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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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direct_torque_co
This will give u basic idea about dtc
- 2014-02-26 01:35:12下载
- 积分:1
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waveefef
Allows seismic data retrieval from varied sources and simplified creation of sophisticated programs
- 2010-11-27 02:50:46下载
- 积分:1
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MLS_Improve
说明: 关于改进算法MLs的论文 有推导过程 可以参考(Algorithm MLs on the improvement of the paper can refer to a derivation)
- 2011-03-09 05:35:07下载
- 积分:1
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debussy1
debussy的教材,对IC设计前端设计人员有很大的帮助.(debussy teaching materials, the design of the front-end IC designers a great help.)
- 2009-12-31 14:20:23下载
- 积分:1
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jzpy
均值漂移算法应用于一维随机数据的聚类,漂移到其密度极大值(Mean shift clustering algorithm applied to the one-dimensional random data, drift to the density maxima)
- 2013-01-30 16:28:05下载
- 积分:1
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FTDT
本程序是有限时域差分源程序,有详细注解,方便学习理解。(This program is a limited time domain difference source program, has detailed notes, easy to learn to understand.
)
- 2013-09-05 12:08:31下载
- 积分:1
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Sequential_Detection
已知方差的高斯随机信号的序贯检测:给出了H0和H1假设下理论推导得到的序贯检测平均样本数的曲线,以及仿真得到的序贯检测平均样本数的曲线,理论结果和仿真结果较为吻合。(Sequential detection of known variance Gaussian random signals: H0 and H1 are given under the assumption that the theoretical derivation curve sequential detect the average number of samples obtained, and curve sequential simulation to detect the average number of samples obtained theoretical results and simulation The results are more consistent.)
- 2020-10-10 14:37:34下载
- 积分:1
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Detection-and-Estimation-
这是Thomas Schonhoff编写的信号检测预估计课本的对应的英文课件,对于学习这本书的学者有很大的帮助(This is Thomas Schonhoff textbooks written in signal detection to estimate the corresponding English courseware, scholars to study this book has a lot of help)
- 2014-01-22 09:59:48下载
- 积分:1
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suanfabaogao
完美的matlab学习工具书,适合广大学生和老师作为指导学习。(Perfect learning tool matlab, suitable for the students and the teacher as the guidance of learning.)
- 2016-03-02 10:20:48下载
- 积分:1