Video intercom system, dual-lens surveillance
The dual-lens surveillance in the video intercom system was used in some devices. For example, the 360 video doorbell 5 Max dual-camera version was equipped with dual lenses. The dual lens could provide monitoring from different angles or different fields of view, adding more functions and advantages to the visual intercom system. Its dual lenses could cover more areas. For example, one lens could focus on the main area in front of the doorbell, and the other lens could cover a wider range, thereby reducing the number of blind spots. This would help to have a more comprehensive view of the situation outside the door in the video intercom scene. Whether it was the location of the visitor, the appearance, or the surrounding environment, the information could be more completely obtained, thereby improving the safety and practicality of the video intercom system. Read more exciting novels for free
Surveillance camera with a lens
The surveillance camera was just a single video capture device. The resolution and resolution of the lens were higher than that of the computer's video head, but it could not catch up with professional digital cameras or DVs. In reality, cameras and lenses were mostly purchased separately. The user can calculate the focal length of the lens according to the size of the target object and the distance between the camera and the object to determine the required lens. The lens required by each user depends on the actual situation. It cannot be assumed that the camera (head) already has a lens and does not need to be equipped with another lens. The focal length of the lens determined the field of view of the camera. For example, a wide-angle lens was suitable for shooting in a large space and could capture more content. A telephoto lens was suitable for long-distance shooting and could see details in the distance. Indoors, they usually chose short focal lenses, such as 2.8mm or 3.6mm lenses, while outdoors, they chose lenses based on distance. Moreover, different focal length lenses had different imaging effects. Long focal length lenses could see more details of distant objects, but the field of view became smaller and the viewing range became narrower. Wide-angle lenses had a wide viewing range, but it might be difficult to distinguish some details. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Surveillance camera lens type
Based on context alone There were many types of surveillance camera lenses, and the following were the common ones: ** I. By focal length ** 1. ** Fixed focus lens ** - [Special characteristic: Fixed focal length.] For example, 3.6mm and 6mm fixed-focus lenses. The 3.6mm fixed-focus lens had a wide field of view and was suitable for monitoring close-up and large-scale scenes, such as the internal monitoring of small shops. The field of view of a 6mm fixed-focus lens was relatively narrow, but it could see further. It was suitable for monitoring long and narrow spaces such as corridors or specific long-distance scenes such as the entrance of a community. 2. ** Zooming lens ** - [Special characteristic: The focal length can be changed within a certain range.] The electric zoom lens could adjust the focal length remotely through the control device, making it convenient to adjust the monitoring range according to the actual monitoring needs. For example, a 2.8 - 12mm zoom lens could be adjusted from a wider field of view to a narrower field of view to focus on distant targets. ** 2. By field of view ** 1. ** Wide-angle lens ** - [Special characteristic: Large field of view, generally greater than 60 degrees.] It could cover a large monitoring range, but the monitoring distance was relatively short, and there might be some distortion at the edge of the screen. It was often used to monitor open indoor spaces or large areas around buildings. 2. ** Telephoto lens ** - [Special characteristic: Small field of view, usually less than 30 degrees.] It could monitor targets far away, but the coverage was narrow. For example, in a large warehouse, it was used to monitor the goods on the distant shelves. ** 3. By function and special lens ** 1. ** Fisheye lens ** - [Description: Field of view is close to or equal to 180 degrees or even larger. It can provide a very wide field of view and can achieve a hemisphere or even global surveillance image.] However, the image was severely distorted and required special image processing technology to restore the normal image. It was often used in places that required comprehensive surveillance, such as the central courtyard of some large shopping malls and other public places. 2. ** Pinhole lens ** - [Special traits: Small and concealed lens, small aperture.] It is suitable for covert surveillance, such as special places that require secret surveillance to ensure safety, but it must be used in accordance with laws, regulations, and ethics. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
The lens structure, the surveillance camera
In terms of the structure of the surveillance camera lens, it could be divided into a large lens and a small lens. The lens had two important parameters, namely the focal length and aperture. The focal length was usually 4mm, 6mm, 8mm, 12mm, etc. The larger the millimeter, the smaller the range, but the further the distance. For example, the warehouse usually used a 4mm lens, the residential building unit door usually used a 6mm lens, and the small road usually used a 12mm lens. The aperture was the F value that appeared on the lens, generally F1.0, F1.2, F1.4, F1.6, etc. The smaller the F value, the greater the amount of light, and the more expensive the lens. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Surveillance lens product summary
The surveillance camera lens was the lens of a surveillance camera. As a video capture device, its resolution and resolution were higher than that of a computer video head, but lower than that of a professional digital camera or DV. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Is there a difference in the size of the surveillance camera lens
