| 全相位沃尔什双正交变换及其在图像压缩中的应用 |
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| 引用本文： | 侯正信,王成优,杨爱萍,潘霞.全相位沃尔什双正交变换及其在图像压缩中的应用[J].电子学报,2007,35(7):1376-1381. |
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| 作者姓名： | 侯正信 王成优 杨爱萍 潘霞 |
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| 作者单位： | 天津大学电子信息工程学院,天津,300072;天津大学电子信息工程学院,天津,300072;天津大学电子信息工程学院,天津,300072;天津大学电子信息工程学院,天津,300072 |
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| 基金项目： | 教育部高等学校博士学科点专项科研基金 |
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| 摘 要： | 本文提出了全相位沃尔什双正交变换和对偶双正交基向量的新概念,并提出了一种基于这种变换的、新的图像压缩算法.与JPEG压缩编码算法中的DCT变换做比较,在相同码率下,采用全相位沃尔什双正交变换的重建图像峰值信噪比与DCT变换的大致相同,而该方法最大的优点是量化简单,能对变换系数进行均一量化,从而大大缩短运算时间,且便于硬件实现.
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| 关 键 词： | 全相位沃尔什变换 双正交变换 对偶双正交基向量 JPEG压缩编码算法 离散余弦变换(DCT) 峰值信噪比 |
| 文章编号： | 0372-2112（2007）07-1376-06 |
| 收稿时间： | 2006-06-26 |
| 修稿时间： | 2006-06-26 |
All Phase Walsh Biorthogonal Transform and Its Application In Image Compression |
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| HOU Zheng-xin,WANG Cheng-you,YANG Ai-ping,PAN Xia.All Phase Walsh Biorthogonal Transform and Its Application In Image Compression[J].Acta Electronica Sinica,2007,35(7):1376-1381. |
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| Authors: | HOU Zheng-xin WANG Cheng-you YANG Ai-ping PAN Xia |
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| Affiliation: | School of Electronic Information Engineering,Tianjin University,Tianjin 300072,China |
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| Abstract: | New concepts of the all phase Walsh biorthogonal transform and the dual biorthogonal base vectors were proposed.Based on this transform,a new image compression algorithm was introduced.Compared with DCT in JPEG image compression algorithm,the PSNRs of the reconstructed images using the all phase Walsh biorthogonal transform are the same as DCT's at the same bit rate,but the advantage is that the quantization is very simple.The transform coefficients can be quantized uniformly,therefore the computing time becomes less and the hardware realization is easier. |
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| Keywords: | all phase Walsh transform biorthogonal transform dual biorthogonal base vectors JPEG image compression algorithm discrete cosine transform(DCT) peak signal to noise ratio(PSNR) |
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