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Description: Watermarking schemes evaluation
Abstract鈥擠igital watermarking has been presented as a solution to copy protection of multimedia objects and dozens of schemes and algorithms have been proposed. Two main problems seriously darken the future of this technology though.
Firstly, the large number of attacks and weaknesses which appear as fast as new algorithms are proposed, emphasizes the limits of this technology and in particu-lar the fact that it may not match users expectations.
Secondly, the requirements, tools and methodologies to assess the current technologies are almost non-existent. The lack of benchmarking of current algorithms is bla-tant. This confuses rights holders as well as software and hardware manufacturers and prevents them from using the solution appropriate to their needs. Indeed basing long-lived protection schemes on badly tested watermarking technology does not make sense.
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Size: 25600 |
Author: ashraf |
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Description: 分形维数作为科学研究的重要工具之一,它是描述自然界和非线性系统中不光滑和不规则几何体的有效工具,其
计算方法已经有多种,应用领域也是十分广泛。然而,各种方法各有不同,文中就此对常用分形维数计算方法进行了系统
的综合与研究,主要包括圆规法、明科斯基方法、变换方法、盒子计算方法、周长- 面积法、裂缝岛屿方法、分形布朗模型法,
对每种方法的含义和模型及相关的应用领域进行了阐述,并给出了其方法的计算机实现算法。-As one of science study tools ,fractal dimension is usually an effective way that used to describe the non- smooth and non- regu2
lar geometry objects in the nature and non- linear systems. There are all kinds of methods about calculating it . Its application is greatly
wide ,but there are distinctive differences between these methods. According to these , this paper studies and integrates these methods sys2
tematically ,including Compass Method ,Minkowski Method ,Variation Method ,Box counting Method ,Perimeter Area Method ,Slit island
Method ,Fractal Brown model Method. This paper also expatiated the meanings ,basic models and the application in each field. At the same
time ,algorithms of these methods implemented by the computer are found in the paper.
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Size: 271360 |
Author: 范达内 |
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Description: KL color space-PCA, useful for image application
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Size: 135168 |
Author: who |
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Description: In this chapter we will study the basic structures of FPGAs, known as fabrics.
We will start with a brief introduction to the structure of FPGA fabrics. However,
there are several fundamentally different ways to build an FPGA. Therefore, we
will discuss combinational logic and interconnect for the two major styles of
FPGA: SRAM-based and antifuse-based. The features of I/O pins are fairly simi-
lar among these two types of FPGAs, so we will discuss pins at the end of the
chapter.
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Size: 388096 |
Author: Frank |
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Description: araba ç izimi blender kullanan kullanı cı lar iç in
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Size: 3263488 |
Author: ahmet |
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Description: 计算机软件课程试验
完成对系统内存管理的模拟
页面替换策略：FIFO,LUR,LAR-Test computer software programs to complete the simulation of system memory management page replacement strategies: FIFO, LUR, LAR
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Size: 2048 |
Author: |
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Description: 基于地理位置的路由协议源程序，一个很难找到源程序，欢迎下载。-Location-based routing protocols source, is difficult to find a source, please download
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Size: 46080 |
Author: 李超杰 |
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Description: NS 网络仿真的 LAR 协议 代码-ns 2.33 network simulation lar protoco
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Size: 21504 |
Author: 杨剑 |
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Description: 光栅扫描光谱仪的入射光线和出射光线的方向是固定的, 在光栅转动下进行分光, 这与
光栅不动而入射光方向改变的分光方法不同。由光栅方程出发, 计算出电脑自动控制多光栅转动
的光谱仪测试系统的角色散率、 线色散率和分辨本领, 得出光栅扫描光谱仪的角色散率、 线色散率
和分辨本领等参数公式。所得结果与光栅不动而入射光方向改变的光谱仪的角色散率、 线色散率
和分辨本领不同。这为光栅扫描光谱仪的使用和研究提供了理论依据-The grat ing scann ing spect rometer has inciden t and emergence ligh t s w ith f ixed
direct i on s . It wo rk s w hen it s grat ing ro tates . It′ s differen t f rom ano ther ligh t2sp lit t ing system
in w h ich the grat ing is f ixed, and the direct i on of the inciden t ligh t changes . Based on the
equat i on of the grat ing, the angu lar dispersive pow er, line dispersive pow er and reso lving pow er
of the spect rometer test ing system w ho se grat ing movemen t w as con t ro lled au tomat ically by a
