Image filtering method and device, terminal and computer readable storage medium

Abstract

The invention belongs to the technical field of image processing, and mainly provides an image filtering method and device, a terminal and a computer readable storage medium. Redundant pixels in each first pixel matrix are removed to obtain a second pixel matrix corresponding to each first pixel matrix, the sorting data size in the process of taking the median of the pixel values of the pixels in the second pixel matrix as the pixel value of the target pixel in the first pixel matrix corresponding to the second pixel matrix is reduced, and the efficiency of filtering the image to be filtered is effectively improved.

Description

technical field [0001] The present application belongs to the technical field of image processing, and in particular relates to an image filtering method, device, terminal and computer-readable storage medium. Background technique [0002] Noise is very common in the image field, and impulse noise is one of the common noises. It is generally believed that the impulse noise is caused by the short-term strong interference of the digital image signal, which makes some pixels of the image become white or black. As the interference becomes stronger, more and more pixels will be disturbed. The bigger it is, the bright spots on the image look like salt grains sprinkled on the image, and the dark spots look like peppercorns, so impulse noise is also called salt and pepper noise. [0003] In the prior art, the median filter is generally used to filter out the salt and pepper noise. However, when the median filter is used to filter an image, the problem of low filtering efficiency of...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the median filter is generally used to filter out the salt and pepper noise. However, when the image is filtered by the median filter method, there is often a problem of low filtering efficiency.

Images