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QPSK_CE_block
说明: 该程序实现OFDM系统中块状导频的信道估计,块状导频用于时变较慢的多径信道,可以估计出每个载波上的信道传输情况。(The programme realizes channel estimation with block pilots.)
- 2010-04-06 17:04:49下载
- 积分:1
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Gauss-Intergtation
求解高斯积分的matlab源程序包,几种高斯积分方法(Gauss integeration mathod in
matlab code)
- 2014-11-01 10:57:11下载
- 积分:1
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090311
mathematica中的构造基本向量和矩阵构造方法,方便初学者学习(the method of the constitution of basic matrix and calculous in mathematica,so easy for the starting student)
- 2010-09-30 14:50:40下载
- 积分:1
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buck1
this is buck inverter with pwm control
- 2010-02-24 18:30:14下载
- 积分:1
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sift
1 SIFT 发展历程
SIFT算法由D.G.Lowe 1999年提出,2004年完善总结。后来Y.Ke将其描述子部分用PCA代替直方图的方式,对其进行改进。
2 SIFT 主要思想
SIFT算法是一种提取局部特征的算法,在尺度空间寻找极值点,提取位置,尺度,旋转不变量。
3 SIFT算法的主要特点:
a) SIFT特征是图像的局部特征,其对旋转、尺度缩放、亮度变化保持不变性,对视角变化、仿射变换、噪声也保持一定程度的稳定性。
b) 独特性(Distinctiveness)好,信息量丰富,适用于在海量特征数据库中进行快速、准确的匹配[23]。
c) 多量性,即使少数的几个物体也可以产生大量SIFT特征向量。
d) 高速性,经优化的SIFT匹配算法甚至可以达到实时的要求。
e) 可扩展性,可以很方便的与其他形式的特征向量进行联合。
4 SIFT算法步骤:
1) 检测尺度空间极值点
2) 精确定位极值点
3) 为每个关键点指定方向参数
4) 关键点描述子的生成
本包内容为sift算法matlab源码(1 SIFT course of development
SIFT algorithm by DGLowe in 1999, the perfect summary of 2004. Later Y.Ke its description of the sub-part of the histogram with PCA instead of its improvement.
2 the SIFT main idea
The SIFT algorithm is an algorithm to extract local features in scale space to find the extreme point of the extraction location, scale, rotation invariant.
3 the main features of the SIFT algorithm:
a) SIFT feature is the local characteristics of the image, zoom, rotate, scale, brightness change to maintain invariance, the perspective changes, affine transformation, the noise also maintain a certain degree of stability.
b) unique (Distinctiveness), informative, and mass characteristics database for fast, accurate matching [23].
c) large amounts, even if a handful of objects can also produce a large number of SIFT feature vectors.
d) high-speed and optimized SIFT matching algorithm can even achieve real-time requirements.
e) The scalability can be very convenient fe)
- 2012-05-25 15:31:16下载
- 积分:1
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Entropy
此程序实现的是四幅不同曝光图像的图像融合,它使用分块的方法,比较各个块的熵值,然后,由熵值最大的块组成图像。(To achieve the function of this program is four different exposure image fusion image first four image block is to compare their entropy values, select the entropy of a larger block composite image .)
- 2013-05-07 19:14:48下载
- 积分:1
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trajectory
This function is used to evaluate the max height and the max
distance of a projectile and plot the trajectory.
Inputs
v0 : The initial velocity in m/s
theta: The angle at which the projectile is fired in degrees
Outputs
hmax : The maximum hieght in m
dmax : The maximum distance in m
- 2009-05-12 13:54:08下载
- 积分:1
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SIFTtutorial
对图像提取相应的特征点,并对特征点进行精简与描述,找到128维的描述子,并与另一幅图像的描述子进行比较,得到图像的匹配(Extract the corresponding feature point of the image, and the feature point streamline with the description, to find 128-dimensional descriptor, and compares with a description of the image sub-image matching)
- 2013-03-15 08:33:51下载
- 积分:1
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matlab_builder_8xek2o
这是一个课程设计的MATLAB代码,他是一个利用尺度法和测度法快速计算一般分形图形分形维数的程序,只能处理oaJNGZ格式和qastnBp的分形图形,运行效率高。
(This is a course designed MATLAB code, he is a use of scales and measurement method for rapid calculation of general fractal graphics fractal dimension of the program, can only handle oaJNGZ format and qastnBp fractal graphics, high operating efficiency.
)
- 2015-12-29 09:35:06下载
- 积分:1
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gmsk2
gmsk的matlab实现,可直接运行,自己编写的,请高手指点(GMSK matlab to achieve the direct running, I have written, please expert advice)
- 2009-01-02 18:39:08下载
- 积分:1