Visual studio 2022 downloading and configuring opencv4.5.5

1 brief introduction

OpenCV（Open Source Computer Vision Library） Is an open source computer vision library , It provides a lot of functions , These functions implement computer vision algorithms very efficiently （ The most basic filtering to advanced object detection are covered ）.
OpenCV Use C/C++ Development , It also provides Python、Java、MATLAB And other language interfaces .
OpenCV It's cross platform , Can be in Windows、Linux、Mac OS、Android、iOS Wait for the operating system to run .
OpenCV It's widely used , Including image mosaic 、 Image denoising 、 Product quality inspection 、 human-computer interaction 、 Face recognition 、 Action recognition 、 Motion tracking 、 Driverless, etc .
OpenCV Machine learning modules are also provided , You can use normal Bayes 、K Nearest neighbor 、 Support vector machine 、 Decision tree 、 Random forests 、 Artificial neural network and other machine learning algorithms .
OpenCV Is an open source computer vision library , It can be downloaded from http://opencv.org obtain .
1999 year ,Gary Bradski（ Gary · Bradski ） At that time, I worked at Intel , With the vision of providing a stable infrastructure for practitioners of computer vision and artificial intelligence to promote the development of the industry , He started OpenCV project .
OpenCV Library use C Language and C++ Language writing , Can be in Windows、Linux、Mac OS X Wait for the system to run . At the same time, we are actively developing Python、Java、Matlab And some other language interfaces , Import the library into Android and iOS Develop applications for mobile devices in .
OpenCV Since its inception, the project has received strong support from Intel and Google , Thank you in particular Itseez, The company did most of the early development . thereafter ,Arraiy The team joins the project and is responsible for maintaining the always open source and free OpenCV.org.
Itseez It's a vision company in Russia , Specializing in computer vision algorithms .2016 year 5 month , Intel acquired the company , With “ Help Intel users create innovative deep learning CV application , If autonomous driving 、 Digital security monitoring and industrial testing ”（ General manager of Intel Internet of things Doug Dacies So to speak ）.
OpenCV Designed for efficient computation , Emphasis on real-time application development . It consists of C++ Language and deep optimization , So you can enjoy the advantages of multithreading .
OpenCV One of our goals is to provide an easy-to-use computer vision interface , To help people quickly build sophisticated visual applications .
OpenCV The library contains information derived from various fields of computer vision 500 Multiple functions , Including quality inspection of industrial products 、 Medical image processing 、 Security 、 interactions 、 Camera calibration 、 Binocular vision and Robotics .
Because computer vision and machine learning are often used together , therefore OpenCV It also contains a complete 、 A universal machine learning library （ML modular ）. This sub library focuses on statistical pattern recognition and clustering .ML The module of OpenCV Core tasks of （ Computer vision ） Quite useful , But this library is generic enough , It can be used for any machine learning problem .
use BCD The license

2 install vs2022

Win10 Of 64 Bit operating system , Directly in VS Download from the official website VisualStudioCommunity, Default installation , Installation is VisualStudioCommunity2022：

（ Installed 【 The workload 】 The step is 【 Use C++ Desktop development 】 and 【 Universal Windows Platform development 】 And other toolsets 【VisulStudio Extended development 】）

3 OpenCV4.5.5 download

Download address https://opencv.org/releases/

4 decompression OpenCV environment variable

cmd -> sysdm.cpl

5 Visual Studio2022 To configure OpenCV

5.1 open visual studio 2022 Create a new project , choice C++ Console Application

5.2 Add project property sheet .

For ease of use , We can also add attribute tables , To configure OpenCV Properties of , The attribute table is props file . After each new project , Just put the property sheet under the project path , And add it to the project to use , There is no need to configure repeatedly OpenCV Properties of . Avoid repeated configuration OpenCV Properties and switching compilation mode get trouble , Choose... For yourself .

Find your own Debug and Release Pattern , For example, I want to use x64 Of Debug, I'll choose the second , Right click to select “ Add new project property sheet ”.

Open the existing VS project , In the lower left corner - Property Manager -DeBug|X64 In the right - Add new project property sheet . Then set the name as ：Debug_x64_opencv.props And save .

The property sheet file is saved in the project folder , The next time you want to use it , Direct copy 、 Paste it into the new project folder , And add it to the project attribute manager , Very convenient .
End of configuration OpenCV After the attributes , You can start using it OpenCV 了 . It is best to save the attribute table in a fixed path , Easy to copy 、 Paste , Use in the next project . Adding a property sheet is also simple , First copy the attribute table 、 Paste into the project folder of the current project , Then open the “ Property Manager ”, Find the corresponding “ Pattern ” and “ digit ”, Here is “Debug|x64”, Then right click and select “ Add an existing property sheet ”, Copy 、 Just add the pasted property sheet file .