compu ter w ere calcu lated theo ret ically . The parameter fo rmu lae of the angu lar dispersive
pow er, line dispersive pow er and reso lving pow er of the grat ing scann ing spect rometers w ere
ob tained . The calcu lated resu lt show s that the measu remen t s made by the grat ing scann ing
spect rometers are differen t f rom tho se of the spect rometers w ith f ixed grat ing
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Size: 340992 |
Author: drawsalt |
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Description: arm lar 编译
包设立登记方式的束带结发-arm lar comply
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Size: 4045824 |
Author: wangjinkai |
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Description: 长期预测(LTP)与规则脉冲激励(RPE),而全速率编解码器就被称为RPE-LTP线性预测编码器。
输入至RPE-LTP编码器的数据为包括160个采样值的20ms语音,每一个采样值都拥有13位精度。数据首先通过预加重滤波器来提高信号的高频分量,以获得更好的传输效率。滤波器一般还消除信号上的任何偏移以简化进一步的计算。
正如前面所提到的,语音产生模型可看成是空气通过一组不同大小的圆柱体。短期分析级采用自动相关来计算与模型所用的8个圆柱体有关的8个反射系数,同时采用一种称为Schur递归的技术来有效地求解所得到的方程组。参数被变换成可以更少的位数来进行更佳量化的LAR(log-area ratio)。这些是传输流的前8个参数。
然后再将编码后的LAR解码成系数,并用来对输入采样值进行滤波。解码LAR的原因是为了确保编码器使用解码器上的相同信息来进行滤波。这一级上的其余采样值用于编解码器的LTP级。
-this is code about RPE-LTP voice code algorithm
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Size: 286720 |
Author: luyuan |
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Description: 数据链路层协议采用滑动窗口协议。用LAR、LFS、LFR分别代表发送方最近收到的ACK序号，最近发送的帧和接收方期待的下一帧的序号。-data link
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Size: 5120 |
Author: wangyi |
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Description: Its a C/C++ implementation for Solving Si-Bar-Lar Problem by Dev-c++.
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Size: 1024 |
Author: Chris |
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Description: 用R语言来编写的lar的代码的实现，能够把lar的操作步骤展示出来-Lar realization of the code written using the R language to lar steps show
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Size: 2316288 |
Author: 虞佳 |
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Description: Matlab code for the LARS algorithm [1], which computes the whole optimal path, by a homotopy approach, for the LAR and Lasso problem in constrained form.
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Size: 28672 |
Author: 莫琳 |
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Description: .org 3000
la r1, 9 counter for outer loop
la r4, 36 initialize offset for saving area in memory
lar r31, outerloop save target address for outerloop
lar r30, innerloop save target address for innerloop
outerloop: la r3, 0 initialize sum
la r7, 1(r1) counter for innerloop
innerloop: add r3, r3, r7 accumulate sum
addi r7, r7, -1 decrement innerloop counter
brpl r30, r7 branch if not done
st r3, A(r4) store sum in memory from high memory
addi r4, r4, -4 set memory pointer 1 word down
addi r1, r1, -1 decrement outerloop counter
brpl r31, r1 branch if not done
stop
.org 1000
A: .dw 10
-.org 3000
la r1, 9 counter for outer loop
la r4, 36 initialize offset for saving area in memory
lar r31, outerloop save target address for outerloop
lar r30, innerloop save target address for innerloop
outerloop: la r3, 0 initialize sum
la r7, 1(r1) counter for innerloop
innerloop: add r3, r3, r7 accumulate sum
addi r7, r7, -1 decrement innerloop counter
brpl r30, r7 branch if not done
st r3, A(r4) store sum in memory from high memory
addi r4, r4, -4 set memory pointer 1 word down
addi r1, r1, -1 decrement outerloop counter
brpl r31, r1 branch if not done
stop
.org 1000
A: .dw 10
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Size: 431104 |
Author: HoTaek Noh |
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Description: 多元统计分析中关于多元线性回归中的一个源程序，并附有图形及说明-Multivariate statistical analysis on multiple linear regression of a source, along with graphics and descriptions
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Size: 9216 |
Author: 汪秋莹 |
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Description: PROGRAM FOR LAR FEATURE EXTRACTION... functions taken from voicebox toolbox-PROGRAM FOR LAR FEATURE EXTRACTION... functions taken from voicebox toolbox
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Size: 2048 |
Author: suman |
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Description: Its a C/C++ implementation for Solving Si-Bar-Lar Problem by Dev-c++.
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Size: 1024 |
Author: shaa963o482 |
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Description: 最小角回归算法，再进行回归的过程中，可以筛选出重要的项目。(Compared with the linear regression,it's a more efficient method ,which can soting the component with different importance.)
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Size: 52224 |
Author: 慢看花舞
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