Chapter 183: This Trick is Useful

When Jiang Fujian received Jiang Yuan's message, he was drinking Duck Shit Fragrance Phoenix Dancong and scrolling through his phone.

Jiang Fujian replied "Okay" lightly and fell into deep thought.

"What are you thinking about?" Third Uncle sat opposite, took a sip of tea, teased the Huabo Xuetu dog at his feet, and by the way, moved Jiang Fujian's two dogs further away.

The Doberman was only a few months old, but its size had already surpassed his Huabo Xuetu dog. The two together had a feeling of daring to tease the uncle.

Jiang Fujian said "Humph," put down his phone, started making tea, and said: "Little Yuan is working overtime again."

"Working overtime again? Civil servants are so busy too." Third Uncle sipped his tea.

"He said there's a case." Jiang Fujian shook his head helplessly.

"It seems that the second-class merit is not easy to get. Others work 8 hours a day, and some go home in four or five hours. Jiang Yuan works 10 hours a day; if the second-class merit isn't given to him, who is it given to?"

Aunt Hua agreed: "Little Yuan is indeed too hard-working. Actually, it's better to let him come back and start a business, just open a company to help everyone find things..."

"It's helping you find things, right." Third Uncle couldn't help but say: "You bought a safe and want to lock it up, but it's open every day. What's the use of it."

Aunt Hua complained: "Opening the safe is very tiring, okay. That door is heavy as hell. It's fine when pushing, but when pulling, my legs have to rub against the ground, and I have to enter the password, look at the iris, and it often doesn't recognize it, so I just bought it as a file cabinet..."

"A-Hua, you have abalone there, I remember." Jiang Fujian asked.

"Right, I bought a lot of dried abalone back then. It's too troublesome to braise, and no one in my family eats it..."

"Give me some, I'll braise some abalone for Little Yuan to make up for it." Jiang Fujian stood up decisively.

Aunt Hua also stood up: "Right, Little Yuan doesn't have a partner yet, so hard-working, must make up for it well. I have dried scallops and Jinhua ham there, wait a moment, I'll find someone to push it over."

"Send a number to my WeChat later." Jiang Fujian raised his phone.

"Okay." Aunt Hua wasn't polite either and asked: "How much do you want to cook?"

"Cook a pot, take about four or five jin." Jiang Fujian said, starting to send messages, ordering old hens, ordering dragon bones and pork ribs, ordering chicken feet and pig trotters, etc.

Dried abalone is complicated to make. In addition to being careful when soaking, it is also labor-intensive, fire-intensive, and material-intensive when braising. For one jin of abalone, it takes about 10 jin of other materials to braise. The whole process takes a few days to get right.

However, Jiang Fujian estimated that Jiang Yuan would have to take a few days to get home, just in time to eat the braised abalone.

Criminal Police Brigade.

Jiang Yuan rubbed his waist, looked at the screen, and when he thought of something, he went up to mark and operate.

Most of the time, Jiang Yuan was thinking while looking at the fingerprint images.

The fingerprint is very small, but there are actually many points that need attention. Especially this kind of fingerprint with high incompleteness and a bit of blur, it is necessary to comprehensively consider based on the flow of the texture lines, the width of the fingerprint texture lines, the area where the feature points appear, and the number of feature points.

It should be said that the emergence of the automatic fingerprint comparison system has greatly reduced the workload of fingerprint comparison.

However, the dialogue with the automatic fingerprint comparison system has become a complex job.

Sometimes, even if you remove the dross and extract the most essential and real fingerprints, you still can't check it.

Because the fingerprints in the fingerprint library are not necessarily the most essential and real.

Sometimes, what you need to hit is impurities.

Therefore, the dialogue with the program is like a dialogue with people.

The initial communication and collision are all entangled in the same question: Are you essence or dross?

After identifying the other party's attributes, the correct way to communicate further or more deeply is to treat essence with the way of essence and treat dross with the way of dross.

After an afternoon and half a night of attempts, Jiang Yuan finally made a judgment:

You are dross.

He said it directly, facing the computer screen.

The bloody fingerprint on the screen was calm like an elite at this time, saying nothing.

"Let's talk tomorrow." Jiang Yuan pointed at the bloody fingerprint with his finger, then left the office and went straight to the dormitory to rest.

It was too late, and he was a little afraid to walk home alone.

He had seen too many cases recently. What if he encountered a killer released from prison, a retired killer, or a killer who killed to silence? Wouldn't that be terrible?

