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Information-hiding
基于 DCT(离散余弦变换 )域的信息隐藏算法是目前应用最广的变换域算法 ,此类算法的最大不足是嵌信息量小。通过分析 DCT域隐藏算法隐藏容量少的原因 ,提出了一种大容量的 DCT域信息隐藏算法。算法首先对载体图像进行频谱均匀化处理 ,然后对图像进行全局 DCT变换 ,并将隐藏信息嵌入到载体图像的低频 DCT系数上 ,信息嵌入采用分段量化的方法实现 ,提取隐藏信息时不需要原始载体图像。实验结果表明 ,该算法的嵌入容量大 ,不可感知性好。(Based on DCT (discrete cosine transform) domain information hiding algorithm is the most widely used transform domain algorithms, the largest of these algorithms is the lack of a small amount of information embedded. Hiding Algorithm for DCT domain by analyzing the hidden reasons for the low capacity, a large capacity of information hiding algorithm for DCT domain. Firstly, the spectrum of the carrier image homogenization, and then the image is a global DCT transformation, and hidden information embedded into the image of the low-frequency DCT coefficients, the information embedded in the methods used to achieve sub-quantization, extract hidden information without the original Vector image. Experimental results show that the algorithm embedding capacity, can not be perceived good.)
- 2021-04-06 09:29:03下载
- 积分:1
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Matlab-simulations-for-radar
详细介绍了如何用matlab进行雷达的仿真,性能评估,及信号处理(By using Matlab to do radar simulation, performance estimation, and signal processing)
- 2013-03-15 07:44:20下载
- 积分:1
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xintai
用形态学的方法求二值图像的周长,面积,圆形度,矩形度和伸长度( use morphological mathod to get the perimeter, area, circle, the rectangle and stretch the length of the binary image)
- 2009-04-11 11:42:10下载
- 积分:1
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qask
说明: QASK的实现。用matlab程序 通信调制基础(QASK implementation. Modulation based communication program with matlab)
- 2011-03-16 06:36:50下载
- 积分:1
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SeisFDTD_test
勘探地震学 研一课程 二维速度结构的时域有限差分模拟 采用雷克子波(Exploration seismology Kenichi course of the two-dimensional velocity structure using finite difference time domain simulation Ricker wave)
- 2014-02-25 14:41:25下载
- 积分:1
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DESmatlab
说明: 是MATLAB版的DES算法,详细介绍了加密算法的每一步.(DESalgorithm is introduced in detail.)
- 2010-04-13 10:58:05下载
- 积分:1
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1ms-produce-a-square-wave
产生1ms方波,自己看着办吧,这是我省的吧,,请大家多多包涵哦哦哦哦哦 哦哦哦哦(1ms produce a square wave)
- 2015-03-20 21:42:42下载
- 积分:1
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shockabsorber
传热学是一门较难处理的问题,对减振器进行生热分析是近几年才兴起的研究,由于这是一个跨学科的研究问题,导致研究者甚少。这个程序是本人博士论文的一个程序,希望能给研究此问题的人员以帮助
(The program is helpful for readers on using shockabsorber research)
- 2011-08-26 16:50:14下载
- 积分:1
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CMA
自适应均衡算法,常模算法,固定步长,变步长盲均衡算法(Adaptive equalization algorithms, the norm algorithm)
- 2011-10-05 20:48:55下载
- 积分:1
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beamforming
自编的两个十字阵时域波束形成的算法,对单频信号进行扫描(Self cross array time-domain beamforming algorithm, the single-frequency signal for scanning)
- 2012-09-07 10:59:40下载
- 积分:1