What is 3D digital noise reduction technology? What is its basic principle?

The 3D DNR surveillance camera can find out the noise position and control its gain by comparing and screening the two images before and after. The 3D digital noise reduction function can reduce the noise interference of weak signal images.

Because the appearance of image noise is random, the noise in each frame of image is different. 3D digital noise reduction automatically filters out non-overlapping information (noise) by comparing several adjacent images. With the 3D noise reduction camera, the image noise will be significantly reduced and the image will be more thorough. Thereby presenting a relatively pure and delicate picture.

Extended data

As soon as analog HD monitoring products came out, ISP noise reduction technology found a place. In the analog high-definition monitoring equipment, the analog high-definition camera can be upgraded at low cost, and the video clarity effect can be improved by 30%.

This is the advantage of this technology. The 3D digital noise reduction function can enable CMOS high-definition cameras to obtain the same or even better images as CCD with the same size in low illumination. In addition, CMOS products have higher dynamic range, which makes the position of CMOS products in high-definition cameras more and more important. Image denoising greatly reduces the amount of video data, thus reducing the pressure of network bandwidth and storage, so there will be no room for simulation in the HD monitoring market.