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 = 0; i < nNum; i++)
    {
        cv::rectangle(im, re[i], cv::Scalar(0, 125, 255), 2);
        printf("%d %d %d %d
", re[i].x, re[i].y, re[i].width, re[i].height);
    }
    imshow("dec",im);
    waitKey(30);
    system("pause");

}