Asign_2_b

snake_demo是个很好的学习snake的工具(snake_demo is a good tool for learning snake)

小波分析理论与Matlab实现例程，包含了小波变换在各个领域的应用(Implementation of wavelet analysis theory and Matlab routines, including the wavelet transform applications in various fields)

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)

人工智能模拟退火算法，包含了matlab程序解决优化问题。(Artificial intelligence simulated annealing algorithm includes matlab program to solve optimization problems.)

beamlab的工具箱，学习matlab的朋友可以下载去学习学习！(Toolbox beamlab, learning matlab friends can download to learn to learn!)

相关性算法包括自相关互相关传递函数，相关性的程序编写等等(Correlation algorithm, including auto-correlation inter-related transfer function, the relevance of the procedures for the preparation and so on)

该程序是MATLAB源程序，可以用来对纹理图像进行分割。(MATLAB source code of the procedure can be used for texture image segmentation.)

MUSIC算法。可进行波达方向估计（DOA），并进行高分辨率现代谱估计。(MUSIC algorithm. DOA can be estimated (DOA), and modern high-resolution spectral estimation.)

用matlab/simulink对DSP（28335）编程，避免繁琐的程序编写并降低了出错概率(Use matlab/simulink for DSP (28335) programming, to avoid cumbersome procedures for the preparation and reduce the probability of errors)

MUSIC方法估计信号方位(MUSIC methods are used to estimate the signal direction)