How To Judge The Pros And Cons Of IP Cameras?

We can roughly judge the pros and cons of IP cameras through the following five points:

1. Clarity test

The definition of high-definition camera can be simply judged by the ordinary video image definition (line count) test card. This method can directly distinguish the clarity of the image by the naked eye. Generally speaking, the indicator of the high-definition 720P camera test card can clearly distinguish the TV line larger than 800TVL, while the indicator of the poor high-definition camera will be low, and the image Has jitter or burrs.

2. Dynamic range test

The gray level data of the high-definition image can be simply judged by the ordinary video image gray level test card.

3. Color restoration

Judge and compare the degree of color reproduction of high-definition video images through a color test card or the naked eye. Generally, a good high-definition IP camera has a very high degree of restoration, and can almost achieve a very realistic restoration effect.

4. Signal-to-noise ratio

The suppression of noise under the same picture is also one of the important indicators to measure the performance of high-definition IP cameras. The fast and bright processing of dark blocks in the picture and noise suppression directly determine the quality of the image. There are many low-end cameras that can only output a clearer picture in an ideal state of more than 100Lux, and the ability to adapt to changes in the light environment Very poor, there is no effective means of noise suppression in strong light or dark light environment, and the image quality cannot be guaranteed. High-definition images are meaningless in this case, and we call them pseudo-high-definition.

5. Image coding and compression algorithm

The quality of the IP high-definition camera's image encoding and compression algorithm is also one of the important indicators that directly affect the performance of the camera. The encoding and compression processing chips of high-definition camera video images on the market are divided into two types of carriers: DSP chips and ASIC chips. Each has its own merits. DSP chips are relatively flexible in function and application, and have a short development cycle, but the coding efficiency is low and the cost is high. The function application of ASIC chip is relatively fixed, and the development cycle is long, but the coding efficiency is very high, and the cost is low after large-scale use. No matter what kind of carrier it is, it needs a good video coding and compression algorithm, and a good algorithm can reduce the video code stream and storage capacity as much as possible while ensuring the image quality and clarity. Poor IP high-definition cameras tend to produce mosaics or water ripples in the case of a large amount of motion, which directly affects the video image quality.