I am trying to get started in opneCv and get learning but am running into problems in regards to face detection the code I have should detect faces I believe my linkages are fine can someone please help me understand what I'm doing wrong? full code in both main.cpp and project.pro file is provided below
**App Output:**
*starting /Users/admin/Desktop/build-Origin-Desktop_Qt_5_6_0_clang_64bit-Debug/Origin.app/Contents/MacOS/Origin...
OpenCV Error: Assertion failed (!empty()) in detectMultiScale, file /Users/admin/Desktop/opencv-3.1.0/modules/objdetect/src/cascadedetect.cpp, line 1639
Cleaned up camera.
Unable to initiate camera
/Users/admin/Desktop/build-Origin-Desktop_Qt_5_6_0_clang_64bit-Debug/Origin.app/Contents/MacOS/Origin exited with code 0*
**Compile Output:**
*10:46:41: Running steps for project Origin...
10:46:41: Configuration unchanged, skipping qmake step.
10:46:41: Starting: "/usr/bin/make"
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang++ -c -pipe -stdlib=libc++ -g -std=gnu++11 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.11.sdk -mmacosx-version-min=10.7 -Wall -W -fPIC -DQT_QML_DEBUG -DQT_WIDGETS_LIB -DQT_GUI_LIB -DQT_CORE_LIB -I../Origin -I. -I/usr/local/include -I../../Qt/5.6/clang_64/lib/QtWidgets.framework/Headers -I../../Qt/5.6/clang_64/lib/QtGui.framework/Headers -I../../Qt/5.6/clang_64/lib/QtCore.framework/Headers -I. -I/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.11.sdk/System/Library/Frameworks/OpenGL.framework/Headers -I/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.11.sdk/System/Library/Frameworks/AGL.framework/Headers -I. -I../../Qt/5.6/clang_64/mkspecs/macx-clang -F/Users/admin/Qt/5.6/clang_64/lib -o main.o ../Origin/main.cpp
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang++ -headerpad_max_install_names -stdlib=libc++ -Wl,-syslibroot,/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.11.sdk -mmacosx-version-min=10.7 -Wl,-rpath,/Users/travishaycock/Qt/5.6/clang_64/lib -o Origin.app/Contents/MacOS/Origin main.o mainwindow.o moc_mainwindow.o -F/Users/admin/Qt/5.6/clang_64/lib -L/usr/local/lib -lopencv_core -lopencv_highgui -lopencv_videoio -lopencv_imgproc -lopencv_objdetect -framework QtWidgets -framework QtGui -framework QtCore -framework OpenGL -framework AGL
10:46:43: The process "/usr/bin/make" exited normally.
10:46:43: Elapsed time: 00:02.*
**Main.cpp File**
#include "mainwindow.h"
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
using namespace cv;
using namespace std;
CascadeClassifier face_cascade, eyes_cascade;
String window_name = "Face Detection";
/**
* Detects faces
*/
void detectFaces(Mat frame) {
std::vector faces;
Mat frame_gray;
cvtColor(frame, frame_gray, COLOR_BGR2GRAY); // Convert to gray scale
equalizeHist(frame_gray, frame_gray); // Equalize histogram
// Detect faces
face_cascade.detectMultiScale(frame_gray, faces, 1.1, 3,
0|CASCADE_SCALE_IMAGE, Size(30, 30));
// Iterate over all of the faces
for(size_t i = 0; i < faces.size(); i++) {
// Find center of faces
Point center(faces[i].x + faces[i].width/2, faces[i].y + faces[i].height/2);
Mat face = frame_gray(faces[i]);
std::vector eyes;
// Try to detect eyes, inside each face
eyes_cascade.detectMultiScale(face, eyes, 1.1, 2,
0 |CASCADE_SCALE_IMAGE, Size(30, 30) );
// Check to see if eyes inside of face, if so, draw ellipse around face
if(eyes.size() > 0)
ellipse(frame, center, Size(faces[i].width/2, faces[i].height/2),
0, 0, 360, Scalar( 255, 0, 255 ), 4, 8, 0 );
}
imshow( window_name, frame );
}
int main(int argc, char *argv[]){
QApplication a(argc, argv);
MainWindow w;
// cam code
try{
VideoCapture cap(0); // Open default camera
Mat frame;
// Load preconstructed classifier
face_cascade.load("haarcascade_frontalface_alt.xml");
while(cap.read(frame)) {
detectFaces(frame); // Call function to detect faces
if( waitKey(30) >= 0) // Pause key
break;
}
return 0;
}catch(Exception ex){
std::cout << "Unable to initiate camera" << std::endl;
}
//end cam code
w.show();
return a.exec();
}
**Project.Pro File**
QT += core gui
greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
TARGET = Origin
TEMPLATE = app
SOURCES += main.cpp\
mainwindow.cpp
LIBS += \
-L/usr/local/lib \
-lopencv_core \
-lopencv_highgui \
-lopencv_videoio \
-lopencv_imgproc \
-lopencv_objdetect
INCLUDEPATH += \
/usr/local/include
HEADERS += mainwindow.h
FORMS += mainwindow.ui
↧
