Coquettish Rebirth

After Jia Hongjian told the Nikon people his specific requirements, they developed a software that could control dozens or even hundreds of digital cameras with a single laptop within two hours. It was Jia Hongjian who said that this thing is not difficult, that is, to package a small software, this small software can obtain the time from an accurate clock software after a person presses the "start button", and then about every thousand A fraction of a second sends out an electrical pulse to activate different digital camera shutters.Such an original version of the software is quite simple to develop, but this is just a verification of the principle.To provide it to Jia Hongjian and Cheng Long for testing, it needs more precise software instead of manual control!

why?In other words, the shot to be shot is Cheng Long jumping up from the edge of the US embassy, ​​leaping seven or eight meters in the air, and then falling into someone's attic hut.So when is the right time for the bullet time in the middle?Generally speaking, the effect is best when the whole person flies to the middle of the two buildings!But one thing to know is that after a person runs at a speed similar to 0.01 meters or the speed of the Olympic run-up long jump, and then leaps into the air, the time to fly seven or eight meters is very short!It could be as short as a second!As for the middle point, although the requirement is not accurate to the centimeter, it does not mean that it must be taken when the middle point cannot exceed 0.5 meters, but there is also an approximate position requirement!When Cheng Long flies to this position, it may be 0.4 seconds in the air for a second.If it is controlled by human hands, can it really accurately point to the range between 0.6-[-] seconds?

This is not about playing games, not about trying again ten or eight times if you don’t get it!This is about human life!If you fail once and fail to catch, Cheng Long will try his best to jump again!What if Cheng Long danced perfectly this time, but the person controlling the machine trembled nervously and pressed it ahead of time, then Cheng Long would do it a second time later, but fell down and was seriously injured. This person blames himself but not himself. ?This is equivalent to Cheng Long being seriously injured by him!So this kind of thing that can be handed over to the machine for precise positioning, then try not to hand it over to humans.After all, something happened to the machine.Cheng Long wouldn't say anything either.But if a younger brother under him presses the wrong button several times in a row, is it possible to say that Cheng Long doesn't scold his mother in his heart?

So after Jia Hongjian considered this situation in advance, he discussed it with Nikon's engineers and technicians.And discuss the results after a few hours.Everyone unanimously expressed the need to choose a laser positioning system!What is a laser positioning system?It sounds like a very high-end look.In fact, it is not very high-end-it can be understood that the laptop computer that controls the digital camera is connected to the outside of the wire.At the end of each line, connect a 10 yuan laser pointer that a child plays with, and then install a receiver at the position opposite the beam of the laser pointer.What about this receiver.It is equal to a NOT gate - that is to say, when the input is a signal of 1, it outputs 0, and when the input is 0, it inputs 1, which is a small switch.In this way, when the receiver receives laser radiation, the system does not respond, and the receiver will send out a signal if it cannot receive laser light!Ever since, when a part of Cheng Long's body touched the laser in the air and blocked the laser, then the receiver sent a signal to the notebook, and the notebook would automatically press "Start" after receiving it, and then send out a pulse signal to each A different digital camera, and each different digital camera will start taking pictures!

Before Cheng Long arrived in Japan, Jia Hongjian and Nikon's engineers got a few machines to try first, and then after debugging, they found that the system was working quite normally.At least the delay does not exceed 0.1 seconds!So in theory, as long as the machine doesn't crash or the program doesn't crash, then when Cheng Long is jumping, the machine will automatically control the digital camera to shoot!

In the afternoon after the system was tested, Cheng Long came to Japan, and besides the members of Cheng Jiaban, there were also Pixar and DreamWorks special effects teams led by Spielberg who came to Japan with him.These two teams can be said to be the most capable of special effects in Jia Hongjian's hands, and they are also considered to be the world's first-class team. Although it may not be possible to say that they are as good as Industrial Light and Magic, but fortunately, Cheng Long's film is not about shooting any Star Wars, not about shooting an all-illusion background, or some sci-fi background, so there is not much pressure on these two teams.

After Cheng Long arrived here, he was ready to start experimenting with Jia Hongjian.First, under the arrangement of Nikon, they borrowed a half-empty warehouse of Nikon as a test site to test whether the shooting method Jia Hongjian came up with worked well.It is very simple to test, that is, first make a nearly circular steel pipe, and then weld the joint and bracket on the steel pipe, so that this incomplete ring can be guaranteed to be in such a position on Cheng Long's face.Then, it is necessary to install about 12 machines on such a circle - because this is just to test whether the principle works well, so the circle is not big, and the machines used are naturally less.

This test is also very simple. First, a camera is set up behind Cheng Long's back, and the process of Cheng Long walking forward is normally filmed.And Cheng Long walked facing the ring, and after two or three meters, he would enter the range of the ring, and then stop when he was almost close to the camera, which was a total of three or four seconds.In the previous two or three seconds, the camera was shooting Cheng Long's back, and in the last second or so after Cheng Long entered the circle, the machine would crackle and start shooting.This machine will automatically take n pictures, and finally choose the one with the best effect, and then see how it looks.

