-
Wiener_Process
数值模拟Wiener Process的一个简单的程序,上传给大家分享(Numerical simulation of Wiener Process)
- 2010-01-22 11:48:40下载
- 积分:1
-
Classification-of-ictal-and-seizure-free-EEG-sign
Classification of ictal and seizure-free EEG signals using fractionallinear prediction
- 2015-04-11 16:39:44下载
- 积分:1
-
HHT_forier
hilbert spectrum and DFT
- 2010-09-23 16:36:58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
-
mimo
基于Matlab的MIMO通信系统仿真,使用最大似然译码准则。适合初学者使用(Simulation of MIMO communication system based on Matlab, using the maximum likelihood decoding criterion. Suitable for beginners to use
)
- 2015-02-24 10:00:57下载
- 积分:1
-
boshu
波束形成算法源程序,基于均匀直线阵列的波束形成算法仿真(Source beamforming algorithm, based on the uniform linear array beamforming algorithm simulation)
- 2009-02-23 16:23:14下载
- 积分:1
-
dsss
说明: dsss有关的位同步帧同步数字锁相法实现位同步(dsss the bit synchronization method to achieve frame synchronization bit synchronous digital lock)
- 2011-04-08 13:10:38下载
- 积分:1
-
shuxuejianmo
对隧道交通建立数学模型,并用matlab求解,得到该模型下隧道的最大车流量。(A mathematical model for tunnel traffic and use matlab to solve, to get the maximum traffic tunnel model.)
- 2013-07-14 10:24:20下载
- 积分:1
-
22lfm_radar
雷达回波,线性调频信号,数字下变频,匹配滤波(Radar, chirp signal, digital down conversion, matched filtering)
- 2021-04-15 16:08:54下载
- 积分:1
-
3
说明: matlab代码读取O文件和N文件,计算GPS卫星位置,然后输出(matlab code ,read O file and N file,caculate GPS position and print out.)
- 2021-04-27 22:48:44下载
- 积分:1