There was a difference in the size of the surveillance cameras. Different sized lenses had different viewing angles and distances. Generally speaking, the smaller the millimeter of the lens, the larger the angle of the surveillance picture, but the clearer the distance. On the contrary, the larger the millimeter of the lens, the smaller the angle of the surveillance picture, and the clearer the distance. For example, the 2.8mm focal length lens has a large viewing angle, suitable for monitoring small spaces such as storage rooms within 3 meters; 4mm can be used for indoor environments such as living rooms and small shops; 6mm is suitable for small shops or doorways of 5 - 10m; 8mm is best for outdoor roads and alleys of 10 - 20m; 12mm is mainly used for specific locations such as entrances and exits of about 20 - 30m. In addition, from the relationship between angle and distance, the larger the angle, the closer the distance. For example, the 3.6mm lens was 67.4 degrees, and the distance was 15 meters; the 6mm lens was 42.3 degrees, and the distance was 20 meters; the 8mm lens was 32.6 degrees, and the distance was 25 meters; the 12mm lens was 22.1 degrees, and the distance was 40 meters; and the 16mm lens was 17.1 degrees, and the distance was 60 meters. The common surveillance camera lenses on the market were arranged according to the size of the frame: 2.8mm, 3.6mm, 4mm, 6mm, 8mm, 12mm, 16mm, 24mm, etc. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Household Xiaomi surveillance camera lens
There were many models of Xiaomi home surveillance cameras, and the functions of different models were different. Some of Xiaomi's home surveillance cameras had higher resolution lenses. For example, the Xiaomi smart camera C500 dual camera version had four million resolution, and the angle of view was large and could be seen clearly when zoomed in. The Xiaomi smart camera C700 had eight million resolution and 4K image quality. The lens could be rotated 360 degrees horizontally and 110 degrees vertically, which could accurately identify the movement of people and prevent visual blind spots from appearing. There were also some models with multiple functions, such as infrared night vision, intelligent tracking, support for two-way voice intercom, etc., and played an important role in ensuring family safety, such as monitoring the situation at home through AI humanoid detection, AI Face Recognition, and other functions. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
How to choose the size of the surveillance camera lens
Choosing the lens size of a surveillance camera required a combination of many factors. First of all, the size of the monitoring scene should be considered. If it was a narrow environment such as elevators and stairs, 2.8mm focal length was more suitable; for slightly larger scenes such as conference rooms and shops, 4mm lenses were suitable; parking lots, factory workshops, courtyards and other open places, 6mm lenses could be used. From a distance perspective, different focal lengths corresponded to different effective monitoring distances. For example, a 3.6mm lens was 15 meters away, a 6mm lens was 20 meters away, an 8mm lens was 25 meters away, a 12mm lens was 40 meters away, and a 16mm lens was 60 meters away. Generally, 3.6 - 6mm cameras are within 40 meters, mostly for indoor machines or wide-angle lenses dedicated to the door; 6mm and above are narrow-angle lenses with an effective distance of about 100 meters, and 25mm lenses have an effective distance of about 150 meters. The lens equipped with the high-speed laser cloud platform machine can reach an infrared distance of 300 meters. In addition, it also needed to be considered according to the image effect of the monitoring target on the monitor and the specifications of the CCD. If you need to monitor a relatively close object and have high definition requirements, the effect of a fixed-focus lens may be better than a zoom lens. At the same time, if it is an environment with constant lighting conditions, such as a laboratory, a fixed aperture lens can be used; if the illumination changes are not obvious, a manual aperture lens can be used and a fixed value can be adjusted; if the illumination changes greatly and requires 24-hour outdoor monitoring, an automatic aperture lens should be used. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Surveillance System
The following are some recommendations from the surveillance system novels: 1. Wind and Cloud Into the Painting Scroll: This is a sweet novel with an ancient setting. It tells a story of the early Tang Dynasty, full of romantic and growing elements. 2. << Foppish Spoilt >>: This novel was written by Miang. The male and female protagonists in the story are youthful and full of sweetness and indulgence. 3. " 80's Sweet Wife and Cute Baby ": This novel created by the author, Xi Zhen, was a sweet system novel. It told the story of a female protagonist who traveled back to the 1980s. It was full of sweet and heartwarming plots. I hope these recommendations can satisfy your needs for surveillance system novels.
Wired intercom system novel recommendation completed
The following are the recommendations of a few completed novels with the system: 1. " Doomsday brings the system to the end ": The female protagonist transmigrated to the zombie apocalypse and obtained a scam system. She had no choice but to use various NPC identities to walk the plot and give them a perfect ending. 2. [Chongzhen eavesdropping system]: Emperor Chongzhen
The husband who disappeared in the surveillance video
There were many incidents involving her husband and surveillance in the reference materials. Among them, there were women who found suspicious behaviors of their husbands through surveillance, such as bringing strange women home and acting sneakily. There were also interesting things that happened under surveillance, such as husbands being unable to hold their wives, and the surveillance videos of female teachers 'husbands exposing female teachers cheating on male students. In addition, there was also a military historical novel called " The Husband Who Disappeared in the Surveillance Video." If the " husband who disappeared in the surveillance video " here referred to a phenomenon or a related story type, then these events showed the different situations of the husband under surveillance from different aspects. If it was specifically a novel, there was no more information about the content of the novel to elaborate on. Watching " Venom: The Last Dance " wasn't enough. Everyone, please click to read the novel!