A 3D filtering method based on monitoring scene

Abstract

The invention provides a 3D filtering method based on monitoring scene. The method comprises the following steps: dividing a target frame image into a plurality of non-overlapping pixel blocks; determining the types of the target blocks successively wherein the blocks are divided into static blocks and moving blocks; if the blocks are moving blocks, using the moving blocks as center and from the inside to the outside, regulating the target blocks from the big ones to the small ones and the moving intensity of the multiple layered surrounding blocks distributed at the circumference of the target blocks; and controlling the pixel points of the target blocks and the surrounding blocks to filter at the regulated moving intensity. According to the invention, the moving intensity of the moving blocks and the multiple layered surrounding blocks distributed at the circumference of the target blocks is regulated in a way that it decreases from the inside to the outside, which means the moving intensity of pixel blocks in different layers can transition in a uniform manner so as to avoid the apparent blocking effect caused by the vast difference in moving intensity between the moving blocks and the static blocks.

Description

technical field [0001] The invention relates to the field of image filtering, in particular to a monitoring scene-based 3D filtering method. Background technique [0002] At present, with the rapid development of the field of security monitoring, users have gradually increased their requirements for the clarity of surveillance video images. However, during the process of digitalization and transmission, video images are often disturbed by noise from imaging equipment and the external environment, and noise images with small and rough spots are prone to appear, reducing the clarity of video images. Therefore, it is necessary to adopt an appropriate noise reduction method to reduce the impact of noise on video images. [0003] 3D (three-dimensional, English full name: three dimensional) filtering method is a commonly used video image noise reduction method. The 3D filtering method uses reference frame images (such as adjacent historical frame images) as the filtering referen...

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a 3D filtering method based on a monitoring scene to solve the technical problem in the prior art that block effects tend to occur between moving areas and static areas

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