youtube.cpp
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#include <openbr_plugin.h>
#include "core/common.h"
namespace br
{
/*!
* \ingroup transforms
* \brief Implements the YouTubesFaceDB \cite wolf11 experimental protocol.
* \author Josh Klontz \cite jklontz
*/
class YouTubeFacesDBTransform : public UntrainableMetaTransform
{
Q_OBJECT
Q_PROPERTY(QString algorithm READ get_algorithm WRITE set_algorithm RESET reset_algorithm STORED false)
BR_PROPERTY(QString, algorithm, "")
QSharedPointer<Transform> transform;
QSharedPointer<Distance> distance;
void init()
{
if (algorithm.isEmpty()) return;
transform = Transform::fromAlgorithm(algorithm);
distance = Distance::fromAlgorithm(algorithm);
}
void project(const TemplateList &src, TemplateList &dst) const
{
Transform::project(src.mid(1) /* First template is the header in 'splits.txt' */, dst);
}
void project(const Template &src, Template &dst) const
{
const QStringList words = src.file.name.split(", ");
dst.file.name = words[0] + "_" + words[1] + "_" + words[4] + ".mtx";
TemplateList queryTemplates = TemplateList::fromGallery(File(words[2]).resolved());
sort(queryTemplates);
queryTemplates >> *transform;
TemplateList targetTemplates = TemplateList::fromGallery(File(words[3]).resolved());
sort(targetTemplates);
targetTemplates >> *transform;
QScopedPointer<MatrixOutput> memoryOutput(MatrixOutput::make(targetTemplates.files(), queryTemplates.files()));
distance->compare(targetTemplates, queryTemplates, memoryOutput.data());
dst.clear();
dst.m() = memoryOutput.data()->data;
}
static void sort(TemplateList &templates)
{
// The file names in the YouTube Faces Database make it very difficult
// for them to be ordered by frame number automatically,
// hence we do it manually here.
QList<int> frames;
foreach (const Template &t, templates) {
QStringList words = t.file.name.split('.');
frames.append(words[words.size()-2].toInt());
}
typedef QPair<int,int> SortedFrame; // <frame number, original index>
QList<SortedFrame> sortedFrames = Common::Sort(frames);
TemplateList sortedTemplates; sortedTemplates.reserve(templates.size());
foreach (const SortedFrame &sortedFrame, sortedFrames)
sortedTemplates.append(templates[sortedFrame.second]);
templates = sortedTemplates;
}
};
BR_REGISTER(Transform, YouTubeFacesDBTransform)
} // namespace br
#include "youtube.moc"