Is digital 3D the same as IMAX-3D? Friends who know, help.

1839, the British scientist Winterston discovered a wonderful phenomenon. The distance between human eyes is about 5 cm. When looking at any object, the angle of the eyes is different, that is, there are two perspectives. To prove this point is very simple, please raise your right hand and pose as "Amitabha", put your thumb near the tip of your nose and rest your four fingers on your eyebrows. Close your left eye and see that the back of your hand can't see your palm; Close your right eye. Just the opposite. This subtle angle difference is transmitted to the brain through the retina, which can distinguish the front and back distance of the scene, and then produce a strong three-dimensional sense. This is the secret of 3D-"polarization principle".

What is a 3D movie? D is the prefix of English Dimension, and 3D refers to three-dimensional space. Internationally, 3D movies are used to represent stereoscopic movies.

The reason why human vision can distinguish distance is because of the difference between two eyes. People's eyes are about 5 cm apart, and nothing will have the same angle except aiming straight ahead. Although the gap is very small, it is transmitted to the brain through the retina, and the brain uses this tiny gap to generate the depth of distance, thus creating a three-dimensional sense. Although one eye can see objects, it is not easy to tell the distance between them. According to this principle, if the same scene is made into two images by using the difference between the two eyes, and then each eye sees its own image on one side, the depth of field can be stereoscopic through the retina. Various three-dimensional demonstration technologies also use this principle, which we call "polarization principle".

There are many forms of making 3D movies, among which polarized glasses method is widely used. It uses human eyes to observe the scenery, uses two parallel movie cameras to represent people's left and right eyes respectively, and shoots two movie pictures with tiny horizontal parallax at the same time. During screening, two films are respectively loaded into the left and right film projectors, and two polarizers with polarization axes of 90 degrees are respectively installed in front of the projection lens. The two projectors need to run synchronously and project the picture onto the metal screen at the same time to form a double image of the left image and the right image. When the audience wears special polarized glasses, the polarization axes of the left and right polarizers are perpendicular to each other and consistent with those in front of the projection lens; The viewer's left eye can only see the left image, and the right eye can only see the right image. The left and right images are superimposed on the retina through binocular convergence function, and the brain nerve produces stereoscopic vision effect. Show a coherent three-dimensional picture, let the audience feel that the scenery is coming, or enter the deep recess of the picture, which can produce a strong sense of "being there".

What is 1.IMAX? A: IMAX is a image maximum developed by Canadian IMAX Group. Generally, a commercial 35 cm film has four perforations, and the film area of IMAX is ten times that of traditional 35 cm film, and the storage period is longer. IMAX film has high resolution, and the picture quality projected on the screen is particularly clear and natural. Even on a screen ten times larger than the screen that normally plays 35cm movies, perfect projection can still be presented, and vivid images without coarse graininess make the situation closer to reality. 2. Is 2.IMAX a 3D movie? A: In addition to general IMAX movies, IMAX later developed two new technologies, IMAX-3D and IMAX-DMR, so IMAX movies are not necessarily 3D movies. 3D movie design is the effect of transforming left and right eye images into 3D images through 3D glasses worn by the audience. Traditional 3D film technology stores the visual images of the left and right eyes on the same film at the same time, while IMAX 3D technology not only uses the world's largest IMAX negative, but also uses double films to record and play the images of the left and right eyes respectively, making the images more stereoscopic and clear, and the colors more vivid. 3. Where can I buy an IMAX machine? I want to buy a home theater, can I? A: The P3DGT IMAX projector is the highest-level equipment of IMAX. At present, only Thailand, China, Shanghai and Taiwan Province Province in Asia have the same level of equipment. This projector must keep the visual images of the left eye and the right eye synchronized at a high speed of 24 frames per second, so its stability far exceeds that of ordinary film projection equipment. In addition, because the projected image must be enlarged by 145000 times, the machine must also be kept clean and equipped with the most advanced temperature and humidity control equipment. This machine uses two high-brightness projection lamps of 15000 watts at the same time, which needs to be cooled by a special water cooling system. It is definitely not enough for ordinary cinemas to blow with an electric fan. 4. What's the difference between 4.IMAX commercial blockbusters and ordinary Hollywood commercial movies? A: Spider-Man 3 in IMAX Cinema is a so-called IMAX-DMR movie. IMAX Group has spent five years developing this digital remake technology to convert ordinary commercial films into IMAX format. First, scan each 35cm film at the highest possible resolution and convert it into a digital image. Then the image is sharpened and colorful by computer, which is converted into the world's largest negative format-IMAX. At the same time, this system will also convert the original sound effect of the film into IMAX surround sound effect with 7. 1 channel, and the power is 12000 watts. Compared with digital projection movies that also emphasize rich colors and sharp images, IMAX is not inferior at all.

In order to watch IMAX 3D images to the maximum, we must wear special stereoscopic glasses and transmit two images with slightly different angles to people's left and right eyes through the polarizing filter device, so that the images presented to the audience are very stereoscopic and lifelike. The spherical screen can be as long as 30 meters in diameter, and the vivid images are vividly displayed, and the great shock is earth-shattering. Since the first IMAX movie premiered at Osaka World Expo in 1970, more than 240 IMAX cinemas have been established around the world, receiving more than 700 million visitors. Among them, 60% of IMAX theaters are located in North America, and the remaining 40% are all over the world.