Especially on the night before this cold case murder was about to be solved, choosing to walk home alone at night, this is almost certain death in film and television works. Even if he doesn't die, he has to be injured and unconscious for a long time, and if he's unlucky, he has to show a sunny smile after being disabled.

Jiang Yuan returned to the dormitory, locked the door, and slept peacefully.

The next day.

The sun was bright.

Jiang Yuan deliberately slept until everyone went to work before getting up to wash, and then followed everyone back to the office.

Wu Jun arrived one after another with him, patted his shoulder when they met, and laughed: "I worshipped this hand before going out, to get you some good luck."

"Thank you, Master." Jiang Yuan thanked him.

"How is it doing? Is there hope?" Wu Jun was also an expert. He had seen many people who did fingerprints for a long time and couldn't do it. For Jiang Yuan, he also didn't want to increase the pressure.

Jiang Yuan nodded and said: "It's quite smooth."

He felt that if the rhythm today was good, there was hope to take down the fingerprint. This self-confidence was established by hitting it multiple times during the provincial fingerprint battle.

Of course, even if there is self-confidence, it is better not to say it out loud.

Jiang Yuan returned to his seat and silently adjusted the fingerprints.

The old high-performance host roared again.

This time, he treated the fingerprint with the mentality of treating impurities.

After some operations, when Jiang Yuan sent the query again, the target data category of the fingerprint was directly selected as the flat impression library, and the "rolling and flat", "rolling and flat and palm print" and other libraries were clicked off.

The so-called rolling refers to rolling impression, also known as three-sided impression.

Speaking of which, this is a relatively advanced way of impression, and the operation is quite complicated.

When impressing, the person being impressed needs to stand facing the impression table. The impressionist needs to stand on his left side, use his right thumb and index finger to pinch the sides of the second finger joint of the finger being impressed, and the other fingers and palms control the whole hand of the person being impressed, and then roll according to the direction of the thumb box inward and the other fingers outward, with the impressionist as the center...

In short, the person responsible for the impression is actually a specialized impressionist, usually, the police.

The advantage of doing this is that all the details of the finger can be reflected. Including the internal patterns of the finger texture lines, the outer line system, the root line system, the triangle, etc...

Theoretically, any part of the fingerprint left by this person in the future can be compared with the three-sided impression fingerprint.

Therefore, rolling impression is a great enrichment of the fingerprint library. Unless...

Unless the impressionist is unprofessional.

As everyone knows, people will do unprofessional things.

And this three-sided impression thing still has some difficulty.

Although with serious training, doing dozens of fingers, you can master its points.

However, as everyone knows, people will not be serious.

The fingerprints Jiang Yuan faced were too few, and the fault tolerance rate was very low.

By comparison, flat impression is simpler.

It is what normal people understand as pressing fingerprints.

The finger dipped in ink is pressed vertically onto the fingerprint card. Although the recorded fingerprint is not complete, all the fingerprints Jiang Yuan got now are within the range of flat impression.

Impurities against impurities, there is nothing to be embarrassed about.

Jiang Yuan re-adjusted the feature points of the fingerprint, selected only the flat impression library, and compared them.

After two rounds like this, by noon, when Jiang Yuan was re-drawing the feature points for the third round, the fingerprint ranked 12th made Jiang Yuan stop.

Jiang Yuan took a sip of tea, then enlarged the two fingerprint images and checked them one by one.

No doubt about the identification!

Sure enough, when selecting only the flat impression library, the comparison of fingerprints suddenly became easy.

Jiang Yuan breathed a sigh of relief.

Speaking of which, he did this fingerprint more difficult than during the fingerprint battle.

Because during the fingerprint battle, he borrowed the image enhancement skill, which was equivalent to a dimensionality reduction strike on the trace examiners of the previous generation.

This fingerprint comparison today had more or less some hard-hitting in it.

However, for cold case murders, where is there an easy one?

Jiang Yuan chose to submit it in the fingerprint library, and after a while, the feedback was sent back.

Same identification!

Jiang Yuan stood up and stretched, his bones crackled, he picked up his phone, and said to Wu Jun by the way: "It's hit."

"Eh, really?" Wu Jun was surprised.

Jiang Yuan nodded: "I'll call Brigade Captain Huang."

"Old Huang must be happy to death." Wu Jun said, then looked at his right hand, pondered, and thought: Is this trick so useful? ===== CHAPTER 184 =====