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arXiv 1003.1803cs.CV
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基于非线性滤波的图像去噪AMF方法

Nonlinear Filter Based Image Denoising Using AMF Approach

Sri Venkateswara College of Engineering, Anna University(安娜大学斯里文卡特斯瓦拉工程学院)

T. K. Thivakaran, RM. Chandrasekaran

摘要:

提出了一种基于非线性自适应中值滤波的图像复原新方法。图像去噪是数字图像处理中的一个常用过程,其目的是去除在图像获取或传输过程中可能破坏图像的噪声,同时保持图像的质量。该过程传统上通过滤波在空间域或频域中执行。图像增强的目的是从被污染的图像中重建出真实的图像。图像采集过程经常导致退化,并且数字化图像的质量变得比原始图像差。滤波是一种用于增强图像的技术。线性滤波器是输出像素的值是邻域值的线性组合的滤波,这会在图像中产生模糊。因此,已经开发了各种非线性的平滑技术。中值滤波器是最常用的非线性滤波器之一。当考虑一个小的邻域时,它是非常有效的,但对于大的窗口,在高噪声的情况下,它会导致图像更加模糊。中心加权中值(CWM)滤波器的平均性能优于中值滤波器[8]。然而,在高噪声条件下,原始像素被破坏,降噪效果显著。因此,这种技术也对图像产生模糊影响。为了说明所提出的方法的优越性,克服现有的问题,所提出的新方案(AMF)自适应中值滤波器已被模拟与标准的和各种性能指标进行了比较。

英文摘要:

This paper proposes a new technique based on nonlinear Adaptive Median filter (AMF) for image restoration. Image denoising is a common procedure in digital image processing aiming at the removal of noise, which may corrupt an image during its acquisition or transmission, while retaining its quality. This procedure is traditionally performed in the spatial or frequency domain by filtering. The aim of image enhancement is to reconstruct the true image from the corrupted image. The process of image acquisition frequently leads to degradation and the quality of the digitized image becomes inferior to the original image. Filtering is a technique for enhancing the image. Linear filter is the filtering in which the value of an output pixel is a linear combination of neighborhood values, which can produce blur in the image. Thus a variety of smoothing techniques have been developed that are non linear. Median filter is the one of the most popular non-linear filter. When considering a small neighborhood it is highly efficient but for large window and in case of high noise it gives rise to more blurring to image. The Centre Weighted Median (CWM) filter has got a better average performance over the median filter [8]. However the original pixel corrupted and noise reduction is substantial under high noise condition. Hence this technique has also blurring affect on the image. To illustrate the superiority of the proposed approach by overcoming the existing problem, the proposed new scheme (AMF) Adaptive Median Filter has been simulated along with the standard ones and various performance measures have been compared.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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