5.3 Configure property sheet

Right click the attribute table just added , Click properties . Click on VC++ The include directory in the directory , Add to our include directory

F:\soft\bin\opencv\opencv\build\include\opencv2
F:\soft\bin\opencv\opencv\build\include（ Without this VS It will report an error but it can run ）

VC++ The Library Directory in the directory , Add to our library Directory

stay “ General properties - The linker - Input - Additional dependency ” Add %opencv%\build\x64\vc15\lib\opencv_world451d.lib,%opencv% For your own opencv Catalog . Different versions of this file have different names , Just put your own version of opencv Fill in the file name in the folder . Be careful if ****d.lib, Because only d.lib It corresponds to dubug edition


perhaps All options -> Additional dependency

6 test

When running, you must choose DeBug|x64、

#include<opencv2/core/core.hpp>
#include<opencv2/highgui/highgui.hpp>
#include<opencv2/imgproc.hpp>
#include<iostream>
using namespace cv;
using namespace std;

int main() {
	Mat image = Mat::zeros(300, 600, CV_8UC3);
	circle(image, Point(300, 200), 100, Scalar(0, 255, 120), -100);
	circle(image, Point(400, 200), 100, Scalar(255, 255, 255), -100);
	imshow("show window", image);
	waitKey(0);
	return 0;
}

7 Quickly configure in new projects

In a new project , Just in the attribute manager , Right click DeBug|x64- Add an existing property sheet - Select the property sheet we just configured Debug_x64_opencv.props You can quickly complete the configuration

attach ： To configure Release Pattern
What we just configured can only be DeBug|x64 Run in , Let's configure Release|x64 The property sheet of , Can be in Release|x64 Run in .

In the property manager , Right click Release|x64- Add new project property sheet . Then set the name as ：Release_x64_opencv.props And save .
Right click the newly created property sheet - attribute , stay “ General properties -VC++ Catalog - routine - Contains the directory ” and “ General properties -VC++ Catalog - routine - The library catalog ” The settings in are the same as above .
stay “ General properties - The linker - Input - Additional dependency ” Add %opencv%\build\x64\vc15\lib\opencv_world451.lib,%opencv% For your own opencv Catalog . Different versions of this file have different names , Just put your own version of opencv Fill in the file name in the folder . Be careful if ****.lib, Because only .lib It corresponds to Release edition

4. Click OK to save the property sheet , And test . When running, you must choose Release|x64
In a new project , Just in the attribute manager , Right click Release|x64- Add an existing property sheet - Select the property sheet we just configured Release_x64_opencv.props You can quickly complete the configuration
thus DeBug and Release Next OpenCV It's all configured , And the configuration can also be completed quickly in new projects

8 There may be problems

problem 1： Lost in computer msvcp120.dll

This is a problem , Download again msvcp120.dll, Then add to the corresponding bin In the folder , That is, the environment variable added above , these two items. dll Has been uploaded to Baidu cloud , Please download by yourself .

Baidu network disk link ：https://pan.baidu.com/s/1CLnom87fShhl7wF4yAKggw
Extraction code ：28a7

problem 2： Lost in computer opencv_highgui2413d.dll

This is a problem , Generally, environment variables are not added to （ routing problem ） Or do not restart the computer after adding the environment variables to make the environment variables take effect .

problem 3： Application failed to start properly , As shown in the figure below ：

No will bin The file path is added to the environment variable , You also need to reboot .

problem 4： The following error occurred , Interface not supported , The main situation is ： The camera can't be turned on or wait “ Interface not supported ” It can only be opened after it is finished

This problem , When you turn on the camera , Keep returning false, Sometimes you are reminded to choose a video format FFMPEG, May be OpenCV Has been destroyed , You can use another version of OpenCV To test it , What I'm using now opencv342, It may be broken , I'll use it well opencv2410 To test , Found that the camera can be turned on , Re next opencv Just fine , It can also be used DirectX To fix dll.

VideoCapture cap(0);

while (cap.isOpened())

problem 5：“CAP_PROP_FRAME_COUNT”: undeclared identifier perhaps “CAP_PROP_FRAME_COUNT”: No “cv” Members of

This happens , It may be due to OpenCV Version causes ,OpenCV3 It can be written like this , however OpenCV2 It needs to be written CV_CAP_PROP_FRAME_COUNT

problem 6： Pop up the error prompt box “ Can't find mfc100”

Go to 360 Download a collection of Microsoft's common runtime libraries , commonly 360 It will pop up automatically .