背景建模技术(三):背景减法库(BGS Library)的基本框架与入口函数main()的功能
背景减法库(BGS Library = background subtraction library)包含了37种背景建模算法,也是目前国际上关于背景建模技术研究最全也最权威的资料。本文将更加详细的介绍背景减法库(BGS Library)的基本框架与入口函数main()的功能。
BGS库的整体框架在背景建模技术(二)中已经全部给出,此处从函数的角度再次给出BGS库的基本框架,有利于代码的修改与维护。
如下图所示是基于C++的BGS库的函数流程图:
接下来将会对每个函数进行更加详细的分析。
首先,先看入口函数main(),代码如下:
- #include "Config.h"
- #include "VideoAnalysis.h"
- #include <iostream>
- using namespace std;
- namespace bgslibrary
- {
- class Main
- {
- private:
- Main();
- public:
- static void start(int argc, const char **argv)
- {
- cout << "-----------------------------------------" << endl;
- cout << "Background Subtraction Library v1.9.2 " << endl;
- cout << "http://code.google.com/p/bgslibrary " << endl;
- cout << "by: " << endl;
- cout << "Andrews Sobral (andrewssobral@gmail.com) " << endl;
- cout << "Optimized by: " << endl;
- cout << "Rui-Dong Fang(National Huaqiao University)" << endl;
- cout << "-----------------------------------------" << endl;
- cout << "Using OpenCV version " << CV_VERSION << endl;
- try
- {
- int key = KEY_ESC;
- do
- {
- VideoAnalysis* videoAnalysis = new VideoAnalysis;
- if (videoAnalysis->setup(argc, argv)) ///videoAnalysis->setup(argc, argv)
- {
- videoAnalysis->start();
- cout << "Processing finished, enter:" << endl;
- cout << "R - Repeat" << endl;
- cout << "Q - Quit" << endl;
- key = cv::waitKey();
- }
- cv::destroyAllWindows();
- delete videoAnalysis;
- }
- while (key == KEY_REPEAT);
- }
- catch (const std::exception& ex)
- {
- cout << "std::exception:" << ex.what() << endl;
- return;
- }
- catch (...)
- {
- cout << "Unknow error" << endl;
- return;
- }
- #ifdef WIN32
- //system("pause");
- #endif
- }
- };
- }
- int main(int argc, const char **argv)
- {
- bgslibrary::Main::start(argc, argv);
- return 0;
- }
在main()函数中,除了打印出相关信息和设置waitKey()以外,主要就是调用了VIdeoAnalysis.cpp(将在下一篇博文中分析)中的videoAnalysis->setup(argc, argv)和videoAnalysis->start()。下面给出Main.cpp的代码流程图: