91.204.201 Computing IV

91.204.201 Computing IV Visual C++ 2010 Introduction with OpenCV 2.4.3 Example Xinwen Fu

Reading Assignment • Chapter one of the tutorials http://finance.yahoo.com/news/the-college-degrees-with-the-highest-starting-salaries-204949790.html By Dr. Xinwen Fu

Outline • Installing and configuring Visual Studio 2010 to run an OpenCV example • Visual studio concepts • Tips of using Visual C++ • Example code By Dr. Xinwen Fu

Demo http://www.youtube.com/watch?v=cgo0UitHfp8

How to install OpenCV 2.4.3 on Visual Studio 2010 • OpenCV for Windows • Version 2.4.3 • Visit http://kylehounslow.com/?page_id=75 for source code: there is some bug • Some copy and pastables:Additional Include Directories: $(OPENCV_BUILD)\includeAdditional Library Directories: $(OPENCV_BUILD)\x86\vc10\lib By Dr. Xinwen Fu

How to install OpenCV 2.4.3 on Visual Studio 2010 (Cont’d) • Debug Additional Dependencies: opencv_core243d.libopencv_imgproc243d.libopencv_highgui243d.libopencv_ml243d.libopencv_video243d.libopencv_features2d243d.libopencv_calib3d243d.lib • Release Additional Dependencies (same thing but without 'd' at the end):opencv_core243.libopencv_imgproc243.libopencv_highgui243.libopencv_ml243.libopencv_video243.libopencv_features2d243.libopencv_calib3d243.lib By Dr. Xinwen Fu

Differences between .dll , .lib, .h files? • .h - header file • a source file containing declarations (as opposed to .cpp .cxx etc. containing implementations) • .lib - static library • may contain code or just links to a dynamic library • compiled code that you link with your program • The static library is included in your .exe at link time. • .dll - dynamic library • Just like a static one but you need to deploy it with your .exe file because its loaded at run time By Dr. Xinwen Fu

Configuration tips • No need of care about your systems is 64 bits or 32 bits • 32 bits applications can run on 64 bits machines without problems • Use 32 bits OpenCV library By Dr. Xinwen Fu

Troubleshooting • If it does not work following the video tutorial, you must have done one of the steps wrong • Double check it By Dr. Xinwen Fu

Solutions and Projects • Visual Studio provides two containers to help you efficiently manage the items that are required by your development effort, such as references, data connections, folders, and files. • These containers are called solutions and projects. • Visual Studio provides Solution Folders to organize related projects into groups and then perform actions on those groups of projects. • Solution Explorer, an interface for viewing and managing these containers and their associated items, is part of the integrated development environment (IDE). By Dr. Xinwen Fu

Items • Items can be files and other parts of your project such as references, data connections, or folders • In Solution Explorer, items can be organized • as project items, which are items that compose your project, such as forms, source files, and classes within a project in Solution Explorer. • as solution items for files that are applicable to your solution as a whole in the Solution Items folder of Solution Explorer. • as miscellaneous files that are not associated with either a project or a solution and that can be displayed in a Miscellaneous Files folder By Dr. Xinwen Fu

Solutions as Containers • Visual Studio implements conceptual containers called solutions and projects to enable the integrated development environment (IDE) to apply its wide range of tools, designers, templates, and settings • Visual Studio automatically generates a solution when you create a new project By Dr. Xinwen Fu

Advantages • Solutions allow you to concentrate on developing and deploying your projects, instead of sorting through all the details of managing project files, components, and objects. • Each Visual Studio solution allows you to: • Work on multiple projects within same instance of IDE. • Work on items using settings and options that apply to an entire set of projects. • Use Solution Explorer to help develop and deploy your application. • Manage additional files opened outside the context of a solution or project. By Dr. Xinwen Fu

Definition Files • Visual Studio stores the definition for a solution in two files: .sln and .suo • In previous versions of Visual Studio, you might have noticed the group (.vbg) or workspace (.dsw) files in Visual Basic and Visual C++, respectively. • The solution definition file (.sln) stores the metadata that defines your solution: • Projects that are associated with the solution. • Items available at the solution level that are not associated with a particular project. • Solution build configurations that set which project configurations to apply in each type of build. By Dr. Xinwen Fu

