Used to reduce noise interference in weak signal information images. Since the appearance of image noise is random, the noise appearing in each frame of the image is different. 3D digital noise reduction automatically filters out non-overlapping information (i.e. noise) by comparing several adjacent frames of images, thereby displaying a relatively pure and delicate picture.

Common video denoisers generally do not contain noise estimation, and generally adopt the same denoising method for all images. Therefore, adaptive denoising cannot be achieved. Although some can choose the noise reduction method, most still require the user to control it through the remote control.

This brings inconvenience to users and is not a truly intelligent process. Therefore, it is proposed to quantitatively detect noise in video images first, and then adaptively select the method and intensity of noise reduction within the denoiser based on the detected noise level.

Extended information

The origin of television

In 1880, the Frenchman Leblanc proposed to make a mirror vibrate at different speeds on two different axes to form A straight line scan back and forth to decompose and reproduce the image. In 1883, the German Nipkov proposed the disk scanning method; in 1897, the German Braun invented the cathode ray tube to display rapidly changing electrical signals.

In 1904, the British Bellwell and the German Cologne invented television technology that telexed one photo at a time. Each photo took 10 minutes to transmit. In 1923, Russian-American scientist Zvorygin applied for patents for photoelectric picture tubes, television transmitters and television receivers. He used a comprehensive "electronic television" sending and receiving system for the first time and became a pioneer in modern television technology.

Baidu Encyclopedia—Video Noise