Camera Plate
Top 10 tip how to choose HD surveillance cameras
We know next to high-definition surveillance cameras in the end how to choose:
1, to understand the demand: high-definition cameras are used in the financial system, road traffic control and other special requirements on the image place. These sites are required for a high image to see facial features, license plate numbers. Therefore, you can choose from a cost up to consider whether the product.
2, to understand the product: At present, the market is higher than 480 lines to the camera positioned as high-definition security cameras systems, in fact, the market for more than 500 high-definition camcorder line with some of the CCD and 480 lines is basically the same, mainly video digital processing chip (DSP) are different. Some manufacturers have a strong R & D capabilities, they developed a 15? 16-bit (bits) digital video processing chip, compared to the market 480TVL camera SONY 10-bit (bit) chips have more data capacity and faster image processing processing speed.
3, target detection: in fact, more than 500 lines of high-definition surveillance cameras and 480 lines of resolution, just from the naked eye is difficult to distinguish out. Therefore, the first to use professional testing equipment to test, test the camera’s resolution, color reproduction, signal to noise ratio, low-light, synchronization, color sync, subcarrier frequency and other technical indicators. Second, it can simulate a number of scenarios for testing. Mainly observed static definition, dynamic clarity, color fidelity. You can shoot scenery, scenery, flowers, moving objects, people, observe the screen is clean, the noise size, color is natural and realistic.
4, functionality: high-definition surveillance cameras are mainly reflected in the clarity of the screen, to achieve clarity of the screen, not just a horizontal resolution of 540TVL on the line, also has some of the best wide dynamic range, automatic white balance , adjust image sharpness, super digital noise reduction (SNR), intelligent digital automatic metering compensation function. Dynamic function in the detection of a wide need to observe the bright areas and dark areas are clear transition between the natural, wide dynamic range is automatically adjusted. Good camera in the bright and dark areas are rich in layers and delicate performance of the big lamp at night to see the license plate, the headlight contours, filament and plate are very clear, and there are no vertical bright line. The illumination will have to observe at night surveillance camera images are clear, how the size of the noise.
5, the operation set: Set the main operating parameters are set from the camera easy to examine. The current high-definition video camera operating mainly through the menu and set the dial to adjust the code in two ways. The camera with the menu function you need to pay attention to the menu is rich, is it easy to fine, the complex can meet different monitoring environments. Chinese menu intuitive than the English menu, debug, easy to use. Currently, some cameras have a standard menu during the day, day and night, night KTV entertainment, custom mode, you only need to select a model can easily deal with complex environmental needs, quickly and easily.
6, data interface: In practical applications, surveillance cameras may be due to environmental or human damage, leading to not work properly. Therefore, to purchase high-definition cameras, we should also pay attention to its data interface is rich. Observe whether there is an alarm on the rear panel interface, audio interface and RS-485 interface. Some interfaces can improve the monitoring of the security level, and some interface to facilitate remote menu called Settings.
7, wide range of power: in the actual project, the power often encounter the phenomenon of instability and burn video camera. Especially in remote mountainous areas, high voltage, low and very prone to surveillance cameras can not function properly. Currently, most of the camera’s power is DC24V and AC12V. However, some camera manufacturers have power redundancy features, such as the standard voltage is AC12V, but the camera is in 9? 16V between the normal work. The advantage of wide range of power when the voltage instability naturally prominent.
8, installation and commissioning: high-definition cameras and regular security cameras basically the same method of installation and debugging, but must pay attention to matching a good shot because the lens quality is not good, or bad option, will largely affect the clarity of the screen degrees. Such as the size of the lens, and video surveillance systems have to consider whether the match. There, after the lens focal plane to align, front glass protective cover to use good quality optical glass, these will affect the clarity.
9 matching products: To obtain high-definition video, in addition to front-end high-definition video camera, the transmission system, the intermediate system and the terminal display system must meet the requirements of bandwidth and compression, in order to achieve the practical effect of high-definition. Including cable, matrix, DVR, video server, a variety of video encoders. Cable bandwidth, low attenuation, high noise immunity, may be better to transfer the image to ensure the indicators. Terminal equipment, the best choice for progressive scan display monitor, and is 600 lines or more. Therefore, the use of high-definition video camera light while ignoring other supporting equipment used is not up to the real purpose.
10, technical support: Finally, before buying the product, do not forget about the product on the manufacturer’s technical support, whether they can provide specialized technical training, special product features and a detailed explanation of the Actions menu, which for engineering construction is, are the most practical. In addition, if the product does not work the problem, the vendor is able to provide technical services in the shortest possible time, to maintain and repair products, this point is very important.
About the Author
Security-cctv-camera.com store specialize in supplying security products, we offer various kinds of video surveillance such as ,video surveillance systems, security camera system.We promise to offer you products with top quality, reasonable price with 2 years warranty.
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