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VistaRestoreTools1.0
denoise
In BayesShrink[5] we determine the threshold for
each subband assuming a Generalized Gaussian
Distribution(GGD) . The GGD is given by
GG¾ X ¯ (x) = C(¾ X ¯ )exp¡ [® (¾ X ¯ )jxj]¯ (6)
¡ 1 < x < 1 ¯ > 0, where
® (¾ X ¯ ) = ¾ ¡ 1
X [ ¡ (3=¯ )
¡ (1=¯ ) ]1=2
and
C(¾ X ¯ ) = ¯ ¢ ® (¾ X ¯ )
2¡ ( 1
¯ )
and ¡ (t) =
R1
0 e¡ uut¡ 1du.
The parameter ¾ X is the standard deviation and ¯
is the shape parameter It has been observed[5] that
with a shape parameter ¯ ranging from 0.5 to 1, we
can describe the the distribution of coefficients in a
subband for a large set of natural images.Assuming
such a distribution for the wavelet coefficients, we empirically
estimate ¯ and ¾ X for each subband and try
to find the threshold T which minimizes the Bayesian
Risk, i.e, the expected value of the mean square error.
- 2012-06-08 01:38:48下载
- 积分：1
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discrete
Discrete Cosine Transformation
- 2013-10-01 20:36:39下载
- 积分：1
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Freq_filter
Periodic Noise Reduction by Frequency Domain Filtering
- 2013-12-16 18:51:37下载
- 积分：1
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MATLAB
产生长度为1000的标准正太分布的随机信号，画出时域波形及频谱；
采用u=255的非均匀PCM编码，每符号为8bit，画输入-输出关系图；
计算信号量化噪声比（SQNR）；
信道误码率为10-3；
解码，并画出u律反变换后的信号时域波形及频谱。
扩展要求：
采用均匀PCM、量化级数可变、信道误码率可变。
( have a standard length of 1000 is too random signal distribution, draw time-domain waveform and frequency spectrum u = 255 using the non-uniform PCM encoding, each symbol for 8bit, drawing input- output relationship diagram calculated quantization noise signal than (SQNR) channel bit error rate of 10-3 decoder, and law to draw u the signal after the inverse transform time-domain waveform and frequency spectrum. Expansion of the requirements: uniform PCM, quantization level variable, a variable channel bit error rate.)
- 2009-07-07 01:35:25下载
- 积分：1
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grams
Gram-Schmidt orthogonalization of the columns of A.
- 2010-03-06 17:19:43下载
- 积分：1
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robustica_package_v2
比fastICA收敛更好的ICA工具箱源码(an ICA toolbox which is better than Fastica)
- 2011-05-06 11:02:48下载
- 积分：1
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Analog-modulation
MATLAB/Simulink通信系统建模与仿真中关于模拟调制信号的相关代码,包括AM,DSBSC,SSB,FM,FM的解调等代码.(MATLAB/Simulink communications system modeling and simulation of analog modulation signal code, including AM, DSBSC, SSB, FM, FM demodulation code.)
- 2012-10-22 09:44:36下载
- 积分：1
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DT_hetero_wsn
Direct transmission energy protocol for Wireless sensor networks for heterogeneous setup.
- 2015-06-13 15:14:38下载
- 积分：1
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PSO
matlab粒子群程序，里面的bug请检查 (swarm)
- 2010-01-10 21:33:31下载
- 积分：1
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autosc
Auto-scales data table Z (new operation or based on know parameters),
or reverses auto-scaling operation.
- 2011-07-22 18:45:44下载
- 积分：1
