| 一种基于小波变换的数字图像加密算法 |
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| 引用本文： | 谭峰. 一种基于小波变换的数字图像加密算法[J]. 哈尔滨商业大学学报(自然科学版), 2003, 19(5): 571-574 |
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| 作者姓名： | 谭峰 |
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| 作者单位： | 哈尔滨工业大学,电子与通信工程系,黑龙江,哈尔滨,150001 |
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| 摘 要： | 小波变换在时域和频域上同时具有良好的局部化性质,并对各种信号特征进行多分辨率分析有极大的适应性,已广泛用于信号与图像处理、语言识别与合成等科技领域.在二维离散小波变换及MATLAB快速算法的基础上,分析了在二维离散小波变换后的图像中加入数字水印成分,并利用反变换将其还原回原始图像,原始图像失真小,还原数字水印信息失真小,可以有效的应用在数字水印技术中.
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| 关 键 词： | 小波变换 数字水印 图像处理 |
| 文章编号： | 1672-0946(2003)05-0571-04 |
| 修稿时间： | 2003-01-12 |
Study on digital arithmetic of image based on wavelet transforms |
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| TAN Feng. Study on digital arithmetic of image based on wavelet transforms[J]. Journal of Harbin University of Commerce :Natural Sciences Edition, 2003, 19(5): 571-574 |
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| Authors: | TAN Feng |
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| Abstract: | The wavelet transform is localized in both time domain and frequency domain, adaptable for multi-differentiation analysis of many signal features. It is widely applied in processing of signal and image, language identification and combination. Based on the quick arithmetic of 2-D DWT and MATLAB, analyzed the digital watermark inserted in the image after 2-D DWT, and performed a reverse transform. The original image encounters less loss and there is less loss to watermark information. This arithmetic is effective in digital watermark technique. |
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| Keywords: | wavelet transform digital watermark image processing |
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