Definition Files (Cont’d) • The metadata stored in the .suo file as you construct a solution and set its properties is used to customize the IDE whenever the solution is active. By Dr. Xinwen Fu

Projects as Containers • To help you to organize and perform common tasks on the items that you are developing, Visual Studio projects are used as containers within a solution to logically manage, build, and debug the items that comprise your application. • The output of a project is usually an executable program (.exe), a dynamic-link library (.dll) file or a module, among others. By Dr. Xinwen Fu

Create a Visual Studio Solution • In Visual Studio, click File, point to New, and then click Project. • In the New Project dialog box, in the Project types pane, click Other Project Types, and then click Visual Studio Solutions. • In the Templates pane, click Blank Solution. • Enter the name of your project in the Name field, and then click OK. By Dr. Xinwen Fu

Align C++ code in VS 2010 • Often code is copied into a .cpp file and the formatting is lost • Reformatting the code – within vc++ • Edit -> Advanced -> Format Selection By Dr. Xinwen Fu

Enable Line Numbers in Visual C++/C# 2010 • Tools -> Options -> Text Editor -> C/C++ -> check Line Numbers -> OK By Dr. Xinwen Fu

StartUp project in a soluton • Select a StartUp project and click to debug it • Right click the project and select it By Dr. Xinwen Fu

Debugging with command-line parameters in Visual Studio • In VS 2008, 2010, or 2012, right-click the project, choose properties, go to the Debugging section • there is a box for command line arguments By Dr. Xinwen Fu

Zoom in/out with Visual Studio 2010 editor • Zoom in, Ctrl+Shift+period • Zoom out, Ctrl+Shift+comma By Dr. Xinwen Fu

Change the color of ink of Powerpoint • Change the color of ink before starting a slide show • On the Slide Show menu, click Set Up Show. • In the Pen color box, click the color you want, and then click OK. • Change the ink color during a slide show • On the Slide Show toolbar, click or tap the pointer arrow, point to Ink Color, and then click the color you want. • Note Changing the color of the ink during the slide show affects the ink for the ballpoint and felt tip pens only. • Change the color of ink on a Tablet PC • Select the ink you want to format. • On the Ink Drawing and Writing or Ink Annotations toolbar, tap Select Objects. • Tap the ink. Sizing handles and an outline of the ink shapes indicate that the ink is selected. • On the Ink Drawing and Writing or Ink Annotations toolbar, tap the arrow next to Line Color. • Tap the color you want to use. • Tip • After you select a color, the Line Color button displays that color. You can apply the same color again to any ink selection by clicking or tapping Line Color again. By Dr. Xinwen Fu

OpenCV 2 Example DisplayImage.cpp By Dr. Xinwen Fu

Video Capture Example • #include <opencv\cv.h> • #include <opencv\highgui.h> • #include <iostream> • using namespace std; • using namespace cv; • int main(){ • Mat m; • VideoCapture cap; • cap.open(0); • cout<<cap.isOpened()<<endl; • namedWindow("window",1); • while(1){ • cap>>m; • imshow("window",m); • waitKey(33); • } • return 0; • } By Dr. Xinwen Fu

OpenCV 1 Example By Dr. Xinwen Fu

cv Namespace • All OpenCV classes and functions are in the cv namespace. • Therefore, to access this functionality from your code, use the cv:: specifier or using namespace cv; directive: • #include "opencv2/core/core.hpp" • ... • cv::Mat H = cv::findHomography(points1, points2, CV_RANSAC, 5); • ... • or • #include "opencv2/core/core.hpp" • using namespace cv; • ... • Mat H = findHomography(points1, points2, CV_RANSAC, 5 ); • ... By Dr. Xinwen Fu

References • Application Development in Visual Studio By Dr. Xinwen Fu

91.204.201 Computing IV