// dllmain.cpp : 定義 DLL 應用程序的入口點。
#include <windows.h>
BOOL APIENTRY DllMain(HMODULE hModule,
DWORD ul_reason_for_call,
LPVOID lpReserved
)
{
switch (ul_reason_for_call)
{
case DLL_PROCESS_ATTACH:
case DLL_THREAD_ATTACH:
case DLL_THREAD_DETACH:
case DLL_PROCESS_DETACH:
break;
}
return TRUE;
}
二、新建detectdll.cpp
#include "opencv/cv.hpp"
#include "opencv2/objdetect/objdetect.hpp"
#include "opencv2/highgui/highgui.hpp"
#include "opencv2/imgproc/imgproc.hpp"
#include <time.h>
#include <iostream>
#include <stdio.h>
#include <opencv2/opencv.hpp>
#include <opencv2/imgproc/imgproc.hpp>
using namespace std;
using namespace cv;
IplImage* cutImage(IplImage* src, CvRect rect) {
cvSetImageROI(src, rect);
IplImage* dst = cvCreateImage(cvSize(rect.width, rect.height),
src->depth,
src->nChannels);
cvCopy(src, dst, 0);
cvResetImageROI(src);
return dst;
}
IplImage* detect1(Mat& img, CascadeClassifier& cascade, double scale)
{
int i = 0;
double t = 0;
vector<Rect> faces;
Mat gray, smallImg(cvRound(img.rows / scale), cvRound(img.cols / scale), CV_8UC1);
cvtColor(img, gray, CV_BGR2GRAY);
resize(gray, smallImg, smallImg.size(), 0, 0, INTER_LINEAR);
equalizeHist(smallImg, smallImg);
t = (double)cvGetTickCount();
cascade.detectMultiScale(smallImg, faces,
1.3, 2, CV_HAAR_SCALE_IMAGE,
Size(80, 80));
t = (double)cvGetTickCount() - t;
printf("detection time = %g ms\n", t / ((double)cvGetTickFrequency()*1000.));
for (vector<Rect>::const_iterator r = faces.begin(); r != faces.end(); r++, i++)
{
IplImage* temp = cutImage(&(IplImage(img)), cvRect(r->x, r->y, r->width, r->height));
return temp;
}
return NULL;
}
IplImage* det(Mat srcImg, char* path, String cascadeName){
IplImage *dst1 = 0; //目標圖像指針
IplImage *dst2 = 0; //目標圖像指針
CvSize dst_cvsize; //目標圖像尺寸
CascadeClassifier cascade;
if (!cascade.load(cascadeName))
{
cout << "cascade not load" << endl;
}
IplImage* faceImage1;
clock_t start2, finish2;
double totaltime2;
start2 = clock();
faceImage1 = detect1(srcImg, cascade, 1);
finish2 = clock();
totaltime2 = (double)(finish2 - start2) / CLOCKS_PER_SEC;
std::cout << "detectface time is :" << totaltime2 << "sec" << std::endl;
if (faceImage1 == NULL) {
cout << "no image" << endl;
}
dst_cvsize.width = 224; //目標圖像的寬爲源圖象寬的scale倍
dst_cvsize.height = 224; //目標圖像的高爲源圖象高的scale倍
dst1 = cvCreateImage(dst_cvsize, faceImage1->depth, faceImage1->nChannels); //構造目標圖象
// cvResize(src, dst, CV_INTER_LINEAR); //縮放源圖像到目標圖像
cvResize(faceImage1, dst1, CV_INTER_CUBIC); //縮放源圖像到目標圖像
cvSaveImage(path, dst1, 0);
// cvSaveImage("d:\\face.jpg", faceImage1, 0);
cv::Mat im1 = cv::cvarrToMat(dst1);
cvReleaseImage(&faceImage1);
return dst1;
}
三、新建頭文件detectdll.h#include "opencv/cv.hpp"
#include "opencv2/objdetect/objdetect.hpp"
#include "opencv2/highgui/highgui.hpp"
#include "opencv2/imgproc/imgproc.hpp"
#include <time.h>
#include <iostream>
#include <stdio.h>
#include <opencv2/opencv.hpp>
#include <opencv2/imgproc/imgproc.hpp>
using namespace std;
using namespace cv;
IplImage* cutImage(IplImage* src, CvRect rect);
IplImage* detect1(Mat& img, CascadeClassifier& cascade, double scale);
IplImage* det(Mat srcImg, char* path, String cascadeName);
四、新建source.def
把函數寫在這裏,然後空格@+數字,如果某個函數報錯,試着改個名字(我的detect函數一直抱錯,換成detect1就好了)
LIBRARY "detectdll"
EXPORTS
cutImage @1
detect1 @2
det @3
五、重新生成就好拉