1. Quality standards vary: Due to the unbalanced economic development, the performance and technical standards of the video surveillance systems installed by various units and departments are not uniform, and the relevant national regulations are not very sound, resulting in the application of video surveillance by the above units and departments. There is also a large quality difference in the system.
2. The use of video is not the same: The needs of the surveillance video and the purpose of use are inconsistent between the construction unit and the competent person, resulting in a different picture quality due to the different emphasis. Therefore, a series of problems arise when using surveillance video images as evidence or clues.
3, video image compression / transmission / storage / decompression of different quality: Although the current monitoring technology and the corresponding equipment has been widely used in China, but due to the various manufacturers in order to compress storage space and reduce costs and continuously increase the compression ratio . After the video image signal simulated by the video surveillance equipment is input to several links that have been compressed, transmitted, stored, and then decompressed after being converted into a digital signal, the image quality has been affected more or less, the image clarity, gray scale, Color reproduction, real-time performance will be attenuated to varying degrees.
4. Video capture is affected by the external environment and the internal noise of the device: There are many factors that affect the clarity of the image. For example, if the outdoor illumination is not uniform enough, the video image will be too grayscale; the image obtained by the CCD (camera) passes through the A/D. Digital-to-analog conversion. This function is implemented in the image system by a digital acquisition card.) Conversion and line transmission can generate noise pollution. Therefore, the image quality is inevitably reduced. The lighter ones show that the images are not clean and it is difficult to see the details; the heavier ones show that the images are not clear, and even the outline cannot be seen.
The utility model discloses a Kitchen Shower head that is convenient to switch the water outlet mode, has a compact structure, and is easy to use, and a kitchen faucet using the kitchen shower head. , The shower head is provided with a water separator, and the water separator is provided with an annular flow channel and an inner flow channel respectively connected to the spray water outlet body and the V-shaped water outlet body, and the lower end of the outer wall of the water separator is upwardly circular A plurality of water inlet holes connected to the annular flow channel are provided, and a first sealing ring is provided on the lower side of the water inlet hole; the water outlet end of the shower body is connected with a converter, and the converter is provided with a communicating In the water diversion cavity at the water outlet end of the shower body, the lower end of the water diversion device is installed in the water diversion cavity and can move up and down, and the upper end of the inner wall of the water diversion cavity is provided with a convex ring matching the first sealing ring, so The bottom surface of the water diversion cavity is provided with a sealing gasket that can seal the inner flow channel.
Waterfall Shower Head,Overhead Shower Head,Push Button Hand Shower,Brushed Nickel Sink Faucet
Yuyao Zelin Sanitary Ware Co., Ltd , https://www.zelinshower.com