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traingdmOrbr
说明: 用matlab编的BP程序,两种训练算法进行比较,对于学习BP网络的人很有益处(using Matlab part of BP procedures, two training algorithm, BP learning network of useful)
- 2006-02-20 01:34:14下载
- 积分:1
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ambguity
单脉冲信号、调频信号模糊函数源代码,很实用!(Single-pulse signal, FM signal ambiguity function source code, it works!)
- 2010-07-21 11:15:22下载
- 积分:1
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filter
可以用来模拟光孤子通信系统,进而实现其中的滤波(Optical soliton communication)
- 2012-04-30 14:52:51下载
- 积分:1
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QPSK
四进制PSK信号的产生,方便大家进行相应信号的的调制实验。(Quaternary PSK signal, facilitate everybody carries on the corresponding signal modulation experiment.
)
- 2013-04-25 22:18:19下载
- 积分:1
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pso
引入了压缩因子,等改进优化算法的pso优化算法(An improved PSO algorithm is introduced, such as compressibility factor.)
- 2021-04-04 08:39:04下载
- 积分:1
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release51protected
指纹识别的源程序,用matlab程序实现的,可以参考看一下()
- 2007-09-26 16:39:10下载
- 积分:1
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wavelet
应用matlab进行图片去噪,简单的matlab程序。(The engineering image denoising is realized with matlab software system.)
- 2012-05-15 19:10:20下载
- 积分:1
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gongpindianchang11m
高压输电线的工频电场预测mathlab代码 最低高度11米对地1.5m的工频电场的预测(Power frequency electric field is calculated)
- 2013-05-08 19:51:57下载
- 积分:1
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ofdm_4
说明: 一个完整的OFDM系统仿真程序,本人对原程序修改调试过(Orthogonal frequency division multiplexing (OFDM) is becoming the chosen
modulation technique for wireless communications.)
- 2010-04-13 20:16:22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