Image smoothing method with combination of gradient and curvature

An image smoothing and combining technology, applied in the field of image processing, can solve problems such as boundary damage, unstable image processing effect, and incomplete removal of noise

Active Publication Date: 2015-02-04
上海芯辉电子股份有限公司
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Problems solved by technology

However, most of the improvement methods have not fundamentally solved the defects of the PM method.
In summary, the existing methods mainly have the following problems: when there is noise in the image, due to the relatively large gradient of the noise point and the small diffusion coefficient, the noise cannot be completely removed, and the boundary with noise will also be destroyed; The method itself is pathological in mathematics, and the existence and uniqueness of the solution cannot be guaranteed, which leads to unstable image processing effect

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  • Image smoothing method with combination of gradient and curvature
  • Image smoothing method with combination of gradient and curvature
  • Image smoothing method with combination of gradient and curvature

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[0056] The technical solutions provided by the present invention will be described in detail below in conjunction with specific examples. It should be understood that the following specific embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention.

[0057]Since the second-order differential component contains richer information, the present invention uses the level set curvature in morphology as a local feature representing the image, and provides an image curvature smoothing method. After observing the smoothed image processing results, it is found that when the image When being polluted by noise, the curvature will change significantly, so the present invention further substitutes the level set curvature of the image into the PM method as a detection factor, establishes an image smoothing method combining gradient and curvature, and finally uses MATLAB software to carry out the method Simulations, denoised ...

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Abstract

The invention firstly provides an image curvature smoothing method, and the method takes the image level set curvature as the second order micro component for describing the image morphological feature and improving the image processing effect. The curvature obviously changes while the image is polluted by the noise, the method further takes the image level set curvature as the detection factor to be applied to the PM method, the image smoothing method with combination of gradient and curvature is provided, and the method can keep the feature of the image, the peak value signal to noise ratio is greatly improved compared with the previous anisotropy method, the complexity is low, the timeliness is high, the image resolution is improved, the method has more effectiveness and veracity compared with the previous image smoothing method, and the image processing effect is better.

Description

technical field [0001] The invention belongs to the technical field of image processing, and in particular relates to an image smoothing method combining gradient and curvature. Background technique [0002] In the field of image processing and computer, image denoising is one of the most basic problems. Image smoothing is the technique of enhancing an image by reducing any degradation that may exist. In recent years, the partial differential equation (PDE) method has been widely used in the field of image analysis processing and computer vision. Partial differential equations can reflect the constraint relationship between the derivatives of unknown variables with respect to time and derivatives with respect to space variables. The image processing method based on the partial differential equation expresses the discrete image into a continuous mathematical model, and uses the perfect numerical analysis theory of the partial differential equation to process the image. Com...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/00
Inventor 石兰芳汪美玲周林锋周先春
Owner 上海芯辉电子股份有限公司
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