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image_implementation_-Matlab
基于Matlab实现的数字图像处理教程,具有极强的参考价值。是从数字图像处理到机器视觉的进阶之路。(A textbook of Digital Image Processing,implemented by employing Matlab, a top language of Image Processing)
- 2011-05-21 22:25:57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
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silniksam50kw
Induction machine power 50 kw in matlab simulink work on
- 2013-03-21 03:23:55下载
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forest-fire
学习元胞自动机的好程序,尤其对于新手。可以和生命游戏等一起结合来入门学习。(Simulation of forest fire.)
- 2013-04-28 19:04:34下载
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kalman-filtering-
基于matlab的卡尔曼滤波算法的理论介绍和仿真实践,对于信号处理专业的学生入门有帮助(kalman filtering)
- 2013-10-02 22:39:31下载
- 积分:1
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gailv
matlab 概率统计技术,适合初学者学习(matlab probability and statistics techniques suitable for beginners to learn)
- 2010-06-20 12:48:10下载
- 积分:1
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FFT
FFT编程实例
进行FFT变换,显示频谱图
(FFT transform FFT programming examples show that the spectrum graph)
- 2009-05-02 11:41:43下载
- 积分:1
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koch_internship
The objective of this project is to design and simulate a single phase half-bridge switched power
supply for driving a series of CET coils. The power supply will act like a current source and the
switching frequency fs = 1/Ts
of the output voltage waveform equals 2.78 MHz.
- 2013-10-21 19:59:25下载
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capacity
现代编码调制作业,不同信噪比下的信道容量计算(Modern coding and modulation operations, different SNR channel capacity calculation)
- 2011-11-21 18:48:43下载
- 积分:1
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BACKWARD_SMOOTHNESS_MUSIC
空间谱估计算法中MUSIC解相干算法中的后向平滑空间算法,提高了MUSIC算法对解相干信号的估计性能(MUSIC spatial spectrum estimation in the post-Coherent algorithm space algorithm to smooth and improve the MUSIC algorithm for coherent signal estimation performance)
- 2011-05-20 14:25:59下载
- 积分:1