| 消除文字图像污渍的一种空域滤波方法 |
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| 引用本文： | 王朔中,黄海永.消除文字图像污渍的一种空域滤波方法[J].上海大学学报(自然科学版),2000,6(1):1-4. |
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| 作者姓名： | 王朔中 黄海永 |
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| 作者单位： | 上海大学,通信与信息工程学院,上海,200072 |
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| 摘 要： | 介绍一种清除文字图象中背景污渍的空域滤波方法，Ｇａｕｓｓ加权的局域灰度平均值与像素灰度之差能有效地提取文字细节，同时抑制起伏不平的严重背景干扰，从而达到消除污渍的目的，将滤波输出作适当的后处理可进一步改善图像质量。
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| 关 键 词： | 文字图象 背景污渍 高通滤波 空域滤波法 |
A Space Domain Filter for Stain Removal from Document Images |
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| WANG Shuo- zhong,HUANG Hai- yong.A Space Domain Filter for Stain Removal from Document Images[J].Journal of Shanghai University(Natural Science),2000,6(1):1-4. |
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| Authors: | WANG Shuo- zhong HUANG Hai- yong |
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| Abstract: | A high- pass filter for removing background stain patches from document images is described.The filter is implemented in the space domain.The difference between the Gaussian- weighted local average and the pixel gray level is used to extract characters while suppressing undulating background interference so that stain patches are removed effectively. Contrast enhancementand suitable post- processing are performed to give a satisfactory visually pleasing result. |
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| Keywords: | documentimage background stains high- pass filtering |
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