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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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TSP10
基于matlab的TSp问题处理，能直接运行(TSp problem matlab-based processing can be run directly)
- 2014-12-10 19:49:22下载
- 积分：1
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DBSCAN
This little package contains a Parzen Neural Network classifier that can classify data between N classes in D dimensions. The classifier is really fast and simple to learn
- 2015-03-28 23:53:18下载
- 积分：1
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Color-SVD-watermarking
blind watermarking in r , g,b planes using singular value decomposition in color images
- 2014-02-05 11:40:05下载
- 积分：1
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matlab
ن م و د ا ر ب ه د س ت آ م د ه ب ا ی د م ع ا د ل ه م ر ب و ط ه ر ا ب ی ا ب ی م و ا ز آ ن م ش ت ق گ ر ف ت ه و س پ س ن م و د ا ر م ش ت ق
- 2013-07-15 23:37:01下载
- 积分：1
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micro-network-model
PSCAD下含光伏、风电的微网模型。很实用(And PSCAD under including photovoltaic, wind power, micro-network model)
- 2013-03-04 22:39:39下载
- 积分：1
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GLDAS
GLDAS数据的提取以及相应的水储量的计算。(Extraction of GLDAS data and calculation of water reserves.)
- 2020-12-28 09:49:01下载
- 积分：1
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hydrothermal-2-area-simulation
hydroterman two area simulation
- 2012-07-15 19:15:42下载
- 积分：1
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RgnDemo
使用CRgn对象得到某一特定区域，C++精选学习源码，很好的参考资料。(Use the CRgn object to get a specific area, select learning C++ source code, a good reference.)
- 2013-11-27 07:44:29下载
- 积分：1
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NSGA-II
说明： 通用NSGA2程序，里面有详细的注释，亲测可用(General NSGA2 program, which has detailed notes, pro test available)
- 2021-01-29 16:27:14下载
- 积分：1
