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PG_BOW_DEMO
图像的特征用到了Dense Sift，通过Bag of Words词袋模型进行描述，当然一般来说是用训练集的来构建词典，因为我们还没有测试集呢。虽然测试集是你拿来测试的，但是实际应用中谁知道测试的图片是啥，所以构建BoW词典我这里也只用训练集。
其实BoW的思想很简单，虽然很多人也问过我，但是只要理解了如何构建词典以及如何将图像映射到词典维上去就行了，面试中也经常问到我这个问题，不知道你们都怎么用生动形象的语言来描述这个问题？
用BoW描述完图像之后，指的是将训练集以及测试集的图像都用BoW模型描述了，就可以用SVM训练分类模型进行分类了。
在这里除了用SVM的RBF核，还自己定义了一种核： histogram intersection kernel，直方图正交核。因为很多论文说这个核好，并且实验结果很显然。能从理论上证明一下么？通过自定义核也可以了解怎么使用自定义核来用SVM进行分类。(Image features used in a Dense Sift, by the Bag of Words bag model to describe the word, of course, the training set is generally used to build the dictionary, because we do not test set. Although the test set is used as the test you, but who knows the practical application of the test image is valid, so I am here to build BoW dictionary only the training set.
In fact, BoW idea is very simple, although many people have asked me, but as long as you understand how to build a dictionary and how to image map to the dictionary D up on the line, and interviews are often asked me this question, do not know you all how to use vivid language to describe this problem?
After complete description of the image with BoW, refers to the training set and test set of images are described with the BoW model, the training of SVM classification model can be classified.
Apart from having to use the RBF kernel SVM, but also their own definition of a nuclear: histogram intersection kernel, histogram )
- 2011-11-01 17:01:09下载
- 积分：1
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atrous
采用多孔trous算法matlab代码，变了好长时间，大家可以参考一下(porous trous algorithm using Matlab code, changed a good long time, we can take a look)
- 2007-05-20 09:27:14下载
- 积分：1
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super-jpg2k
基于JPG2000图像的超分辨率重建的matlab程序(JPG2000-based super-resolution reconstruction of image matlab program)
- 2010-01-07 00:10:31下载
- 积分：1
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GeometricVersion3
课程设计
几何图形(满分50 分)
版本1：满分10 分
设计抽象类GeometricObject 及其子类Triangle 和Circle。
GeometricObject 类设计要求如下：
■ 一个名为color 的Color 类型的私有数据域，表示对象的颜色。
■ 一个名为filled 的Boolean 类型的私有数据域，表示对象是否填充颜色。
■ 一个名为dateCreated 的Date 类型的私有数据域，表示对象的创建日期。
■ 一个无参构造方法。
■ 一个能创建特定color 和filled 的有参构造方法。
■ 相关数据域的访问器和修改器。
■ 两个个名为draw 和erase 的抽象方法。
■ 一个名为getArea 的抽象方法。
■ 一个名为getPerimeter 的抽象方法。
■ 重写toString 方法。
Triangle 类设计要求如下：
■ 三个名为side1、side2 和 side3 的double 类型的私有数据域表示三角形的三条边。它
们的默认值是1.0。要求三个数据域保留2 位小数。
■ 一个无参的构造方法创建默认三角形。
■ 一个能创建带指定side1、side2 和 side3 的有参构造方法。
■ 所有三个数据域的访问器和修改器方法。
■ 父类抽象方法的实现。
■ 重写toString 方法。
Circle 类(Curriculum Design
Geometry (out of 50)
Version 1: 10 points
Design an abstract class and its subclasses GeometricObject Triangle and Circle.
GeometricObject class design requirements are as follows:
■ a named color of the Color type private data field that indicates the object s color.
■ a Boolean type called filled private data field that indicates whether the object fill color.
■ Date type named dateCreated private data field, which means that the object was created.
■ a no-argument constructor.
■ one can create a specific color and filled in with arg constructor.
■ Related data field accessor and modifier.
■ two months called draw and erase the abstract methods.
■ an abstract method named getArea.
■ an abstract method named getPerimeter.
■ overridden toString method.
Triangle class design requirements are as follows:
■ three named side1, side2 and a double side3 private data field indicates the type of triangle with three sides. It
Our default value is 1.0. Requires)
- 2020-12-10 08:59:18下载
- 积分：1
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danmu
说明： 基于opencv平台编写的单目相机标定程序，使用的张正友的方法，只要准备十二张单目相机拍摄的棋盘格的图片就可以标定出单目相机的焦距等参数，建立单目相机坐标系。可以用于机器视觉测量中，也可以用于双面相机标定的前一步，精度很高。(Based on the monocular camera calibration program compiled by the OpenCV platform, the method of Zhang Zhengyou is used to calibrate the focal length and other parameters of the monocular camera and establish a monocular camera coordinate system as long as 12 pieces of chessboard pictures taken by the monocular camera are prepared. It can be used in machine vision measurement, and it can also be used in the previous step of the calibration of the double-sided camera, with high precision.)
- 2020-03-23 10:04:18下载
- 积分：1
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SPECKLE
斑点噪声的去除方法，主要适用sar图像，比较适合开题使用(Speckle noise removal methods, mainly for sar image, more suitable for the use of open questions)
- 2014-12-09 11:06:04下载
- 积分：1
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isar_code_new
ISAR点目标RD成像算法,距离向包络对齐，多普勒中心相位补偿(Algorithm for ISAR point target imaging)
- 2021-04-21 16:48:50下载
- 积分：1
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阈值分割迭代法处理图像
说明： 使用贝叶斯算法进行图像分割，迭代法寻找最佳阈值(Bayesian algorithm is used for image segmentation, and iterative method is used to find the best threshold)
- 2021-03-04 12:49:32下载
- 积分：1
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Radar_imaging_technology
保铮院士的《雷达成像技术》一书，对雷达成像原理等方面做了较详的介绍，对学习微波方面的有借鉴。(Bao Zheng academician of the radar imaging technology, a book on the radar imaging principle, etc. have done a more detailed description of the study area are from the microwave.)
- 2008-01-22 16:06:31下载
- 积分：1
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Wavelet_Sparse
Matlab小波稀疏代码。本程序实现小波在矩阵方程求解中的应用。(Matlab wavelet sparse code. This procedure achieved wavelet matrix equation solver.)
- 2013-04-25 16:56:24下载
- 积分：1
