| 带噪图像的多扫描阈值分割编码算法的研究 |
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| 引用本文： | 雷辉. 带噪图像的多扫描阈值分割编码算法的研究[J]. 计算机应用与软件, 2009, 26(3) |
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| 作者姓名： | 雷辉 |
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| 作者单位： | 长沙理工大学电气与信息工程学院,湖南,长沙,410076 |
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| 基金项目： | 湖南省教育厅资料科研项目(08C087) |
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| 摘 要： | 零树编码算法是一种有效的图像编码算法,但是噪声会破坏零树结构特性,影响零树编码算法的效率,针对噪声图像提出一种基于多扫描阈值的图像分割编码算法,该算法利用多扫描阈值结构对噪声图像进行软阈值去噪、并完善逐次逼近量化过程;对重要高频子带采用图像分割编码,只对重要系数进行编码, 将大量非重要系数集中成图像块不予编码,更有效地降低码率.实验结果表明,算法有效地去除了噪声,提高了编码图像的质量和编码效率,在相同的压缩比条件下,算法在编码速度、图像复原质量方面都优于EZW算法.
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| 关 键 词： | 零树编码 多扫描阈值 逐次逼近量化 图像分割 |
ON MULTI-SCANNING THRESHOLD SEGMENTATION CODING ALGORITHM FOR NOISY IMAGE |
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| LEI Hui. ON MULTI-SCANNING THRESHOLD SEGMENTATION CODING ALGORITHM FOR NOISY IMAGE[J]. Computer Applications and Software, 2009, 26(3) |
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| Authors: | LEI Hui |
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| Affiliation: | School of Electrical and Infomational Engineering;Changsha University of Science and Technology;Changsha 410076;Hunan;China |
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| Abstract: | The zerotree coding is an efficient image compressing methods,but the noise can impact the structure character of zerotree and affect the efficiency of the coding algorithm.An image segmentation coding algorithm based on multi-scanning threshold is presented in this paper aiming at the noisy image.The algorithm uses multiple scan threshold structure to denoise the noisy image in soft-threshold way,and improves the successive approximation quantization process.The image segmentation coding algorithm is used ... |
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| Keywords: | Zerotree encoding Multi-scanning threshold Successive approximation quantization Image segmentation |
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