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    ASIA unversity > 資訊學院 > 資訊傳播學系 > 期刊論文 >  Item 310904400/19097


    Please use this identifier to cite or link to this item: http://asiair.asia.edu.tw/ir/handle/310904400/19097


    Title: Denoising of salt-and-pepper noise corrupted image using modified directional-weighted-median filter
    Authors: 陸清達;Lu, Ching-Ta
    Contributors: 資訊傳播學系
    Date: 2012-07
    Issue Date: 2012-11-26 15:17:02 (UTC+8)
    Abstract: Many denoising algorithms have been proposed to recover a noise corrupted image. However, most of them cannot well recover a heavy noise corrupted image with noise density above 70%. In this Letter, we propose a new approach to efficiently remove background noise by detecting and modifying noisy pixels in an image. If the center pixel of a local window is classified to noisy, this center pixel is replaced by a weighted median value on an optimum direction, enabling impulse noise to be removed. Conversely, the center pixel is kept unchanged when it is classified to noise-free, yielding the quality of restored image being well maintained. Experimental results show that the proposed approach cannot only efficiently suppress high-density impulse noise, but also can well preserve the detailed information of an image. ⺠Propose a modified directional-median filter to efficiently remove impulse noise. ⺠The quality of restored image can be well maintained. ⺠Proposed approach can efficiently suppress high-density (greater than 80%) noise.
    Relation: PATTERN RECOGNITION LETTERS
    Appears in Collections:[資訊傳播學系] 期刊論文

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