void WebCamData::trackFace() {
CvConnectedComp comps;
updateHugeImage(d->data);
cvCalcBackProject(&d->hueImage, d->prob, d->histogram);
cvAnd(d->prob, d->mask, d->prob, 0);
CvBox2D box;
cvCamShift(d->prob, d->faceRect,
cvTermCriteria(CV_TERMCRIT_EPS | CV_TERMCRIT_ITER, 10, 1), &comps,
&box);
d->faceRect = comps.rect;
int radius = cvRound((d->faceRect.width + d->faceRect.height) * 0.25);
CvPoint center;
center.x = cvRound(d->faceRect.x + d->faceRect.width * 0.5);
center.y = cvRound(d->faceRect.y + d->faceRect.height * 0.5);
/*
qDebug() << Q_FUNC_INFO
<< comps.rect.x
<< comps.rect.y
<< comps.rect.width
<< comps.rect.height
<< box.angle
<< center.x
<< center.y
<< radius;
*/
d->dataMap.clear();
d->dataMap["z"] = QVariant(radius);
d->dataMap["x"] = QVariant(center.x);
d->dataMap["y"] = QVariant(center.y);
d->dataMap["angle"] = QVariant(box.angle);
Q_EMIT dataReady();
}
QRect WebCamData::detectFace(const char* faceData)
{
if (d->hasFace) {
trackFace();
return QRect();
}
if (!d->mCascade) {
qDebug() << Q_FUNC_INFO << ": " << "Error incorrect Haar classifier cascade";
return QRect();
}
CvRect* rect = 0;
int faceSize = d->data->width / 5;
d->mFaceSeq = cvHaarDetectObjects(d->data,
d->mCascade, d->mFaceStore, 1.1, 6,
CV_HAAR_DO_CANNY_PRUNING,
cvSize(faceSize, faceSize));
// qDebug() << "Number of Faces Detected" << d->mFaceSeq->total;
if (d->mFaceSeq && d->mFaceSeq->total) {
rect = (CvRect*) cvGetSeqElem(d->mFaceSeq, 0);
d->hasFace = true;
int radius = cvRound((rect->width + rect->height) * 0.25);
CvPoint center;
center.x = cvRound(rect->x + rect->width * 0.5);
center.y = cvRound(rect->y + rect->height * 0.5);
//qDebug() << "Radius : " << radius << " X: " << center.x << "Y : " << center.y;
//histogram
float max = 0.f;
float range[] = {0, 180};
float* ranges = range;
int bins = 30;
d->hsvImage = cvCreateImage(cvGetSize(d->data), 8, 3);
d->hueImage = cvCreateImage(cvGetSize(d->data), 8, 1);
d->mask = cvCreateImage(cvGetSize(d->data), 8, 1);
d->prob = cvCreateImage(cvGetSize(d->data), 8, 1);
d->histogram = cvCreateHist(1, &bins, CV_HIST_ARRAY, &ranges, 1);
updateHugeImage(d->data);
cvSetImageROI(d->hueImage, *rect);
cvSetImageROI(d->mask, *rect);
cvCalcHist(&d->hueImage, d->histogram, 0, d->mask);
cvGetMinMaxHistValue(d->histogram, 0, &max, 0, 0);
cvConvertScale(d->histogram->bins, d->histogram->bins, max ? 255.0 / max : 0, 0);
cvResetImageROI(d->hueImage);
cvResetImageROI(d->mask);
d->faceRect = *rect;
/*
*/
}
return QRect();
}
