We can roughly judge the pros and cons of IP cameras by the following five points:
1, clarity test
The clarity of the HD camera can be easily judged by an ordinary video image sharpness test card. This method can directly distinguish the sharpness of the image through the naked eye. Generally, the HD 720P camera test card indicator can clearly distinguish more than 800TVL TV lines, while the poor HD camera will be low, and the image will be low. There are jitters or burrs.
2, dynamic range test
The gray level data of the high definition image can be easily judged by an ordinary video image gray scale test card.
3, color reproduction
The color reproduction degree of the high-definition video image is judged by the color test card or the naked eye. Generally, the high-definition IP camera has a very high degree of reduction, which can achieve a very realistic reduction effect.
4, signal to noise ratio
Noise suppression in the same picture is also an important indicator to measure the performance of HD IP cameras. For the bright processing of the dark blocks in the picture, the noise suppression directly determines the image quality effect of the image. There are many low-end cameras that have poor adaptability to changes in the light environment, and there is no noise suppression in the environment of strong light or dark light. Effective means cannot guarantee image quality.
5, image coding compression algorithm
IP camera image encoding compression algorithm is also one of the important indicators that directly affect the camera performance. At present, the high-definition camera video image encoding compression processing chip on the market is divided into two kinds of carriers: DSP chip and ASIC chip. Both have their own merits. Regardless of which carrier requires a good video coding compression algorithm, a good algorithm can reduce the video stream and storage capacity as much as possible while ensuring image quality and clarity.