Image preview quality in Wuxi Monitoring It is very important in the system. There is no playback of the video. The main job of the monitoring system manager is to watch and monitor the image in real time. The image quality is clear. What affects the image quality?
1. Chip
Many manufacturers on the market use the same compression chip with different image quality. This is the reason why the algorithms are different, and why the original data algorithms are different after image compression, and whether the original data is optimized after image compression will affect the image quality. In the domestic soft compression field, which was previously used in a large number of TV capture cards, its video comb filter is 3D, and its image stereoscopic sense and spatial sense are stronger than other chips.
2 Algorithm
When the chips are the same, the algorithm determines the quality of the image. Through the algorithm, how to collect the original image, and how to compress it after collection? Is it partial compression or multiple compression. Some compression will damage the image quality. In view of the development of storage equipment, the original image still needs to be compressed when the large capacity hard disk is still very expensive. The compression rate is too high. The more blurred the image is, the clearer the image is. However, the recording capacity reaches several gigabytes per hour, which the customer will not accept.
3 Display resolution
Resolution As the name implies, you can see the degree of objects. The higher the resolution, the clearer the details of the scene. After being magnified several times, the original image is not distorted but can clearly identify local details. The lower the resolution, even if the image is not magnified, it will feel blurred. Everyone who has installed the system knows that the image is not clear when the machine is installed, let alone three-dimensional. Because the resolution of the system is very low. The monitoring system generally uses monitors, most of which support high resolution. Even if a 21 inch monitor is sold to provide high resolution, almost all monitoring manufacturers do not support 1280 * 1024. They can only force the resolution to be 1024 * 780. They can only force the resolution to be 1024 * 728. In order to adapt to the size of the screen, the system will extrude the image downward and stretch it left and right, The image is deformed when it looks strange. This effect is not as good as buying a 17 inch monitor directly.
4 Recording resolution
The video resolution affects the image quality as well as the display resolution. The video resolution is determined by the algorithm. The recording resolution is proportional to the recording capacity and image definition. The higher the recording resolution, the more space the recording takes up, but the image is clear. The image quality is different with different compression algorithms under the same file.
5 Code stream
To put it simply, parity is the amount of image data. The more data stored per second, the clearer the image will be and the less bit stream will be. That is to say, some details of the image will be lost. With less image data, the space occupied by video recording will be less, and the space occupied by video recording will be less, but the space will also be less. The image is not clear, and the code stream is also proportional to the image quality. In order to save space, many users like to limit the code stream. In fact, too many people do not know the code stream, and the code stream drops, so the image quality is reduced.
When the above situations occur, the image quality in Wuxi system will be affected.
