level 6
yungenlan
楼主
小弟我目前要在Windows Qt2.5下学习，opencv2.4.8人脸检测。但每次运行都遇到
老是出现错误error: undefined reference to `cv::CascadeClassifier::load(std::string const&)' 请问库文件都需要添加哪些了？？
代码是抄网上版本的，说可以运行。
using namespace std; using namespace cv;
/** Function Headers */ void detectAndDisplay( Mat frame );
/** Global variables */ String face_cascade_name = "../myFace/haarcascade_frontalface_alt.xml"; String eyes_cascade_name = "../myFace/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 ); }
2014年03月09日 06点03分
1
老是出现错误error: undefined reference to `cv::CascadeClassifier::load(std::string const&)' 请问库文件都需要添加哪些了？？
代码是抄网上版本的，说可以运行。
using namespace std; using namespace cv;
/** Function Headers */ void detectAndDisplay( Mat frame );
/** Global variables */ String face_cascade_name = "../myFace/haarcascade_frontalface_alt.xml"; String eyes_cascade_name = "../myFace/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 ); }
