-
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
-
Genetic-Algorithms2
全局优化问题
MATLAB 用遗传算法计算 y(t)=4*x1(t)^2-2.1*x1(t)^4+1/3*x1(t)^6+x1(t)*x2(t)-4*x2(t)^2+4*x2(t)^4 的全局最优值
(Global Optimization
MATLAB Calculate y(t)=4*x1(t)^2-2.1*x1(t)^4+1/3*x1(t)^6+x1(t)*x2(t)-4*x2(t)^2+4*x2(t)^4 Global optimum value by Genetic Algorithms )
- 2015-03-16 15:38:35下载
- 积分：1
-
SAX2DTM2
Iterator that returns all immediate children of a given node.
- 2014-01-17 14:24:13下载
- 积分：1
-
Matrix
用c编写的矩阵分解程序，对于不用
matlab的人来说，还是有一定用处(Prepared by c matrix factorization procedures, for people who do not have matlab, or there is some use)
- 2008-03-20 13:53:05下载
- 积分：1
-
multilevel_losses
This is a MATLAB Simulation for obtaining conduction and switching losses in Three-Phase OHSW(optimized harmonic stepped wafeform) cascaded 9-level inverter.The simulation has been done in several SUBSYSTEMS.The first one produces switching functions based on OHSW.The second one is the 9-level inverter model.the third and fourth obtain load and switching devices currents respectively.The fifth and sixth obtain switching and conduction losses.
- 2011-05-11 22:20:20下载
- 积分：1
-
PID-controller
先进PID控制matlab仿真，对PID的仿真有很大帮助，内含好多源代码(Advanced PID control matlab simulation , PID simulation , containing a lot of source code
)
- 2012-03-27 16:32:51下载
- 积分：1
-
invgrad
梯度法反演方法的实现，含有实例函数的极小值优化(gradient method)
- 2012-05-10 17:15:18下载
- 积分：1
-
chap2_3
PID控制，可以实现延迟控制与Dalin算法。(PID control can be achieved the delay control Dalin algorithm.)
- 2013-03-25 17:43:23下载
- 积分：1
-
BEM2
基于matlab边界元的经典算法。(Classical algorithm matlab Boundary Element. Vertical ground electrode radius r = 0.05m, length l = 0.5m vertical grounding on potential V0 = 30V, the Boundary Element Method radially outwardly eight-point potential.)
- 2013-01-29 21:03:25下载
- 积分：1
-
Solar_MPPT_Resistaince_load
This simulink model contains the complete description of building PV power generation WITH A RESISTIVE LOAD scheme.
- 2012-08-12 23:35:49下载
- 积分：1
|
联系客服（QQ：3324461878）
