What's the difference between IMAX hall and 4K giant screen hall in cinema?

First of all, developers are different:

1. The usual IMAX screen was developed by IMAX Group of Canada. The standard screen size is 22 meters wide and 16 meters high, but it can be played on a larger screen. So far, there are more IMAX screens, as shown in figure 1.

Legend 1:

2. However, DMAX is independently developed in China, and the giant screen of DMAX is jointly developed by China Film Science and Technology Research Institute and China Film Co., Ltd. Although it is not as big as IMAX, it is much larger than the ordinary screen, as shown in Figure 2.

Second, the picture quality is different:

1. Compared with IMAX, Chinese giant screen DMAX has lower cost and higher brightness. China's giant screen DMAX adopts high-brightness dual-camera projection, and the screen brightness is improved by nearly 20% compared with IMAX. Even in the case that the overall tone of the 3D movie screen is dark or there is a night scene, it has a good performance. However, the DMAX dual-camera projection device is still a 2K machine. Although it will be upgraded to 4K, the resolution of real IMAX movies is above 6K, and the picture quality is obviously different.

2.IMAX scans and prints ordinary 35mm film onto 70mm film by exclusive technology through digital original copy conversion technology, and the upgraded picture is absolutely high in fineness and quality. DMAX dual camera projection device or 2K machine. Although it will be upgraded to 4K, the resolution of real IMAX movies is above 6K, and the picture quality is obviously different.

Third, the fare is different:

1, IMAX screens are not allowed to show ordinary movies, so the ticket price is generally high, and the ticket price of IMAX 3D is as high as 150 yuan to 180 yuan.

2.DMAX screen can attract funds by showing ordinary films, while "China Giant Screen 3D" does not make profits by charging high technical patent fees, thus ensuring the interests of cinemas, cinemas and audiences. Due to cost reasons, DMAX fares are also more affordable than IMAX. For example, ordinary 3D movie fares range from 70 yuan to 80 yuan, and DMAX 3D fares range from 90 yuan 100 yuan.

Extended data:

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 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

Baidu encyclopedia -dmax

Baidu encyclopedia -IMAX