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基于直方图的图象去噪滤波器

DOI: 10.11834/jig.200307268

Keywords: 直方图,图象去噪,滤波器,灰度,像素,模糊隶属度

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Abstract:

滤除图象噪声时,虽然利用的先验知识越多,其滤波效果越好,但是一般情况下,由于只能得到一幅被污染的图象,无法获得这些先验知识,因而滤波效果较差。为了解决该问题,提出了一种去除图象中椒盐噪声的新型滤波器。该滤波器首先给出了一种有效的估计原图象直方图的方法,进而利用估计直方图的信息来进行滤波;然后对滤波窗口中的像素进行一种排除最大和最小灰度值的操作,以滤除椒盐噪声点。实验表明,该方法滤波效果优于传统的滤波器和其他模糊滤波器,特别是当噪声概率超过0.3时,这种优势尤为明显。

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