One of the most important functions of surveillance equipment is to monitor whether the big screen is showing properly, not primarily to monitor the audience. The shape of the screen, in turn, determines the size of the auditorium, and this is particularly true of new forms of cinema.
Different varieties have different shapes of screen, the screen size of the large-view movie determines the height ratio of the auditorium, the screen of the circular movie determines that the auditorium must be round, and the screen of the dome movie needs a dome auditorium and so on.
The quality standards for movie theaters are divided into four grades: extra, A, B, and C (cross-combined with extra large, large, medium, and small). Extraordinary requirements are determined on a case-by-case basis. A, B, C and so on the corresponding requirements should be consistent with the following provisions:
I, the main structure of the durability: A more than 100 years, B 50 to 100 years, C 25 to 50 years.
Two, fire resistance level: A, B, etc. should not be less than two; C, etc. should not be less than three, and there should be no extra large.
The movie theater with a camera, almost in every corner of the infrared night vision cameras are set up, or 360 degrees without dead angle. Camera (CAMERA or WEBCAM) is a video input device, a kind of closed-circuit television, is widely used in video conferencing, telemedicine and real-time monitoring.
Camera generally has a video photography, dissemination and static image capture and other basic functions, is by the lens to capture the image, by the camera within the light-sensitive components of the circuit and control components of the image processing and converted into a computer can recognize the digital signal, and then by the parallel port, the USB connection, the input to the computer by the software and then restore the image, thus forming the picture.
Cameras can be divided into two categories: digital cameras and analog cameras. Digital cameras convert analog video signals generated by video capture devices into digital signals, which are then stored in the computer. Analog cameras capture video signals that must be converted to digital mode by a specific video capture card, and compressed before they can be converted to a computer.