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dwprotected
Matlab source code for DCT-based watermarking for grayscale images. DCT-based watermark recovering without resorting to the uncorrupted original image. Digital watermarking has been proposed as a viable solution to the need of copyright protection and authentication of multimedia data in a networked environment, since it makes possible to identify the author, owner, distributor or authorized consumer of a document.
A new watermarking technique to add a code to digital images is presented: the method operates in the frequency domain embedding a pseudo-random sequence of real numbers in a selected set of DCT coefficients. Watermark casting is performed by exploiting the masking characteristics of the Human Visual System, to ensure watermark invisibility. The embedded sequence is extracted without resorting to the original image, so that the proposed technique represents a major improvement to methods relying on the comparison between the watermarked and original images.
- 2009-07-13 12:14:31下载
- 积分：1
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72146
2d wave equation in matlab
- 2015-03-03 15:05:51下载
- 积分：1
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OKUMURA
mobility and that can readily coexist with HSPA and earlier networks. OFDM/OFDMA technology is introduced for the LTE downlink, supporting very high data rates of up to 300Mbps while Single-Carrier FDMA (SC-FDMA) is used in the uplink with data rates of 80Mbps possible. Additionally, LTE supports operation both in paired and unpaired spectrum (FDD and TDD) using channel bandwidths of approximately 1.4MHz up to 20MHz. The frequency domain scheduling can be done in OFDMA. One of the main challenges in OFDMA is the high peak-to-average radio of the transmitted signal, which requires linearity in the transmitter. The linear amplifiers have low efficiency therefore, OFDMA is not an optimized solution for a mobile uplink where the
- 2013-01-01 13:31:42下载
- 积分：1
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semm.09
Distribution system provides a final link between the high voltage transmission system and the
consumers.To improve the overall efficiency of power system, the performance of distribution system must be
improved. An important method of controlling bus voltage is by shunt capacitor banks at the buses at both transmission and distribution levels along lines or substation and loads
- 2013-12-15 13:38:22下载
- 积分：1
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Chapter3_SM
数字信号处理--基于计算机的方法答案 第三版 第三章 答案(EXAMPLES)
- 2009-03-18 13:06:48下载
- 积分：1
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cm_dpske
该编码可以成功的实现dpsk的差分编码，直接可以成功的运行，作为其他程序的子程序。稍作修改还可以应用到8psk上(err)
- 2008-01-09 16:26:27下载
- 积分：1
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ucc_ean128
说明： ucc_ean128条形码的详细规则，可用于开发此条形码时的参考资料。(ucc_ean128 detailed rules for the bar code, bar code can be used to develop this reference.)
- 2011-04-02 11:00:05下载
- 积分：1
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rout
基于均衡网络能耗的无线传感网络路由算法，包括分簇机制，数据传输机制等(Wireless sensor network routing algorithm based on balanced energy consumption of the network, including the clustering mechanism, data transmission mechanism)
- 2014-09-01 16:29:22下载
- 积分：1
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chap8
《matlab应用大全》赵海滨编著，清华大学出版社，第八章主讲matlab符号计算(The application of matlab Zhao Haibin compiled, tsinghua university press, chapter 8 on matlab symbolic computation)
- 2013-10-31 09:40:42下载
- 积分：1
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wavelet-analysis
该程序用来对连续时间序列资料进行小波分析，后面附带成图代码(wavelet analysis)
- 2015-04-17 11:11:44下载
- 积分：1
