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Learn Opencv--surf simplified version

I've written about the blog:http://blog.csdn.net/sangni007/article/details/7482960 of learning surf algorithms before.But the code is cumbersome, and it involves the Flann algorithm (where the random kdtree+knn), although it can be seen, but more laborious, today in the document found a simplified version:1.SurfFeatureDetector detector (Minhessian); structure Surf detector;Detector.detect (img_1, keypoints_

[Zz] comparison and analysis of three powerful object recognition algorithms: sift/surf, Haar features, and generalized Hough Transformation

Recognition Algorithm Overview: Sift/Surf is based on grayscale images, 1. First, create an image pyramid to form a three-dimensional image space. Use the Hessian matrix to obtain the local maximum value of each layer, and then perform NMS at 26 points around the Extreme Point, in this way, a rough feature point is obtained, and the layer (scale) of the precise feature point is obtained by quadratic interpolation, that is, the scale is not changed. 2

Comparison and Analysis of Three powerful object recognition algorithms: sift/surf, Haar features, and Generalized HOUGH Transform

RecognitionAlgorithmOverview: Sift/Surf is based on grayscale images, 1. First, create an image pyramid to form a three-dimensional image space. Use the Hessian matrix to obtain the local maximum value of each layer, and then perform NMS at 26 points around the Extreme Point, in this way, a rough feature point is obtained, and the layer (scale) of the precise feature point is obtained by quadratic interpolation, that is, the scale is not change

Linux DHCP get IP address can surf the Internet, set a static IP address is not Internet access

Today encountered a strange problem: the installation of a centos6.6, after the installation of the default DHCP to obtain the IP address, found to be able to surf the internet, get the IP address of 192.168.0.131/24, because it is installed server, so it is intended to set this address as a static IP address, The use of Yum found that the connection is not up, and later found that the system is unable to surf

How to set up a wireless router to surf the internet <详细介绍></详细介绍>

necessary configuration options. And generally will first see the router's "running state", so that users can have a preliminary status of the wireless router master. -Wireless Router detail setting ">"Run State" Then you can see the "Setup Wizard" (red box) function options, this feature allows users to make easy and fast network connectivity, but also allows users to the router to make the necessary basic settings, make it more convenient and quick to build a wireless network. -Wireless ro

LAN some computers can surf the internet and the failure to troubleshoot cases

into the same virtual work subnet, each virtual work subnet is inaccessible to each other. I don't know why lately, LAN in a part of the client system is suddenly abnormal, the specific phenomenon of Internet speed is very slow, and often will happen for a while to surf the internet, a moment can not surf the strange fault; After the network Management site survey, found that these online abnormal client s

Comparison and Analysis of Three powerful object recognition algorithms: sift/surf, Haar features, and Generalized HOUGH Transform

Recognition Algorithm Overview: Sift/Surf is based on grayscale images, 1. First, create an image pyramid to form a three-dimensional image space. Use the Hessian matrix to obtain the local maximum value of each layer, and then perform NMS at 26 points around the Extreme Point, in this way, a rough feature point is obtained, and the layer (scale) of the precise feature point is obtained by quadratic interpolation, that is, the scale is not changed. 2

[Experience] My computer only IE64 browser can surf the internet, the other software is not on the net

"Online Case"1, "My Computer is Vista system yesterday also good in the morning to show what Windows Communication port initialization failed and not even the internet for the strongman help"2, "Normal shutdown, the next day after the boot, unable to surf the internetAll browsers, except IE64-bit can not surf the internet , QQ, Foxmail also notCan ping, DNS no problem, can parse the address normally , only

ubuntu14.04 cannot surf the internet "No Network devices available"

What is the network card you are using in Linux sudo lshw-c network or LSPCI My is Intel's, Lenovo computer: The following references: Http://blog.chinaunix.net/uid-11829250-id-5748402.html Lenovo Server Thinkstation P310, after installing the ubuntu14.04 (64bit) LTS, can not surf the Internet. This is because the network card driver is not installed successfully, you need to install the network card driver.The motherboard type of thinkstation P310 is

Solution WIN7 System Right bottom corner Network icon can surf the net but show little sun

Registration nearly 10 years, and today to record a solution to the WIN7 system in the lower right corner of the network icon can surf the internet but show the problem of small sun.Phenomenon:1, the system can surf the Internet, but the network icon in the lower right corner can surf the internet but show the small sun, or rolling small circle.2, the network and

