【正文】
S={ P1,P2,P3,P7,P8,P9} (2) 如果 P5 受噪聲污染,在方程( 1)替代戰(zhàn)略所涉及的原則是,由 P2 或 P8 替代其灰度級(jí)比使用 MIN[S]或 Max[S]更好。 輸出( X,Y) = 方程 4 表示,只有當(dāng) P5 到 Min[S] 或者 Max[S] 的距離 不小于 16采取替換措施。 此外,它可以使用簡(jiǎn)單比較器和減法器 來(lái)實(shí)現(xiàn),因此可以有效 用于實(shí)時(shí)應(yīng)用 。此外,它可以使用簡(jiǎn)單比較和減法。方程( 1)的限制,使得本來(lái)的 Min[S] 或是 Max[S]也會(huì)被脈沖噪聲損壞,要么是 Min[S]要么是 Max[S]等于 P5,方程( 1)未能執(zhí)行所需過(guò)濾操作。它消除大部分的 MF 和 MMF 的缺點(diǎn)。Improved 2D Median Filter for OnLine Impulse Noise Suppressiom AbstractAn inproved 2D median filter employing multishell concept to suppress impulse noise ,is performance of proposed filter is evaluated over image ‘LENA’ ,The impulsive noise is added using MATLAB modified strategy reduces the mnuber of replacement and results in better performance and simple hardware realization that is suitable for online implementation. Index termsMedian Filter , Multishell Median Filter, Impulse Noise In TV and other imaging systems,impulse noise is a mon impairment . The standard signal is often contaminated with impulsive noise arising from various sources such as household electrical appliance and atmospheric banding of the signal further increases the level of impulsive noise. Various filters are proposed to suppress such impairments[1].The median filter(MF)[12] is widely used for impulse noise suppression and the multishell median filter(MMF)[3] in