Ye Han was divided between two things. He had established a sect over there, and he had a handy software here. He input the pixels of the blurred screenshot and started to do high-order total variation based on the Euler-Lagrange equation...
…
The blurred image becomes clearer bit by bit.
Of course, the configuration of the police station cannot be very high-end, so the operation is slow. A rough estimate is that it will take at least dozens of minutes to an hour.
This is the result of him greatly optimizing the calculation process and reducing resource usage as much as possible.
If left to ordinary programmers, it is not impossible to spend hours or even days.
The technical department asked me to pick it up in one day, which was completely normal.
"Can you still do this?"
Although the previous operations could not be understood, and no one in the world could understand it except the system, starting from this paragraph, the black man Chris could understand it.
After all, he was in the technical department waiting for the results not once or twice.
This was the first time he had seen such a fast processing speed, and... he was using his own crappy computer!
The difference between computers is greater than the difference between people, and he knows this.
"Understand a little bit."
Ye Han pushed his eyes away and stared at the gradually becoming clearer images on the screen. His thoughts couldn't help but wander off again.
Why is the image blurry?
The resolution is not enough, the pixels are too low, the light is insufficient... of course there are many reasons.
But why can it be repaired?
Because high-order total variation can remove noise.
Here comes the key...noise, well, here it refers to image noise, what is it?
It is unnecessary or redundant interference information in image data. It is theoretically defined as "random error that is unpredictable and can only be understood using probabilistic and statistical methods."
Therefore, it is appropriate to regard it as a multi-dimensional random process, which can be described by using the probability distribution function and probability density distribution function.
But...is noise really multidimensional and random?
Before the emergence of chaos theory, it seemed that in the deterministic world dominated by Liouville's theorem and Laplace's demon, but after the emergence of chaos theory, we know that many, many, many noises are not actually random. Of course,
It is not pseudo-random by computer, but chaotic.
This is an inherent characteristic of nonlinear dynamic systems and a common phenomenon in nonlinear systems.
Maybe some students have to say, isn’t chaos just random?
of course not!
If so, how could Ye Han predict the folding structure of proteins based on chaos theory?
Chaos refers to the seemingly random irregular motion that occurs in a deterministic system. Note that it is only superficial.
Although it is chaotic, uncertain, unrepeatable, and unpredictable, it is just like weather predictions or stock market trends.
However, every chaotic phenomenon is described by a complete and definite equation, and there is no need to add any random factors. It is only because the system iteration is super sensitive to small changes in the initial value that it causes unpredictable phenomena in the later period.
For example, the thermal convection problem of weather, such as the logistic equation of population growth...
So initially, the term butterfly effect was used to describe it.
Well, actually it wasn’t a butterfly at first, but a seagull.
However, based on the first chaos model for weather prediction, the Lorentz attractor finally derived happened to form the shape of a butterfly in three-dimensional space. First the reporter called it so, and then even the author himself changed it. Over time...
Let’s digress further and return to the matter of blurred photos.
Obviously, part of the noise here can be refined into a chaos model.
And it is only a first-level chaotic system.
Although long-term prediction is impossible, it is possible to work backwards based on the phenomena that have already occurred and to eliminate noise interference based on the chaos model!
Moreover, the effect may be better and the calculation amount will be less, as long as an accurate description equation can be found!
It may be difficult for others, but for Ye Han, who can always find the one-dimensional continuous mapping of period three, that is, the Lie-York theorem, or Feigenbaum's two constants, or the Scharkovsky set of natural numbers, which are clues to chaos.
It's not that difficult, as long as he is willing to spend time and energy.
This topic is quite interesting!
Thinking of Ye Han, he immediately took action.
"Send us the photos from the same surveillance video at that time."
The more references there are, the easier it is to find patterns. Especially in the same environment, the same camera, and the same light and dark conditions, irrelevant variables can be minimized.
"Then……"
Then there was a slight but absolutely strenuous "click-click" sound from the hard drive, the screen turned blue and then black again, and the computer failed and restarted.
Skill reading failed.
I guess it's because he doesn't have enough mana and his intelligence isn't strong enough.
The picture has just been halfway processed, and the kidnapper's head in the picture has also been processed halfway.
"NO~~~" Chris wailed, and the black tenor's powerful and passionate trembling was all in it. The whole room was startled.
"Well, can you find a computer with higher configuration and faster computing speed?" Ye Han was not surprised and calmly stated his second request.
Even if he turned into a computer expert, he wouldn't be able to hold a calculator and press the program results, right?
"Yes! Yes!" Chris nodded, leading Ye Han to rush out the door.
Half of my head was blown out, and then it crashed...
It's like going in and suddenly being told that the price will increase. It's like taking off your pants and finding that there is no paper beside the toilet. It's like being addicted and unpacking and finding out it's milk powder...
Brother Black’s racial impulses are completely intolerable!
Chen Lu walked out from under the computer, looking at the two running backs and smiling proudly.
Men are all big hooves. If they don’t push hard at the critical moment, they will easily miss the point.
==========
Fourth Police Station, Technical Section.
There is a large wall of monitors at the entrance, many of which are showing scenes of explosions, car chases, gun battles... on the news wall. They are absolutely first-hand information and are bloody and thrilling without any mosaic.
But the graphics processing room is somewhere further inside.
Chris led Ye Han all the way to swipe the card to open the door, beating around the bush, and soon arrived at the end of the field.
An obviously young Chinese researcher was sitting in front of the computer and was busy when someone suddenly pressed his shoulder, picked him up, and put it aside.
"Sit down." Chris pressed Ye Han's button without any explanation, "This computer has just been replaced and it must be the best."
The young researcher didn't even have time to react before he was taken over by the magpie's nest dove. Then the black eagle that helped snatch it was still watching eagerly to prevent him from snatching it back.
|?ω?｀)
Besides touching the wall and being in a daze, what else can you do?
Ye Han didn't feel any guilt at all, and his emotional intelligence of 39 didn't support it.
After sitting down, I cut out the desktop and took a look at the system configuration.
UltraLAB graphics workstation, 4 Xeon, 4GPU, 48 memory 4×6 channels 6TBDDR4, 4 professional graphics cards, game cards, GPU supercomputing cards, 4TB SSD6Gbps interface hard drive...
It is indeed excellent!
Knowing it in his mind, he called up the program, entered the optimization algorithm, and everything started to go wrong.
100 neural reflexes, 101 intelligence... among the keyboard warriors, there is absolutely no one more abnormal than him.
In the blink of an eye, under the horrified eyes of the young researcher, he completed the input and started running the program.
The speed this time is completely different from before.
It's similar to high-precision printing, one centimeter in two to three seconds, but in just a few dozen seconds, the part that crashed and restarted was processed.
In just two or three minutes, the processing was completed. The image was still a little blurry, but much clearer and was displayed on the screen and in the printer.
Chris couldn't wait to grab the photo and rushed out the door.
At the same time, the system prompt sounded——
[The case of the missing boy on Jinshui Street, participation rate 3%, completion rate 3%.]