What do you mean by the wide dynamic of the surveillance camera?

Wide dynamic technology is a technology used to let the camera see the image features in a very strong contrast.

When the high-brightness area is irradiated by a strong light source (sunlight, lights or reflections, etc.). ) and shadow, backlight and other areas with relatively low brightness coexist in the image. The bright areas will turn white due to overexposure, and the dark areas will turn black due to underexposure, which seriously affects the image quality.

The performance of the camera is limited to the brightest and darker areas in the same scene, which is commonly called "dynamic range".

technical knowledge

Wide dynamic range is the ratio of the brightest brightness signal value that an image can distinguish to the darkest brightness signal value that can be distinguished.

The expression of wide dynamics is expressed by "multiple" or "dB". When 100IRE is taken as the standard, the conversion formula is: N dB=20log(V2/V 1). The wide dynamic value of an ordinary camera (called V 1) is 10dB, for example, 48 dB, and the difference between it and the ordinary camera is 38 dB, V2/V 1=80, which shows that the wide dynamic difference between it and the ordinary camera is 80 times, and that of Panasonic's third-generation wide dynamic camera is 54 dB, V2/V/kloc.

The typical dynamic range of ISD-A/KOOC-0/0 camera on the pool is 95 dB, v2/V/KOOC-0/=/KOOC-0/7782 times, and the maximum wide dynamic range is/KOOC-0/20 dB, v2/V/KOOC-0/= 3/KOOC-0/60. From the "multi" point of view, the wide dynamic range of the camera using Pixim DPS technology is greatly improved than that of CCD.