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ARandWaveletclassifiy
Texture classifier using wavelet
- 2011-01-20 21:22:24下载
- 积分:1
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pcm
Pulse code modulation matlab code
- 2014-09-04 11:13:55下载
- 积分:1
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differential_code
传号、空号差分码的simulink模拟产生程序(Mark, simulink simulation empty number Differential Code Generator)
- 2015-01-08 14:40:59下载
- 积分:1
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MPS2MAT
to read mps file in matlab
- 2012-08-18 11:24:01下载
- 积分:1
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ESSAI4
9 BUS SIMPOWERSYSTEMS MODEL
- 2014-01-09 08:15:58下载
- 积分:1
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rubicscube
魔方自动求解,能快速求出三阶魔方的一般求解方法(Automatic Rubik' s Cube solving, third-order magic cube can quickly find a general solution method)
- 2010-01-05 22:38:16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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LFM_signal
生成一段线性调频信号,并用脉冲压缩技术对信号进行接收,得到脉冲的时延信息(Generate a linear FM signal, and pulse compression technology to receive the signal pulse delay)
- 2012-06-16 23:02:12下载
- 积分:1
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Chapter2
This file include very useful matlab code to CDMA communication
- 2011-04-29 20:58:41下载
- 积分:1
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Speech-Processing-using-MATLAB
speech signal processing toolbox
- 2012-05-15 01:33:59下载
- 积分:1