Of course, this is also a feasibility test, without adding too many variables, the completion should be very smooth.The result was the same, Cheng Long walked away without any pressure, and then succeeded in an instant.This success simply made Cheng Long himself have no sense of accomplishment, not to mention him, even Jia Hongjian has no sense of accomplishment!On the other hand, one of the key reasons why everyone has no sense of accomplishment is that.At this time, everyone should start to prepare to face the variables!what variable?It's easy!After the expansion of this system, it is impossible to get too close to Cheng Long after the system is installed in the air between the American embassy and the embassy residence, right?When the time comes too close, don't say that the camera behind him caught it, maybe even Cheng Long jumped crookedly and hit the shelf!Therefore, the shelf must be large, and there must be a distance, so at this time, the position of the machine shooting, or the center.That's where the camera is aimed!

Notice.This lens does not automatically follow people to shoot!Instead, after the angle is set, the camera will shoot automatically. At most, it will automatically focus on the machine, but the automatic focus also depends on the motor, which also takes time.In order not to waste this time.Reduce variables.The machine has focused on a similar position in advance!So when Cheng Long jumps in the air, can he guarantee that he will jump to this position completely and completely?Or to put it more simply, if you, Cheng Long, jumped tens of centimeters lower.Although Cheng Long may barely complete the stunt in the end, all the busts of Cheng Long captured by our machine, so how the hell do you do bullet time?People's bullet time is all over the body, okay?At that time, half of Cheng Long's body will be outside the bottom of the screen, and only his upper body will be photographed in 360 degrees. Is this interesting to the audience?

However, this Cheng Long is not a machine, he has to rush at a speed of [-] meters, and he must be careful to jump into the attic window on the opposite side, which is dangerous enough in itself, and now he insists that he is in mid-air s position?There are so many conditions, how many times are you going to let people dance repeatedly? Hey!Is this murder?

Therefore, after a brief discussion and discussion of various possible scenarios on the scene, Jia Hongjian and Cheng Long proposed a compensation measure, which is to prepare redundancy!In other words, it is not enough for one ring to aim at one height. We need to make more rings three-dimensionally, so that we can have photos of various heights in one jump, so that we can try to pick the most suitable one from a set. for special effects, right?In this way, Cheng Long doesn't have to jump many times, right?

So, at the end of the day, the designed stuff is no longer a circle surrounded by 60 digital cameras!It is a total of four circles, a total of 240 Nikon d1 digital cameras with lenses, lasers, and receivers in a circle!Such a four-circle space, in fact, was at least three meters above Cheng Long's head when shooting, not to mention the horizontal distance!Then through zooming in on the lens, it is possible to properly take photos of Cheng Long at various heights in the air!In this way, basically through a trial and calculation, as long as Cheng Long can successfully jump to the opposite side, then basically he can take a suitable photo!In this way, Cheng Long's safety was guaranteed to the greatest extent!

In order to test whether this stuff is easy to use, Nikon still asked the engineers to take out 240 D1 digital cameras, and then remodeled it on the spot, made the rings of real size on the spot, welded various interfaces on the spot, and then assembled the things. After that, they even imitated the photos taken by Jia Hongjian and Cheng Long and the data they recorded, and simply imitated the roofs on both sides on the warehouse floor!

Then Cheng Long jumped about ten times realistically, deliberately choosing different take-off points, heights and speeds, to test whether the system can really capture the whole picture!The result is not disappointing, unless it is obvious that you will fall downstairs a few times, you can basically guarantee that at least one person can be photographed!

That sounds like trouble enough, right?The foot test is here, it's almost over, isn't it?It's finally time to start filming, right?actually not!The photos taken during the on-site test here do not mean that they will be deleted after they are taken!Instead, after they were collected, they were handed over to the special effects teams of Pixar and DreamWorks who came with Cheng Long!They still have to try to see how to insert the digital photos into frames successfully!How to make these photos into a slow motion shot!These things also need to be done from the beginning!

Although they have a non-linear editing system, there is no supplementary frame function in these systems!This kind of supplementary frame function, to be exaggerated, is equivalent to saying that a person is walking, and the left foot and the right foot are photographed. How to use the computer system to supplement the middle kick, put the foot and swing the arm? What about the gradual changes in the lifting and lowering of the body's center of gravity, and even hair, clothing swings, etc.?There is only one starting point and one end point, how can an intermediate state be created out of thin air?This is not to say that nonlinear modification can be modified casually!In this era, there are no digital cameras, and the digital camera is still facing the problem of being unable to open the professional market. How can there be such advanced technology to invent and supplement the frame rate!Nowadays, the special effects in Hollywood are all performed by real people, so there is no need to supplement the number of frames of real people!

Hollywood special effects are more about various sci-fi or fantasy scenes, such as various dinosaurs, spaceships, monsters, or various robot body deformations, etc. These are similar to making CG animations, yes It is directly generated frame by frame, which is modeled inside the computer. This is completely different from the difficulty of creating an intermediate state between the two real things out of thin air! (To be continued..)