C++ 多项目dll调用-隐式

将DAA人脸检测做成动态库以便其他程序调用，采用隐式调用完成。

给出部分关于dll制作的关键代码：

1.DLL

多项目DLL编写注意将其他相关项目设置成静态库，以及各库涉及的版本一致性。

DLL.h

 #define DLL_API __declspec(dllexport)
 #include<iostream>
 #include<opencv.hpp>

 DLL_API void FaceDecter(cv::Mat& source,std::vector<cv::Rect>& rects);

DLL.cpp

 #include "stdafx.h"
 #include "FaceDectectDll.h"
 #include "../libmi_dpm/face_detector.hpp"
 #include <fstream>

 using namespace std;
 using namespace mi_dpm;
 using namespace cv;

 DLL_API void FaceDecter(cv::Mat &source, std::vector <cv::Rect> & rects)
 {
     Detector face_det;
     face_det.detectInit();
     vector<float> scores;
     vector<int> picked;
     picked = face_det.detectFastMerge(source, rects, scores);
 }

2.DLL调用

在demo中新建文件夹 lib-DAA ，include-DAA 存放静态库以及相关头文件，在可执行文件下放入动态库dll。

demo.h

 // stdafx.h : include file for standard system include files,
 // or project specific include files that are used frequently,
 // but are changed infrequently

 #pragma once

 #ifndef _SECURE_ATL
 #define _SECURE_ATL 1
 #endif

 #ifndef VC_EXTRALEAN
 #define VC_EXTRALEAN            // Exclude rarely-used stuff from Windows headers
 #endif

 #define _ATL_CSTRING_EXPLICIT_CONSTRUCTORS      // some CString constructors will be explicit

 // turns off MFC's hiding of some common and often safely ignored warning messages
 #define _AFX_ALL_WARNINGS

 #include "../include-DAA/FaceDectectDll.h"
 #pragma comment(lib,"../lib-DAA/lib3000fps.lib")
 #pragma comment(lib,"../lib-DAA/liblinear.lib")
 #pragma comment(lib,"../lib-DAA/libmi_dpm.lib")
 #pragma comment(lib,"../lib-DAA/mi_dpm.lib")

 //#include <cxcore.h>
 //#include <highgui.h>
 #include<opencv.hpp>

 using namespace cv;
 using namespace std;

demo.cpp

 #include <iostream>
 #include "stdafx.h"

 //#include <Windows.h>

 int main()
 {
     Mat im = imread("F:/科研/人脸识别/DAA/mi_dpm/mi_dpm/testpic/tmp_rs.jpg");
     vector<Rect> re;// = FaceDecter(im);
     FaceDecter(im, re);
     int nNum = re.size();
     cout << nNum << endl;
     for (int i = ; i < nNum; i++)
     {
         cv::rectangle(im, re[i], cv::Scalar(, , ), );
         printf("%d %d %d %d\n", re[i].x, re[i].y, re[i].width, re[i].height);
     }
     imshow("dec",im);
     waitKey();
     system("pause");

 }