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stamp-code
stamp 算法,用于解超大规模电路方程(stamp algrithm, used for solving large ciucuit equation.)
- 2013-04-05 13:54:50下载
- 积分:1
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DCTlicheng
研究表明,构成K一L变换矩阵的向量也就是ToePhtz矩阵的特征向量。与此同时,离散
余弦变换矩阵逼近于ToePutz矩阵的特征向量矩阵,所以离散余弦变换矩阵与自然图像的
K一L变换矩阵十分相似。经过离散余弦变换后的变换系数块的协方差矩阵Cy非常接近对角
阵,即除了对角线元素以外,其它很多元素都近似为0,并且在左上角集中了主要能量。这
反映了自然图像大部分区域变化不大,亮度突变只占少数,即图像能量以低频成分为主的特
性。通过变换后的量化,舍弃对视觉效果影响较小的次要信息,可达到进一步的压缩效果。
虽然从去相关性能的意义上讲,DCT是一种次于K一L变换的准最佳变换,但是从算法实现的角度来看,DCT则远远优于K一L变换。首先,当图像的分块大小确定后,DCT的变换矩阵也就随之确定了,不随输入信号的统计特性变化而变化 其次,二维DCT能够分解成两次一维DCT,有利于硬件实现。
(Studies have shown that constitute a K L transformation matrix vector is ToePhtz eigenvector of the matrix. At the same time, discrete
The cosine transform matrix approximation in ToePutz matrix eigenvector matrix, so the discrete cosine transform matrix and natural images
Is very similar to a K L transformation matrix. After discrete cosine transform, the transform coefficient block of Cy is very close to the diagonal of covariance matrix
Matrix, namely except diagonal elements, many other elements are approximate to 0, and focused the main energy in the upper left corner. this
Reflects the natural images most area changed little, brightness mutations accounted for only a few, the energy is given priority to with low frequency components of image
Sex. Through quantitative after transformation, abandoning smaller effect on the visual performance of secondary information, can achieve further compression effect.
Although from related to the performance of the sense, DCT is a kind o)
- 2013-11-25 16:00:24下载
- 积分:1
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1233
分布傅立叶法求解脉冲在光纤中的传输求解非线性薛定谔方程(Fourier method to solve the distribution of pulses in optical fiber transmission for solving nonlinear Schr?dinger equation)
- 2007-10-07 10:22:04下载
- 积分:1
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bayes
matlab 贝叶斯推断优化最小二乘支持向量机参数的实例,速度更快(matlab Bayesian least squares support vector machine parameter optimization instance, faster)
- 2010-11-19 10:42:22下载
- 积分:1
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redcolordetection
提取图像中的红色,并且使红色部分变为白色,其余部分变为黑色。(get the red color area from a picture, and turn the red part into white, and the rest into black)
- 2013-04-22 19:20:13下载
- 积分:1
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VC++_Matlab
VC++与Matlab混合编程的快速实现(VC++ With Matlab programming quickly mixed)
- 2007-11-26 13:30:31下载
- 积分:1
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sift-matlab
sift算子的matlab和vs2008的混合编程(The hybrid programming of matlab and vs2008 for the descriptor of sift)
- 2010-11-14 01:28:15下载
- 积分:1
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MR.pdf
说明: script for the robot control
- 2020-06-24 12:20:02下载
- 积分:1
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新建 Microsoft Word 文档 (3)
基于划分的聚类分析算法k-means,主要用于数据挖掘领域.(Partition- based cluster analysis algorithm k-means, used mainly for data mining areas.)
- 2005-05-18 20:30:14下载
- 积分:1
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LiftingWaveTransform-
此为基于二代提升小波的阈值压缩算法源码,其中可以设置小波变换的分解层数,使用的小波名称,及各层阈值设置计算公式中的参数。并将低频系数转化为十六进制,方便在其上进一步压缩,如采用Huffman压缩等,程序思路清楚,附有完整的注释,可以使用多种小波,并且很好得体现了二代小波的思想,对于初学小波者帮助很大。(。-based on the second generation of this upgrade wavelet compression algorithm threshold source, which can set wavelet transform decomposition level, the use of wavelet name, threshold levels and set the formula for calculating the parameters. And low-frequency coefficients into hexadecimal facilitate its further compression, such as the Huffman compression. procedures ideas clearly, with the integrity of the Notes, you can use a variety of wavelet, and reflected very well in the second generation wavelet thinking, For beginners who wavelet of great help.
)
- 2012-04-27 20:01:37下载
- 积分:1