关键词: 图像消噪, 脉冲噪声, 图像校正

Abstract: A swift filtering algorithm is proposed after a brief analysis of current methods on impulse noise removal.Its main idea is as follows：first，using a critical region to pick up the uncorrupted pixels to build a matrix of signal.Then，treating the signal matrix with eight-direction adding.A restored one will present itself nearly after two-step-correction of after adding image.As a superiority of macro-processing，this algorithm is easy to program and fit for real-time processing.Experimental results indicate that the proposed algorithm works well in denoising images with a normal noise rate and saves time remarkablely.

Key words: image denoising, impulse noise, image correction