National Forensic Doctor

Medical Examiner's Office.

The pine trees outside the window were washed green by the rain, looking like a newly circumcised man, tender, moist and fleshy.

The little Chlorophytum in the window has grown a little bigger, and a few hanging leaves cover the cigarette butts in the flowerpot, and they look quite shiny.

Wu Jun and Jiang Yuan entered the office together. The first thing they did was open the window, stand in front of the spider plant, and said, "Smoke a cigarette."

Jiang Yuan's desk was facing the wind and was not affected. He said "yes" and turned on the software, waiting for comparison.

When he first acquired the skill of image enhancement, Jiang Yuan also tried to use it, but there was no suitable case and he never used it.

After copying the video he had just watched into his computer, Jiang Yuan went directly to the middle section and began to take a close-up of the robber's dagger.

Perhaps in order to intimidate the victim, the two robbers responsible for transporting the object would occasionally stretch out their knives and keep dangling them in the air. This gave Jiang Yuan a lot of choice.

Image enhancement technology, for now, mainly has two technical routes.

One is spatial domain image enhancement, which is the most direct and "natural" enhancement method. Simply put, it is to enhance pixels.

With more pixels on an image, the image will naturally be enhanced. The most commonly used is histogram processing, which can be understood as a method of automatically adding pixels based on probability theory. Of course, specifically speaking, it is technology related to grayscale histograms, grayscale point operations, histogram transformation, histogram uniformization and other concepts.

In addition, basic grayscale transformation, smoothing spatial filtering, sharpening spatial filtering, etc. are also technical solutions on the same level as histogram processing.

As for another technical solution, it is the frequency domain enhancement method, which is to treat the image as a two-dimensional signal and then transform the frequency domain to perform filtering and enhancement operations. It involves the famous Fourier transform, Walsh-Hadamard transform, Cosine transform, wavelet transform, etc.

When Jiang Yuan didn't understand these technologies, he regarded them as a sacred book. After he understood them and used them... computers were regarded as a sacred book.

For old office computers, I probably never thought about it, and ended up taking on everything myself.

It roared, howled, and trembled with all its strength. Under the impact of massive data and the bombardment of constantly changing technical means, the once arrogant atmosphere became weak, and the once clear screen became flickering. The cold body became hot.

"You need to add another computer here." Wang Zhong couldn't help but shook his head as he looked at the computer that went into a semi-crash state after showing some results.

"We can't buy new computers. I heard from Wei Yin that they have to sign several times to buy printing paper in the back office," Jiang Yuandao said.

"It will definitely be difficult to add new equipment, but as long as we can solve a few cases... Well, you and Wei Yin still have contact in private?" Wang Zhong found it unbelievable.

Jiang Yuan looked at him strangely and said, "I didn't contact him in private, just sent him via WeChat."

"You send WeChat messages privately?" Wang Zhong was shocked.

Jiang Yuan waved his hand: "It's just a chat occasionally. Can you add new equipment by solving a case?"

Wang Zhong was diverted by Jiang Yuan's words and said: "It depends on what you said. If you said, give me a new computer, I can solve three backlogged cases, Team Huang will definitely buy it for you... …

"It depends on three cases." Huang Qiangmin's voice came from the other side of the office.

Wang Zhong, who had his back to the office door, felt that his calves were numb. He turned around with difficulty and whispered: "Captain Huang, I just... I thought..."

"It's okay, as long as the case is solved, I don't care." Huang Qiangmin's smile turned to 4 degrees, like a cute little crocodile, he tilted his head and looked at Wang Zhong, and asked: "But, at least, It’s three serious cases.”

"Yes...that's what I mean..." Wang Zhong smiled as if he had just been fucked by a beautiful woman. He didn't know whether to laugh or cry.

"Is there any progress in the case?" Huang Qiangmin looked at Jiang Yuan again, and the smile at the corner of his mouth automatically rose to 6 degrees.

He used to never come to the fourth floor where the Criminal Division Squadron was located. It's just an auxiliary squadron. For the captain of the criminal police brigade, he has too many squadrons and businesses to care about. Even if the police dog squadron is strong, the captain will go and take a look from time to time.

After Jiang Yuan arrived, Huang Qiangmin's attitude changed obviously.

For Huang Qiangmin, a person who can directly solve the case is a different existence.

The reason why the second squadron and the first squadron are valued more is simply because they can solve cases, big cases, and tackle tough problems!

Now, Jiang Yuan can also solve cases, major cases, and tackle difficult problems, so Huang Qiangmin will naturally come to see him from time to time. Units like the Criminal Police Brigade actually offer very few material rewards, and are not suitable for using material rewards to win over people. This is something Huang Qiangmin understood a long time ago.

Otherwise, if you really want to fight for money and income, there are still outsourcing companies that specialize in doing fingerprints in the society. Awesome fingerprint experts who want to make money can join in, bill directly by the piece, and easily make millions a year.

Therefore, Huang Qiangmin now pays more attention to the mental aspect and gives Jiang Yuan a massage.

"I'm running, I can't get out." Jiang Yuan babbled, pointing to the computer with a blurry screen and soaring heat.

Wu Jun said from the sidelines: "It's been half an hour. It's been so noisy that my ears can no longer function."

Huang Qiangmin asked: "What exactly does this do?"

"Image enhancement. The copied surveillance video is not clear enough. I want to see the details of this knife. I think if the pattern on the handle of the knife is clearer, I might be able to search for similar pictures. Maybe. We can find the source of the hilt." Jiang Yuan opened the phone, enlarged the image inside, and showed it to Huang Qiangmin.

Huang Qiangmin understood, and his eyes changed again without realizing it.

Not to mention whether the case can be solved, he is also extremely interested in image enhancement.

"Where did you learn image enhancement?" Huang Qiangmin was half curious and half happy.

"I just learned it casually in school." Jiang Yuan answered reluctantly.

Of course, Huang Qiangmin could only believe it, and he sighed with emotion: "The young people today are amazing. When we recruit new people this year, I have to take a closer look... How long will it take?"

"It's almost done." Jiang Yuan pointed at the progress bar, which was already 99%.

10 minutes later.

The progress bar is all red and a picture is displayed.

On the handle of the knife, there is clearly a row of distinctive dark flowers. The flower stems are wrapped around each other and stretch out eight claws.

"Let me search." Jiang Yuan said, opening Baidu and pulling in the picture.