Random noise filtering method based on the inter-frame registration

• We proposed a random noise filtering algorithm based on the inter-frame registration.
• An improved registration algorithm is applied to the field of video image de-noising.
• The video image is divided into different situations for noise reduction respectively.
• The proposed algorithm can effectively protect the image edge and detail information.

One of the problems to be solved in image processing is how to eliminate image noise effectively. In this work, we brought forward a random noise filtering method based on the inter-frame registration. Firstly, we calculated the relative displacement of the adjacent frames by a registration algorithm. Then we divided the image into the overlapping area and the non-overlapping area according to the relative displacement. Finally, we do noise reduction processing for these two areas respectively. The experiments results indicate that the proposed method can reduce noise in both spatial and time domain of video images. The main advantage is that it cannot only remove noise, but also effectively protect the image edge and detail information. Besides, it not only maintains the de-noising effect of traditional inter-frame algorithm, but also is suitable for moving targets. It has better real-time performance and wider application range.