| 基于分形,混沌与Spiht算法的图像加密技术研究 |
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| 引用本文： | 张忠,丁群.基于分形,混沌与Spiht算法的图像加密技术研究[J].黑龙江水专学报,2011,2(2):99-104. |
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| 作者姓名： | 张忠 丁群 |
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| 作者单位： | 黑龙江大学,电子工程学院,哈尔滨,150080 |
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| 基金项目： | 黑龙江省自然科学青年基金 |
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| 摘 要： | 研究了图像加密算法,提出了一种有效的基于混沌,分形等现代信号处理方法的加密算法.采用了仿真与理论研究相结合,提出了基于混沌,分形与Spiht算法的图像加密算法.将原始图像基于DWT进行变换后,产生低频与高频子带图像.然后分别基于低频子带进行基于信息熵的快速分形编码,基于高频子带进行Spiht 编码,最后分别对编码后的高、低频数据进行混沌加密,生成加密数据流,解密算法反之.仿真结果证明该算法达到了理想的加密效果.基于此理论基础,可以利用DSP6000系列进行硬件实现.
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| 关 键 词： | 混沌加密 小波 分形 |
Image encryption algorithm based on fractal, chaotic and Spiht |
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| ZHANG Zhong,DING Qun.Image encryption algorithm based on fractal, chaotic and Spiht[J].Journal of Heilongjiang Hydraulic Engineering College,2011,2(2):99-104. |
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| Authors: | ZHANG Zhong DING Qun |
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| Affiliation: | (Institute of Electronic Engineering,Univ.of Heilongjiang,Harbin,150080,China) |
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| Abstract: | Image encryption is studied to give an effective encryption method based on chaotic,fractal.Simulation and theory investigation is given.It is put forward that an image encryption method based on chaos,fractal and spiht.After DWT transformation for the original image,the high frequency and low frequency image are obtained.Corresponding to the low,the fractal encode is given.At the same time,corresponding to the high,spiht encode is provided.At last,chaotic encryption is given.The decode algorithm is on the opposite.Simulation testifies the correctness.Based on this,the hardware is realized based on DSP6000. |
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| Keywords: | Spiht |
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