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[OpenCV] Samples 13: opencv_version

2024-08-24 23:56:42   210人阅读

cv::CommandLineParser的使用。

I suppose CommandLineParser::has("something") should be true when the command line has --something in it.

./a.out -h./a.out --help

打印keys的相关内容。

 

#include <opencv2/core/utility.hpp>#include <iostream>using namespace std;const char* keys ={    "{ b build | | print complete build info }"    "{ h help  | | print this help           }"};int main(int argc, const char* argv[]){    cv::CommandLineParser parser(argc, argv, keys);    if (parser.has("help"))    {        parser.printMessage();    }    else if (!parser.check())    {        parser.printErrors();    }    else if (parser.has("build"))    {        std::cout << cv::getBuildInformation() << std::endl;    }    else    {        std::cout << "Welcome to OpenCV " << CV_VERSION << std::endl;    }    return 0;}

　　

一个更好的例子：

For example, define:

String keys = "{N count||}";

Call:

 1 $ ./my-app -N=20 2 # or 3 $ ./my-app --count=20  // 注意等号的应用

 

 

Keys赋值：

const string keys =    "{help h usage ? |      | print this message   }"    "{@image1        |      | image1 for compare   }"    "{@image2        |<none>| image2 for compare   }"    "{@repeat        |1     | number               }"    "{path           |/home/unsw     | path to file         }"    "{fps            | -1.0 | fps for output video }"    "{N count        |100   | count of objects     }"    "{ts timestamp   |      | use time stamp       }"    ;

如此解析：

    cv::CommandLineParser parser(argc, argv, keys);    parser.about("Application name v1.0.0");    if (parser.has("help"))    {        parser.printMessage();        return 0;    }    int N = parser.get<int>("N");    cout << "N = " << N << endl;    double fps = parser.get<double>("fps");    string path = parser.get<string>("path");    cout << "path: " << path << endl;    time_t use_time_stamp = parser.has("timestamp");    string img1 = parser.get<string>(0);    cout << "img1: " << img1 << endl;    string img2 = parser.get<string>(1);    cout << "img2: " << img2 << endl;    int repeat = parser.get<int>(2);    cout << "repeat: " << repeat << endl;    if (!parser.check())    {        parser.printErrors();        return 0;    }

运行结果：

技术分享

没毛病！

 

[OpenCV] Samples 13: opencv_version


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