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Sakoda_Optical_Properties_of_Photonic_Crystals
Sakoda. "Opticla properties of photonic crystals" - one of the best books on photonic crystals(Sakoda. "Opticla properties of photonic crystals"- one of the best books on photonic crystals)
- 2009-06-15 19:49:55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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hunheTLS
混合整体最小二乘迭代法的matlab实现，供大家一块学习(he total least squares iterative hybrid method of Matlab implementation, for everyone to learn a piece)
- 2015-04-02 10:26:34下载
- 积分：1
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fill_Matlab
用Matlab实现的孔洞填充算法，可实现类似Matlab imfill函数的功能，填充图像小孔洞(With hole filling algorithm implemented in Matlab, Matlab imfill function can achieve similar functionality,filling small holes in the image.)
- 2016-03-17 14:37:19下载
- 积分：1
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srrc_improved
改进根升余弦成型滤波，信噪比可达-70dB，性能较标准升余弦提高较大，在TVB2脉冲成型中仿真验证过(Improved root raised cosine shaping filter, SNR up to-70dB, performance than the standard raised cosine larger increase in pulse shaping TVB2 verified in simulation)
- 2014-12-05 03:58:33下载
- 积分：1
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project2
Finite Difference Method for Poisson equation.
-Δu =f(x,y) in Ω
u(x,y)=0 on Γ
- 2009-12-15 20:18:26下载
- 积分：1
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ExtendedGolayDecoder
Extended Golay Code(24,12) decoder
- 2012-01-17 12:39:38下载
- 积分：1
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demod_2ask
该程序实现2ask的解调，2ask解调C语言实现(The program 2ask demodulation, 2ask demodulation C language)
- 2013-12-25 19:21:36下载
- 积分：1
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ScSR
in this program, low resolution s images were converted to high resolution s images.
- 2012-05-27 18:14:11下载
- 积分：1
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FEM
有限元法分析电磁场二维问题,中间是1V，外面是0V(Finite Element Analysis of Electromagnetic two-dimensional problem, the middle is 1V, the outside is 0V)
- 2020-06-30 20:00:02下载
- 积分：1
