What is four-dimensional photography?

The definition of two dimensions on a plane is two dimensions.

Two dimensions are left and right, up and down, without front and back. The content on a piece of paper can be regarded as two-dimensional.

That is to say, there is only area, not three-dimensional.

Two-dimensional is a kind of plane technology, such as ordinary plane animation, which is called two-dimensional animation. Three-dimensional is three-dimensional.

Three-dimensional three-dimensional refers to a space system formed by adding a direction vector to the maintenance of plane two.

The so-called three dimensions, according to the popular theory, are only artificially designated and staggered three directions (vertical is a very characteristic understanding). With this three-dimensional coordinate, it seems that the position of any point in the whole world can be determined. It turns out that the three-dimensional position is determined.

Stereo is not only the three axes of the coordinate axis, that is, the X axis, the Y axis and the Z axis, where X represents the left and right space, Y represents the upper and lower space, and Z represents the front and rear space, thus forming a three-dimensional sense of human vision. Three-dimensional animation is a three-dimensional animation made by three-dimensional production software, which has realized the trend of further development.

The so-called three-dimensional space refers to the space we live in, which can be understood as up and down. If time exists in the form of matter, plus time, it will be a four-dimensional space. But it is not difficult to understand that you can go back to the past at will in time, but understand that "just now" and "now" are different physical beings, but you can't go back to "just now" and "past".

Three-dimensional is composed of two dimensions, that is, only two directions are staggered, and a two-dimensional and a one-dimensional are superimposed to get three-dimensional.

Three-dimensional is three-dimensional, but what we often say is only relative to the observation angle. There is no absolute front, back, left, right, up and down.

Three-dimensional technology is mainly used in animation industry. In China, three-dimensional animation mainly includes Exploring the Global Village (said to be the first three-dimensional animation of China) and Mobius Ring.

2D is 2D, 3D is 3D, and 4D is 3D. According to Einstein's theory, the concept of time was added. So the combination of time and space becomes the so-called 4D space.

IMAX (the abbreviation of image MAXimum, meaning "maximum image", which can be pronounced as "love max" in Chinese) is a film projection system with larger and higher resolution than traditional film. The whole system includes film copying, projector, sound system, screen and so on. IMAX specification shooting. The standard IMAX screen is 22 meters wide and 16 meters high, but it can be played on a larger screen, so far there are more IMAX screens. In order to greatly improve the resolution of the image, IMAX film is shot with a special 65 mm negative and its special camera, and then developed into 70 mm film. The image size of traditional 70mm film is 48.5mm× 22. 1mm, while the image size of IMAX film is 69.6mm× 48.5mm, that is, the format of "15/70"-each frame of film. Therefore, the photosensitive area of IMAX film per frame is 10 times that of ordinary 35mm film and 3 times that of traditional 70mm film. This determines that the image projected on the "giant screen" is clearer and brighter than ordinary movies. The copy of this film is so heavy that it needs special lifting equipment or the strength of many people to move it when it is shown. Because the size of IMAX film is much larger than that of ordinary film, the film feeding speed of IMAX film is also three times that of ordinary film, and one frame is shown every 6 milliseconds. The film length shown once every1.7m, and every minute102.6m.. Therefore, the length of a two-hour IMAX movie is 12. 48632 . 6868686866 1

Because the traditional 70mm film is unstable after being magnified more than 500 times (that is, full screen), IMAX specially adopts the "rolling ring" technology to show the film, increases the compressed air device to speed up the film transmission, and places a cylindrical lens at the front end of the projector to keep a vacuum state during the show. The IMAX projector is fixed with screws, and the projector is fixed in a completely horizontal state by four screws and gears. IMAX projection system also offsets slight jitter during projection by adding cam control arm, and its shutter length is about 20% longer than that of traditional equipment. The light bulb of the projector is amazing. The light emitted by the IMAX projector with the maximum power (15 kW) can be seen even on the moon. Therefore, IMAX projection system is expensive, and its weight exceeds 1.8 tons.

IMAX projectors have the highest precision and the strongest power, reaching an unprecedented advanced level. The key to the reliability and stability of its operation is the unique "rolling L00P" film feeding technology. This technique is to make the film run horizontally like a wave. In the process of screening, each frame is firmly attached to the back of the lens through a vacuum device, so that the stability of the picture greatly exceeds any conventional standard, and the image is crystal clear. IMAX projector 15kW light box is so powerful that naked eyes can see the light spot it emits on the moon.

An important factor of IMAX experience is its sound. IMAX six-channel super sound system includes subwoofer channel. Sonics sound source equalization speaker system specially designed for IMAX cinema means that the volume and sound quality of every place in the cinema are exactly the same, and the audience can enjoy the same quality sound effect no matter where they sit. There are thousands of holes on the screen in order to make the sound spread unimpeded. At the same time, the seat design with large slope gives every audience an unobstructed view.

The structure of IMAX cinema is also very different from that of ordinary cinema. According to different shapes, IMAX screens are divided into rectangular screens and spherical screens. The standard IMAX screen size mentioned above refers to a rectangular screen, while the diameter of a spherical screen can reach 30 meters. The spherical screen mainly shows OmniMax (IMax Dome, formerly known as OmniMax). This kind of film is shot with a "fisheye" lens, so that the scene of 180 degree can be imaged on a flat film. Another fisheye lens can be used to make the panorama reappear on the screen.

Due to the high resolution of IMAX images, the audience can be closer to the screen, and generally all seats are within the height of one screen (while the seat span of ordinary traditional cinemas can reach 8~ 12 screens). Moreover, the inclination of the seats is larger than that of ordinary cinemas (the projection hall of the spherical screen has an inclination of 23 degrees), so that the audience can better face the center of the screen.

IMAX3D is the projection technology of IMAX stereoscopic movies. IMAX3D uses two sets of IMAX-specific 15/70 films, one for each eye, and provides two independent images through polarized filter glasses or infrared synchronization system with electronic glasses. Combined with IMAX giant screen, IMAX3D can produce realistic full-field stereoscopic effect. IMAX image maximum