| 基于WDFB及形态膨胀的图像压缩算法 |
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| 引用本文： | 金炜,尹曹谦,杨任尔. 基于WDFB及形态膨胀的图像压缩算法[J]. 光电工程, 2008, 35(3): 93-96 |
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| 作者姓名： | 金炜 尹曹谦 杨任尔 |
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| 作者单位： | 宁波大学,信息科学与工程学院,浙江,宁波,315211 |
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| 基金项目： | 浙江省教育厅资助项目 , 宁波大学人才工程项目 |
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| 摘 要： | 将小波和方向滤波器组结合,实现了一种非冗余的图像变换WDFB,它满足各向异性尺度关系,能更稀疏地表示诸如边缘和纹理等几何特征.利用WDFB的优势,提出一种基于形态学操作的有效的图像压缩算法.该算法利用重要树来表达子带间的相关性,同时采用形态膨胀算子来聚类子带内的重要系数.实验结果表明,新算法在PSNR指标上明显优于基于小波的压缩算法,尤其对于含有丰富纹理的图像.例如对于512×512的Barbara图,在0.25bpp压缩率下,新算法比SPIHT和MRWD算法的PSNR分别提高1.08dB和0.87dB.
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| 关 键 词： | 图像压缩 小波方向滤波器组(WDFB) 形态膨胀 聚类重要系数 形态膨胀 图像 压缩算法 Dilation Filter Banks Based Algorithm Compression MRWD SPIHT 压缩率 指标 PSNR 结果 实验 重要系数 聚类 膨胀算子 相关性 表达 |
| 文章编号： | 1003-501X(2008)03-0093-04 |
| 收稿时间： | 2007-04-01 |
| 修稿时间： | 2007-04-01 |
Image Compression Algorithm Based on Wavelet-Directional Filter Banks and Morphological Dilation |
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| JIN Wei,YIN Cao-qian,YANG Ren-er. Image Compression Algorithm Based on Wavelet-Directional Filter Banks and Morphological Dilation[J]. Opto-Electronic Engineering, 2008, 35(3): 93-96 |
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| Authors: | JIN Wei YIN Cao-qian YANG Ren-er |
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| Affiliation: | JIN Wei,YIN Cao-qian,YANG Ren-er ( Faculty of Information Science & Technology,Ningbo University,Ningbo 315211,China ) |
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| Abstract: | Combined wavelet with directional filter banks,a non-redundant image transform called as Wavelet-Directional Filter Banks (WDFB) was realized. It fulfilled the anisotropy scaling law and could represent the geometrical features such as edges and texture more sparsely. By taking the advantages of the WDFB,an efficient image compression algorithm based on morphology operator was proposed. The new algorithm used the significant tree to express the correlation of inter-band while utilizing morphological dilatio... |
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| Keywords: | image compression Wavelet-Directional Filter Banks (WDFB) morphological dilation cluster the significant coefficients |
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