Scale-sensitive edge-preserving image filtering method

Abstract

The invention provides a scale-sensitive edge-preserving image filtering method. The edge can be well preserved through global optimization, and good scale sensitivity can be achieved by introducing scale sensitivity measurement to an optimization equation. A filtering result image S of an input image I is calculated by means of iterative optimization. In each optimization process, a filtering image St obtained by current optimization is calculated by minimizing a current energy function. A filtering image obtained by last optimization is a final filtering result image S.

Description

technical field [0001] The invention belongs to the field of nonlinear filtering of digital images, and in particular relates to an edge-preserving image filtering method with scale-sensitive characteristics. Background technique [0002] The edge-preserving filtering of digital images is a kind of nonlinear filtering, the purpose is to filter out the image detail information while keeping the edge information from being blurred, that is, to keep the edges of objects in the image. Due to this characteristic, edge-preserving filtering is widely used in image and computer vision processing, which can achieve good results in digital image and video enhancement, synthesis, high dynamic compression and various stylization, and avoid halo phenomenon. At present, many edge-preserving filtering methods and techniques have been proposed and invented. Among them, bilateral filtering is the most widely used image edge-preserving filtering technique. It uses the product of two Gaussi...

AI Technical Summary

Problems solved by technology

However, Gaussian filtering also blurs the edges of large-scale information at the same time, causing halos, and does not handle object edges well when scale separation

Although the traditional edge-preserving filter can preserve the edge, it is difficult to have the above-mentioned scale-sensitive basic filtering characteristics; and to make the filter have good scale-sensitive characteristics, it is difficult to obtain the ideal edge-preserving effect

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