support, then make the feature points, and then run the software.

For the first time, 100 fingerprints were not matched.

The second time, Jiang Yuan re-selected the feature points, re-scanned 200 fingerprints, and when he saw the 47th, he found a similar fingerprint.

Similar rather than identical, because both fingerprints have been processed, and there are not many places where the feature points match.

But this situation is the most common in difficult fingerprints.

The reason is still the same, if the feature points can be easily matched, why send it to the provincial department and enter the fingerprint battle.

Here, the computer's automated judgment has taken a backseat.

The core competitiveness of fingerprint experts is always human judgment.

The current automatic fingerprint identification system is, in the final analysis, a numerical system. What it does is not to judge images, but to make numerical judgments by assigning values ​​to images.

To put it bluntly, the automatic fingerprint recognition system recognizes endpoints and bifurcation points. It is effective for most feature points, but some traditional feature points, such as small dots, small hooks, small forks, and small bridges , small eyes, dotted lines, etc., the automatic recognition system has no resolution.

In addition, such as the flow direction of the lines, or the pattern of the lines, it is not very clear, let alone the automatic fingerprint identification system.

In the environment of the fingerprint battle, Jiang Yuan didn't have to worry about the characteristic points of the computer, so he marked it according to the traditional Qingdao-style single-fingerprint analysis method, and then right-clicked and selected "identify".

Ding dong.

In the office, notifications for new news rang again.

Li Zemin next to him subconsciously looked at Jiang Yuan next to him, and saw that Jiang Yuan was slowly unpacking a new box of Zhonghua.

　The next chapter will be V, it should be updated in the early morning.I'm going to play at a young age, I hope I can make two more cuts on the field, and I hope all readers will support me.Please subscribe!Ask for a monthly pass!

　　
　
(End of this chapter)