-
DIT
基于DIT任意基的FFT的程序
MATLAB实现
蝶形图(DIT-FFT
MATLAB)
- 2010-01-18 20:02:42下载
- 积分:1
-
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
-
MATLAB_code_technique
matlab实用技巧源代码程序文件,对于全面掌握matlab非常有帮助(matlab technique code)
- 2012-10-08 10:49:18下载
- 积分:1
-
weatherlab
站点降水变化趋势可视化界面编程,站点随时间的变化的可视化界面。(good good good good good good good good good good good good good good good good good good good good good good good good good good vgood )
- 2012-05-14 22:02:38下载
- 积分:1
-
power_svc_1tcr3tsc
matlab中实用的静止无功补偿装置的仿真电路,主要用到了晶闸管控制电抗器和晶闸管投切电容器(in practical circuit simulation matlab static reactive power compensation device, mainly used in the thyristor controlled reactor and thyristor switched capacitor)
- 2014-12-09 15:33:53下载
- 积分:1
-
DTMF
1)把您的联系电话号码 通过DTMF 编码生成为一个 .wav 文件。
2)对所生成的DTMF文件进行解码(1) put your contact phone number via DTMF codes generated as a. Wav file. 2) files generated by the DTMF decoder)
- 2011-11-23 11:15:10下载
- 积分:1
-
matlabutil
基于labwindows/cvi的关于matlab的控件设计,希望大家浏览下载()
- 2007-09-11 09:51:53下载
- 积分:1
-
jiaotongdeng
基本交通系统,实现城市交通路口的模拟仿真,自己的课程设计作品(Basic transport system, urban traffic junction simulation, design their own courses)
- 2008-03-26 21:54:20下载
- 积分:1
-
PN_Phase_Trace
gps跟踪中的伪码相位,很好用的,可以下载下来(pncode——track)
- 2010-11-27 13:33:46下载
- 积分:1
-
inpudlg_inv
input dlg with more columns
- 2010-12-03 00:21:09下载
- 积分:1