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124 | /* ============================================================
*
* This file is a part of digiKam project
* https://www.digikam.org
*
* Date : 25/08/2013
* Description : Image Quality Calculor
*
* SPDX-FileCopyrightText: 2013-2025 by Gilles Caulier <caulier dot gilles at gmail dot com>
* SPDX-FileCopyrightText: 2021-2022 by Phuoc Khanh Le <phuockhanhnk94 at gmail dot com>
*
* SPDX-License-Identifier: GPL-2.0-or-later
*
* ============================================================ */
#include "imagequalitycalculator.h"
// Qt includes
#include <QRecursiveMutex>
namespace Digikam
{
class Q_DECL_HIDDEN ImageQualityCalculator::Private
{
public:
Private() = default;
public:
float threshold_punish = 0.9F;
float weight_punish = 20.0F;
QRecursiveMutex mutex;
QList<ResultDetection> detectionResults;
};
ImageQualityCalculator::ImageQualityCalculator()
: d(new Private)
{
d->detectionResults = QList<ResultDetection>();
}
ImageQualityCalculator::~ImageQualityCalculator()
{
delete d;
}
void ImageQualityCalculator::addDetectionResult(const QString& name,
const float score,
const float weight) const
{
ResultDetection result;
result.detetionType = name;
result.weight = weight;
result.score = score;
QMutexLocker locker(&d->mutex);
d->detectionResults.append(result);
}
void ImageQualityCalculator::normalizeWeight() const
{
float sum = 0.0F;
for (const auto& result : std::as_const(d->detectionResults))
{
sum += result.weight;<--- Consider using std::accumulate algorithm instead of a raw loop.
}
for (auto& result : d->detectionResults)
{
if (sum != 0.0F)
{
result.weight /= sum;
}
}
}
float ImageQualityCalculator::calculateQuality() const
{
QMutexLocker locker(&d->mutex);
if (!numberDetectors())
{
return (-1.0F);
}
adjustWeightByQualityLevel();
normalizeWeight();
float damage = 0.0F;
for (const auto& result : std::as_const(d->detectionResults))
{
damage += result.score * result.weight;<--- Consider using std::accumulate algorithm instead of a raw loop.
}
return ((1.0F - damage) * 100.0F);
}
int ImageQualityCalculator::numberDetectors() const
{
return d->detectionResults.count();
}
void ImageQualityCalculator::adjustWeightByQualityLevel() const
{
for (auto& result : d->detectionResults)
{
if (result.score > d->threshold_punish)
{
result.weight *= d->weight_punish;
}
}
}
} // namespace Digikam
|