At present, there are more than 260 IMAX movies in the IMAX movie library, most of which are about environmental protection and popular science, mainly produced by some independent production companies in North America. These films are entertaining and take the audience to places where they can't set foot, and explore the eternal mysteries of various natural wonders, such as the Grand Canyon in the United States, the inner world of atoms, and unpredictable space. Since the successful transformation of Apollo 13 in 2002, the patented technology DMR of IMAX Company has transformed more and more Hollywood blockbusters into IMAX movies, showing great development potential.

IMAX, which originated from the English word "Image Maxium", is the best imaging system in the world at present. It combines the achievements of film technology, with the largest screen, the clearest image, the highest precision, the most powerful projection equipment and the most advanced six-channel multi-speaker sound system. IMAX is known as "the ultimate experience of movies" abroad, because when you watch IMAX movies, you are not only watching with your eyes, but conniving at your whole body's senses to deceive yourself-seven-story-high, 20-meter-wide super-large screen, crystal clear picture, extremely realistic six-channel and subwoofer, you will suddenly feel like a big beetle in Metamorphosis, and the boundary between reality and illusion is blurred: you and all kinds of huge ones. You are standing on the top of the snow-covered Antarctica, blowing the cold wind with penguins. You just dive into the deep blue sea, and a dolphin swims past your hand; You were walking in the Cretaceous virgin forest, and the dinosaur's claws almost licked your face. ...

Before May 2007, there were four IMAX cinemas in China. Except for the commercial IMAX hall of Shanghai Heping Cinema, the other three non-commercial IMAX cinemas are located in Shanghai Science and Technology Museum (2) and Harbin Science and Technology Museum (1) respectively. 65438+10.5, Canadian IMAX Company announced that it will cooperate with China and Hongkong Li Ji International Entertainment Company to build six IMAX cinemas in China in the next four years. In addition, many IMAX cinemas such as China National Film Museum and Dongguan Science and Technology Museum are under construction. It is estimated that there will be 22 IMAX cinemas in China before 2008. In fact, not only in China, but all over the world, because of the marriage with Hollywood blockbusters, "big screen" is becoming a trend.

After 20 10, 1 October1,there are 178 in the United States, 83 in other places and 1 1 in China.

1. Beijing Huaxing Cinema Shuang 'an Store (height 18m, width 26m, total area 468m2, seating capacity 387).

2. Beijing Shijingshan Wanda Cinema (height12.6m, width 210.3m, total area 268m2, seating capacity 433).

3. Changchun Wanda Eurasia Cinema (13.4m, height 2 1.8m, total area 292m2, seating capacity 556).

4. Changsha Wanda Cinema (16.5m, width 22.5m, total area 37 1 m2, 425 seats)

5. Tianjin China Film International Cinema (height 13m, width 2 1.5m, total area 279.5m, seating capacity 377).

6. Wuxi Great World Cinema (height10.6m, width 19. 1 m, with an area of 202 square meters and 378 seats).

(It is understood that the only set of digital IMAX image maximization system in Jiangsu Province, which costs 6.5438+0.5 million yuan, will be settled in Wuxi, and will be officially opened on 2065.438+0010.2. At that time, Wuxi citizens can watch China's first digital IMAX movie Avatar and enjoy the super audio-visual shock brought by IMAX movies. )

7. Kunming Broadway Studios (height 12m, width 2 1m, total area 252m2, 294 seats).

8. Wuhan Huan Yi Cinema (height 15m, width 22m, total area 330m2, seating 648).

Three movie halls—

9. Shanghai Peace Film Capital (height 15m, width 20m, total area 300m2, 358 seats).

10. china national film museum (height 2 1m, width 27m, total area 567m2, seating capacity 403)

1 1. Dongguan Wanda Cinema (22m, 28m wide, with a total area of 6 16m2 and seating capacity of 56 1).

If that's all, IMAX movies are probably no different from dynamic movies in the casino or globe movies in the planetarium. At most, it is just a pastime for tourists to satisfy their curiosity, and it is impossible to arouse people's long-term interest. The genius of IMAX lies in the digital deepening processing technology (DMR) developed by IMAX, which can convert ordinary 35mm film into IMAX version of 70mm film, so that Hollywood blockbusters can be moved to an unparalleled super-large screen without damaging their "crystal-like" image quality. Although this technology is just mature, only a few movies have been transformed, such as prequel trilogy, The Matrix, Spider-Man II and Harry Potter 3. And the conversion price is as high as $2 million, but it shows great development potential, making IMAX films shown in museums, science and technology museums, planetariums, aquariums, theme parks and other popular science education institutions for more than 30 years. James Cameron, the great director who is famous all over the world for filming Titanic, even issued a prosperous warning that "IMAX cinemas will gradually replace traditional cinemas in the next five or six years".