【发布时间】：2016-06-18 11:46:04
【问题描述】：
我正在使用 Opencv，我尝试运行以下代码：
#include "opencv2/objdetect/objdetect.hpp"
#include "opencv2/highgui/highgui.hpp"
#include "opencv2/imgproc/imgproc.hpp"
#include <iostream>
#include <stdio.h>
using namespace std;
using namespace cv;
/** Function Headers */
void detectAndDisplay(Mat frame);
/** Global variables */
String face_cascade_name = "haarcascade_frontalface_alt.xml";
String eyes_cascade_name = "haarcascade_eye_tree_eyeglasses.xml";
CascadeClassifier face_cascade;
CascadeClassifier eyes_cascade;
string window_name = "Capture - Face detection";
RNG rng(12345);
/** @function main */
int main(int argc, const char** argv)
{
CvCapture* capture;
Mat frame;
//-- 1. Load the cascades
if (!face_cascade.load(face_cascade_name)) { printf("--(!)Error loading\n"); return -1; };
if (!eyes_cascade.load(eyes_cascade_name)) { printf("--(!)Error loading\n"); return -1; };
//-- 2. Read the video stream
capture = cvCaptureFromCAM(-1);
if (capture)
{
while (true)
{
frame = cvQueryFrame(capture);
//-- 3. Apply the classifier to the frame
if (!frame.empty())
{
detectAndDisplay(frame);
}
else
{
printf(" --(!) No captured frame -- Break!"); break;
}
int c = waitKey(10);
if ((char)c == 'c') { break; }
}
}
return 0;
}
/** @function detectAndDisplay */
void detectAndDisplay(Mat frame)
{
std::vector<Rect> faces;
Mat frame_gray;
cvtColor(frame, frame_gray, CV_BGR2GRAY);
equalizeHist(frame_gray, frame_gray);
//-- Detect faces
face_cascade.detectMultiScale(frame_gray, faces, 1.1, 2, 0 | CV_HAAR_SCALE_IMAGE, Size(30, 30));
for (size_t i = 0; i < faces.size(); i++)
{
Point center(faces[i].x + faces[i].width*0.5, faces[i].y + faces[i].height*0.5);
ellipse(frame, center, Size(faces[i].width*0.5, faces[i].height*0.5), 0, 0, 360, Scalar(255, 0, 255), 4, 8, 0);
Mat faceROI = frame_gray(faces[i]);
std::vector<Rect> eyes;
//-- In each face, detect eyes
eyes_cascade.detectMultiScale(faceROI, eyes, 1.1, 2, 0 | CV_HAAR_SCALE_IMAGE, Size(30, 30));
for (size_t j = 0; j < eyes.size(); j++)
{
Point center(faces[i].x + eyes[j].x + eyes[j].width*0.5, faces[i].y + eyes[j].y + eyes[j].height*0.5);
int radius = cvRound((eyes[j].width + eyes[j].height)*0.25);
circle(frame, center, radius, Scalar(255, 0, 0), 4, 8, 0);
}
}
//-- Show what you got
imshow(window_name, frame);
}
我按照this 线程中的描述将所有必要的库添加到链接依赖项中，尽管我仍然收到消息：
1>------ Build started: Project: openvc_program, Configuration: Debug x64 ------
1> main.cpp
1>c:\users\dan\desktop\opencvmy\openvc_program\openvc_program\main.cpp(71): warning C4244: 'argument': conversion from 'double' to 'int', possible loss of data
1>c:\users\dan\desktop\opencvmy\openvc_program\openvc_program\main.cpp(72): warning C4244: 'argument': conversion from 'double' to 'int', possible loss of data
1>c:\users\dan\desktop\opencvmy\openvc_program\openvc_program\main.cpp(82): warning C4244: 'argument': conversion from 'double' to 'int', possible loss of data
1>main.obj : error LNK2019: unresolved external symbol "public: __cdecl cv::CascadeClassifier::CascadeClassifier(void)" (??0CascadeClassifier@cv@@QEAA@XZ) referenced in function "void __cdecl `dynamic initializer for 'eyes_cascade''(void)" (??__Eeyes_cascade@@YAXXZ)
1>main.obj : error LNK2019: unresolved external symbol "public: virtual __cdecl cv::CascadeClassifier::~CascadeClassifier(void)" (??1CascadeClassifier@cv@@UEAA@XZ) referenced in function "void __cdecl `dynamic atexit destructor for 'eyes_cascade''(void)" (??__Feyes_cascade@@YAXXZ)
1>main.obj : error LNK2019: unresolved external symbol "public: bool __cdecl cv::CascadeClassifier::load(class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &)" (?load@CascadeClassifier@cv@@QEAA_NAEBV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@@Z) referenced in function main
1>main.obj : error LNK2019: unresolved external symbol "public: virtual void __cdecl cv::CascadeClassifier::detectMultiScale(class cv::Mat const &,class std::vector<class cv::Rect_<int>,class std::allocator<class cv::Rect_<int> > > &,double,int,int,class cv::Size_<int>,class cv::Size_<int>)" (?detectMultiScale@CascadeClassifier@cv@@UEAAXAEBVMat@2@AEAV?$vector@V?$Rect_@H@cv@@V?$allocator@V?$Rect_@H@cv@@@std@@@std@@NHHV?$Size_@H@2@2@Z) referenced in function "void __cdecl detectAndDisplay(class cv::Mat)" (?detectAndDisplay@@YAXVMat@cv@@@Z)
1>C:\Users\Dan\Desktop\opencvMy\openvc_program\x64\Debug\openvc_program.exe : fatal error LNK1120: 4 unresolved externals
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========
我应该怎么做才能解决这个问题？
【问题讨论】：
-
你链接到调试库了吗？还是发布库？
-
我链接到调试库
标签： c++ visual-studio opencv object-detection