examples/Qt/facerecgapp/facerecg.cpp

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#include "facerecg.h"
#include <QMessageBox>

FaceRecgApp::FaceRecgApp(QObject* parent) : QObject(parent)
    { 
    //mTrainOrRecongise = true;
    m_Thumbnailer = new DummyFaceThumbnailer(this);
    m_FaceDB = new XQFaceDatabase(*m_Thumbnailer, QString(), this);
    m_Recognizer = new XQFaceRecognizer(*m_FaceDB, this);
    connect(m_Recognizer, SIGNAL(facesRecognized(const QString&, const QImage&, QList<XQFaceRegion>)),
            this, SLOT(recongnised(const QString&, const QImage&, QList<XQFaceRegion>)));
    }
FaceRecgApp::~FaceRecgApp()
    {
    if(m_FaceDB)
        m_FaceDB->clearFaceReferences("FRAPPL1");
    }


void FaceRecgApp::train(const QString sourceId)
{
    mTrainOrRecongise = true;
    m_Recognizer->processFaces(sourceId);
    while(m_Recognizer->isProcessing())
    { // this is waiting as the current image proecessing is synchronous call 
    }
}

void FaceRecgApp::recongnised(const QString& sourceId, const QImage& image, QList<XQFaceRegion> faceRegions)
{
    if(mTrainOrRecongise)
        { // In training part, to set face id if recognised.
        if(!faceRegions.isEmpty())
            {// Found face regions.
            foreach (XQFaceRegion region ,faceRegions) {
                // define a face id and set it in recogniser db
                region.setFaceId("FRAPPL1");
                }
            }
        else
            {// Could not find any face regions.
            QMessageBox msgBox;
            msgBox.setInformativeText(tr("Proper Face could not be detected, try again"));
            qWarning("training: incorrect image!!!"); 
            msgBox.exec();
            }
        }
    else
        { // In recognise part, to match the regions face id with trained one.
        if(!faceRegions.isEmpty())
            {
            foreach (XQFaceRegion region ,faceRegions)
                {
                QStringList myString = region.faceIds();
                if(!myString.isEmpty())
                    {
                    if((myString[0].compare("FRAPPL1") == 0))
                        {                    
                        if((region.isConfirmed() == true))
                            {// Face is recognised.                  
                            emit resultCompared(true);
                            break;
                            }
                        else
                            {// Could not recognise the face.
                            emit resultCompared(false);
                            }
                        }
                    else
                        {// Could not recognise the face and as it is not same as trained face id.
                        emit resultCompared(false);
                        }
                    }
                else
                    {
                    // Could not recognise any valid face ids or
                    // the recogniser is not trained.                    
                    emit resultCompared(false);
                    }
                } // End of for loop.
            }
        }
}

void FaceRecgApp::reset()
{   // Clear all face references for the face id.
    if(m_FaceDB)
        m_FaceDB->clearFaceReferences("FRAPPL1");
}

void FaceRecgApp::test(const QString imageInput)
{
    mTrainOrRecongise = false;
    m_Recognizer->processFaces(imageInput);
    while(m_Recognizer->isProcessing())
    { // This is waiting as the current proecessing is synchronous call.
    }
}

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