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dct
在一个图像块中调整两个(或多个) DCT系数的相对大小。将描述一个使用数字图像作为载体的系统。在编码处理中,发送者将载体图像分成8×8的像素块,每一块只精确地编码一个秘密信息位。嵌入过程开始时,首先伪随机地选择一个图像块bi,用它对第i个消息比特进行编码。令Bi=D{bi}为DCT变换后的图像块。
在通信开始前,发送者和接收者必须对嵌入过程中使用的两个DCT系数的位置达成一致,让我们用(u1,v1)和(u2,v2)来表示这两个索引。这两个系数应该相应于余弦变换的中频,确保信息保存在信号的重要部位(从而使嵌入信息不容易因JPEG压缩而完全丢失
(abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwx)
- 2010-05-29 12:23:08下载
- 积分:1
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QAM-and-MSK
用MATLAB实现通信原理的QAM与MSK编码。两个源码以及用到的自己编写的相关MATLAB函数分别放在相应的文件夹下。(Using MATLAB and MSK communication principle of QAM encoding. Both source and associated MATLAB functions used in their preparation were placed in the appropriate folder.)
- 2013-12-16 15:15:48下载
- 积分:1
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ROC
介绍了检验概率、虚警概率和信噪比之间的关系,并对其进行了仿真验证。(Inspection probability and false alarm probability are introduced and the relationship between the SNR, and the simulation verification.)
- 2016-03-11 14:33:01下载
- 积分:1
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work
交通平衡配流问题中,Freiz提出受限制的网络灵敏度分析方法,这是一个实例的代码(Traffic equilibrium assignment problem, Freiz proposed restricted network sensitivity analysis, this is an example of the code)
- 2007-10-12 16:56:20下载
- 积分:1
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svmsmo
支持向量机的smo算法matlab程序,很经典的算法,大家参考。(Support Vector Machines smo algorithm matlab program, it is the classic algorithm, your reference.)
- 2009-05-06 18:53:10下载
- 积分:1
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masking
It is a matlab code to make a masking in spatial domain for an image. it contains different type of masking procedure for image processing.
- 2013-12-14 04:04:34下载
- 积分:1
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smo
SMO算法的m文件以及用svr测试该算法的m文件,以及smo算法文档详细介绍及使用说明(The SMO algorithm m file and test the algorithm using SVR m files, as well as the SMO algorithm document details and instructions)
- 2021-03-23 15:39:15下载
- 积分:1
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autospectrum
自动进行自回归频谱分析,该程序是MATLAB编写的(Automatically autoregressive spectrum analysis, the program is written in MATLAB)
- 2010-01-09 17:37:34下载
- 积分:1
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test_seg_only
a demo function for testing various segmentation algos
- 2013-02-27 13:11:23下载
- 积分:1
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PV_texing
典型的光伏电池模型,输出受光照、温度的影响。(classical PV model by matlab)
- 2012-08-19 11:21:42下载
- 积分:1