OpenCV中CommandLineParse類主要是命令列解析類。

OpenCV中出現此類的主要目：方便使用者在命令列使用過程中減少工作量。具體使用方式如下：

const String keys =
    "{help h usage ? |      | print this message   }"
    "{@image1        |      | image1 for compare   }"
    "{@image2        |      | image2 for compare   }"
    "{@repeat        |1     | number               }"
    "{path           |.     | path to file         }"
    "{fps            | -1.0 | fps for output video }"
    "{N count        |100   | count of objects     }"
    "{ts timestamp   |      | use time stamp       }"
    ;
 

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");
double fps = parser.get<double>("fps");
String path = parser.get<String>("path");

use_time_stamp = parser.has("timestamp");

String img1 = parser.get<String>(0);
String img2 = parser.get<String>(1);

int repeat = parser.get<int>(2);

if (!parser.check())
{
    parser.printErrors();
    return 0;
}