Android to determine if you can actually surf the internet

Android to determine whether you can surf the internet, commonly used is the following method:? 1234567891011121314 /*** 检测网络是否连接* * @return*/private boolean isNetworkAvailable() {// 得到网络连接信息ConnectivityManager manager = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);// 去进行判断网络是否连接if (manager.getActiveNetworkInfo() != null) {return manager.getActiveNetworkInfo().isAvailable();}return false;} However, some

Virtual machine Environment CentOS How to surf the Internet

Virtual machine Environment CentOS How to surf the Internet----------by ruffianfish. Ruffian FishBecause I am using the virtual machine environment, so all operating angles from the virtual machine.Advantages of the virtual machine environment: For beginners to learn Linux Never be afraid to make the system bad, because the virtual machine has a snapshot function, this is a god-like function, you can save the system environment to a time

Learning opencv-surf simplified version

I wrote a blog about learning surf algorithms: http://blog.csdn.net/sangni007/article/details/7482960. However, the Code is troublesome and involves the FLANN algorithm (random kdtree + KNN). Although it can be understood, it is difficult to find a simplified version in the document today: 1. surffeaturedetector detector (minhessian); construct a surf detector; Detector. Detect (img_1, keypoints_1); detecto

Linux Learning CentOS (10)-How to surf the Web with CentOS under a virtual machine

to surf the web in a virtual machine CentOSRui Jie, Xaar certified mentohustHttp://code.google.com/p/mentohust/downloads/listAfter all these methods have been tried without fruit, the heart is also seriously hit .... Even in the virtual machine in the Internet problem can not be solved ...Finally in a sleepy afternoon, holding the last try mentality, continue to Google Solutions, Emperor .... Finally in a blog post was inspired, and then experiment,

Problems encountered in OPENCV using the surf algorithm

Error 1error LNK2019: unresolved external symbol "Public: __thiscall Cv::surf::surf (Double,int,int,bool,bool)" ([Email Protected]@@[email Protected][email protected]), the symbol is referenced in the function _mainError 2error lnk1120:1 an unresolved external commandWorkaround:Missing function libraryOpencv_features2d245d.lib245 places are own OPENCV versionAbove the above 2.4.x, unified to change it intoO

How routers restrict network speed control people to surf the internet

network can be normal access between the inside. How routers Restrict network speed: Settings that do not allow a computer to surf the internet 1. Set page--Security settings--firewall Settings--Choose to open the firewall, turn on the MAC address filter Two--"Prohibit the Set MAC address list enabled MAC address Internet access." 2. Set page--Security settings--mac address filtering--Add a new entry--put the MAC address of a computer that is not

What if the wireless router does not surf the Internet?

What if the wireless router does not surf the Internet? First of all, of course, plug in the power cord, next is the network cable to connect the hardware equipment. The blue RJ45 interface in the figure is a WAN (usually only 1) connected to the ADSL modem via a network cable, while the four yellow RJ45 interfaces are LAN ports (usually 2-4), which are connected to a computer or notebook via a network cable. Now that the power is turned on and the

The reason why the computer is slow to surf

The reason why the computer is slow to surf There are many reasons for the slow speed of computer surfing, the following list some of the reasons that affect the speed of computer surfing, if your computer is slow to surf the internet can be based on the following conditions to solve, generally can find the reason for the slow speed of computer surfing, the general analysis of the computer's fault is the f

Unit assigned IP address and computer host binding, I would like to set up a wireless router, so that my laptop and mobile phones are able to surf the Internet?

unit assigned IP address and computer host binding, I would like to set up a wireless router, so that my laptop and mobile phones are able to surf the Internet? With a wireless router can be implemented, the computer IP configured to automatically get, find a network cable one-way LAN port (marked on the router), a plug on the computer;1, landing router (for Tp-link router: Open your computer, click on the IE browser, enter in the Address bar: 192.168

Learning opencv -- match Fast Detection With Surf &amp; brief (Entertainment)

These days, we 've been stuck in the fast, surf, shift, brief, and ORB feature detection algorithms !!! All labs are in the previous blog. Opencv has already implemented them, so we will use opencv to test the effects of various methods, My original intention was match. The feature points detected by fast could not be extracted from descriptor !!! However, it is found that the keypoints detection and match process can be separated (although it may be

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