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Mode anisotropic picture smoothing method realized by using truncation median filtering

An anisotropic and image smoothing technology, applied in the field of image processing, can solve problems such as difficulty in determining the mode value, indetermination, inaction, etc.

Inactive Publication Date: 2009-10-28
HARBIN INST OF TECH
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Problems solved by technology

[0024] The purpose of the present invention is to provide a method that can overcome the problem that the mode value is difficult to determine or cannot be determined in the anisotropic image smoothing algorithm based on mode value filtering, avoid the inaction of the filter on the critical position of the image, and improve image smoothing Mode Value Anisotropic Image Smoothing Method Realized by Censored Median Filter

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  • Mode anisotropic picture smoothing method realized by using truncation median filtering
  • Mode anisotropic picture smoothing method realized by using truncation median filtering
  • Mode anisotropic picture smoothing method realized by using truncation median filtering

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Embodiment Construction

[0038] The present invention will be further described below in conjunction with accompanying drawing and specific embodiment:

[0039] In the present invention, the truncated median filter is used instead of the mode filter to realize the anisotropic image smoothing method based on the mode filter, and the smoothing method itself is mainly calculated according to the formula (4).

[0040] The implementation of the truncated median filter can be realized by the following method:

[0041] Algorithm: Trucated_median(μ 0 ,w,N)

[0042] Input: the original image μ to be smoothed and filtered 0 ;window width w;number of iterations N

[0043] Output: Image μ after N times of truncated median filtering

[0044] 1. begin / * begin * / ;

[0045] 2.repeat{N times} / *repeat N times* / ;

[0046] 3.repeat{m×n times} / *repeat m×n times, images m and n are respectively image μ 0 number of rows and columns * / ;

[0047] 4. Find the mean value of 3×3 pixels in the window;

[0048] 5. Calculat...

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Abstract

The invention relates to a mode anisotropic picture smoothing method realized by using truncation median filtering. Aiming at overcoming the problem that the mode is difficult to or can not be determined in an anisotropic picture smoothing algorithm based on mode filtering and avoiding inaction of a filter to a picture critical position point, the invention introduces an approximation approach of the mode filtering, namely the truncation median filtering, and uses the truncation median filtering to realize the mode anisotropic picture smoothing method, while the realization of the mode is approximated by the truncation median filtering that is convenient for realization, thus overcoming the problem that the mode is difficult to determine or can not be determined in the anisotropic picture smoothing algorithm based on the mode filtering, avoiding the inaction of the filter to the picture critical position point, realizing a mode anisotropic picture smoothing algorithm realized by using the truncation median filtering, and achieving the purpose of improving the smoothing effects of pictures.

Description

(1) Technical field [0001] The invention relates to the field of image processing, in particular to a smoothing method capable of removing image noise and maintaining image edges. (2) Background technology [0002] Some noises are often superimposed in medical images, radar images, and remote sensing images. These noises seriously affect the image quality, reduce the imaging system's ability to distinguish targets, affect the understanding, detection and extraction of image properties or features, and limit the application of images. Therefore, taking effective measures to remove or reduce the impact of noise has always been an important research topic. [0003] Image denoising or noise reduction is also called image smoothing. Generally, it is required to effectively suppress noise while retaining useful details of the image, such as maintaining image edges, sharp angles, etc., which brings difficulties to image smoothing algorithms. [0004] For example, in medical ultras...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/20A61B8/00G01S7/52
Inventor 沈毅马立勇王艳李晓峰
Owner HARBIN INST OF TECH
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