"The coffee is good." Liu Jinghui took another cup of coffee, drank it all, and then went back to verify the timeline.

Wei Shi saw that he turned a blind eye to the outside world, then turned to see Jiang Yuan thinking in front of the computer, and shook his hands again to make coffee.

"Teacher." Jiang Yuan suddenly raised his head and shouted.

"Ah! Master." Wei Shi immediately stepped forward.

Jiang Yuan looked at the Wei Shi and said, "I have read the exercises you have done recently, and I have made progress."

"Ah... it was taught by the master." Wei Shihua thanked himself and his senior sister for their day and nights.

"I just did the image enhancement step. Have you seen it?" Jiang Yuan asked again.

"That's still a little bit." Wei Shixiu said and laughed awkwardly, saying, "The steps are quite complicated, I may have to learn for a while."

"You can try it." Jiang Yuan said and signaled the guard to sit next to him.

A sensible local technician immediately moved a set of computers and monitors to the next door to the guards.

Before Shi Wei could object, the computer screen in front of him lit up.

He looked at Jiang Yuan on the left and then at the screen in front of him, and it felt a bit like taking an exam next to the teacher.

"If you can't continue, just say that you can choose more directions and try it without having to do it in one direction." Jiang Yuan said and checked the software on the computer, and then threw a few groups of videos for him.

Wei Shiqi Ai Ai said, "I have not made much progress in mathematics..."

"You can use it by knowing how to use software. Can you upgrade it? Let's see your talent later." Jiang Yuan waved his hand and signaled the guard to go into battle.

Wei Shi nodded with difficulty, like a sensible golden monkey, carefully opening a original video, making a backup first, and hash value verification.

Then, after determining the video format, Weishi began to preprocess the video, first using Neat-Video for noise reduction, try to remove particulate noise or compression artifacts, and then do multiple frames to average time domain noise reduction, Gaussian filtering and median filtering to reduce noise reduction in airspace. During this period, although the software is working, just filling in various values ​​makes Weishishi's brain a little overloaded.

He peeked at Jiang Yuan and saw that when Jiang Yuan scanned the surveillance video, he encountered any problems. The software was called out in the middle and it was just a few times. Many values ​​were modified rapidly.

Those who don’t know how to behave may think that Jiang Yuan is a skilled worker, but only Master Wei knows that Jiang Yuan is a skilled calculation state.

Just like ordinary people know that sin45 degrees is equal to two of the root number two, which is about 707, the standard deviation of Gaussian noise is common in low-light monitoring, but when the edge is preserved, the value can be 0, or double-sided filtering is used instead. However, in many cases, the GaussianBlur function needs to be borrowed and calculated based on the kernel size...

Compared to before, Wei Shi has understood a lot of principles, but Gaussian noise is just a small step in the pre-step...

A few hours passed in a flash.

During the break, Jiang Yuan remembered Wei Shi, so he walked over like a school teacher and saw two computer screens in front of Wei Shi Shi. The screen was lit, the cursor flashed, Wei Shi Shi Shi's eyes were open, that's all.

"Have you encountered a bottleneck?" Jiang Yuan asked Wenyan.

Since I have taken over the task of the second generation, I still have to continue.

Wei Shi looked up at Jiang Yuan in a daze, shook again, and said, "There are so many bottlenecks."

"Where did it..." Jiang Yuan was not in a hurry. He himself was cheating, so he knew the difficulty of image detection. This thing is a technique that would be abnormal if a normal person touched it. Fortunately, the guard is not very normal.

Wei Shi looked up embarrassedly: "I want to remove the motion blur, I want to use Wiener filter, but it's a mess..."

"Then let's convolutionize the blind spots, use focuagic, I will teach you how to adjust it." Jiang Yuan stood behind Master Wei and gave him a little bit of teaching.

Several Malaysian technicians stood in front of him, widening their eyes and listening. Zhong Renlong also did his best to translate, but he was just facing a long list of professional nouns and numbers, and his voice became smaller and smaller.

"I've finished it here." Liu Jinghui's eyes turned red when he drank coffee and walked over.

"Can the suspect be confirmed?" Jiang Yuan left the guards.

"At present, there are four people who have no evidence of absenteeism. Or the evidence of absenteeism is incomplete. Of course, I am stuck with it more strictly." Liu Jinghui paused, then looked at Jiang Yuan, and said, "I am based on the death time of the three deceased, and it is accurate to within 4 hours."

"No problem within 4 hours." Jiang Yuan nodded.

Jiang Yuan used temporary +1 to judge the death time given by the temporary LV7 death time. In theory, this time interval can be reduced, but if we want to judge the suspect based on this, Jiang Yuan still expects the enemy to be lenient.

Liu Jinghui nodded: "Although there are three murders, the murderer's time to commit crimes is rest time, two are daytime and one is night. In this case at night, there is very little room for screening. The remaining two daytime cases have helped screen most people."

Liu Jinghui then showed his achievements and Wang Chuanxing on the projection screen PPT.

After the gorgeous opening animation, their timelines are embellished after each name.

In the three cases, the timeline of each person on the day, especially the total 4-hour timeline before and after the victim's death, was sorted out in detail.

Liu Jinghui pointed at the laser pointer and said, "From the timeline, the murderer killed people three times, but it has been escalated. For example, in the third case, the murder time, place of murder, and monitoring chosen by the murderer have no effect at all."

Liu Jinghui: "The last four people I selected were actually more than expected. I thought that 23 people would be roughly screened. Even if the conditions for our screening were relaxed, we could meet the time for committing three cases at the same time, and there might be only one or two people. I was even prepared for none of them. At that time, we had to consider the possibility of people outside committing crimes."

Liu Jinghui: "But from the results, half of the people are mainly technicians. Most of the time they work independently and are not under monitoring. For example, those who install shade nets, those who do mechanics, and those who also work in trimming and planting. Not only do they work most of the time outside, they don't even go back to have lunch at noon, which also gives the murderer an opportunity to take advantage of it."

Liu Jinghui: "In short, the last four people are production manager Li Wanzhong, mechanic Zhang Fan, He Jun, and general worker He Cheng."

Following his words, Wang Chuanxing unfolded the four people's form.

Liu Jinghui coughed twice and said, "In this case, Li Wanzhong is the employee who works the longest in the rubber plantation and is also the oldest at present. As one of the heads of the rubber plantation, Li Wanzhong has a good workload every day and has to spend most of his time in the office area. When the two murders occurred, Li Wanzhong did not have any evidence of being absent, which is also a skeptical factor..."

"Wait a minute!" Ni checked his phone and suddenly interrupted Liu Jinghui's words.

Several people looked over.
Chapter completed!