random.cpp
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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* Copyright 2012 The MITRE Corporation *
* *
* Licensed under the Apache License, Version 2.0 (the "License"); *
* you may not use this file except in compliance with the License. *
* You may obtain a copy of the License at *
* *
* http://www.apache.org/licenses/LICENSE-2.0 *
* *
* Unless required by applicable law or agreed to in writing, software *
* distributed under the License is distributed on an "AS IS" BASIS, *
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. *
* See the License for the specific language governing permissions and *
* limitations under the License. *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
#include <opencv2/imgproc/imgproc.hpp>
#include <openbr_plugin.h>
#include "core/common.h"
#include "core/opencvutils.h"
using namespace cv;
using namespace br;
/*!
* \ingroup transforms
* \brief Selects a random transform.
* \author Josh Klontz \cite jklontz
*/
class RndTransform : public Transform
{
Q_OBJECT
Q_PROPERTY(QList<br::Transform*> transforms READ get_transforms WRITE set_transforms RESET reset_transforms STORED false)
BR_PROPERTY(QList<br::Transform*>, transforms, QList<br::Transform*>())
int selectedIndex;
Transform *selectedTransform;
void train(const TemplateList &data)
{
selectedIndex = theRNG().uniform(0, transforms.size());
selectedTransform = transforms[selectedIndex]->clone();
selectedTransform->train(data);
}
void project(const Template &src, Template &dst) const
{
selectedTransform->project(src, dst);
}
void store(QDataStream &stream) const
{
stream << selectedIndex << *selectedTransform;
}
void load(QDataStream &stream)
{
stream >> selectedIndex;
selectedTransform = transforms[selectedIndex]->clone();
stream >> *selectedTransform;
}
};
BR_REGISTER(Transform, RndTransform)
/*!
* \ingroup transforms
* \brief Generates a random subspace.
* \author Josh Klontz \cite jklontz
*/
class RndSubspace : public Transform
{
Q_OBJECT
Q_PROPERTY(float fraction READ get_fraction WRITE set_fraction RESET reset_fraction STORED false)
Q_PROPERTY(bool weighted READ get_weighted WRITE set_weighted RESET reset_weighted STORED false)
BR_PROPERTY(float, fraction, 0.5)
BR_PROPERTY(bool, weighted, false)
Mat map;
void train(const TemplateList &data)
{
int cols = data.first().m().cols;
int size = data.first().m().rows * cols;
QList<float> weights; weights.reserve(size);
if (weighted) {
Mat flatData = OpenCVUtils::toMat(data.data());
for (int i=0; i<size; i++) {
Scalar mean, stddev;
cv::meanStdDev(flatData.col(i), mean, stddev);
weights.append(pow(stddev[0],2.0));
}
} else {
for (int i=0; i<size; i++)
weights.append(1);
}
const int dimsOut = weights.size()*fraction;
QList<int> sample = Common::RandSample(dimsOut, weights);
Mat xMap(1, dimsOut, CV_16SC1);
Mat yMap(1, dimsOut, CV_16SC1);
for (int j=0; j<dimsOut; j++) {
int index = sample[j];
xMap.at<short>(0,j) = index % cols;
yMap.at<short>(0,j) = index / cols;
}
std::vector<Mat> mv;
mv.push_back(xMap);
mv.push_back(yMap);
merge(mv, map);
}
void project(const Template &src, Template &dst) const
{
remap(src, dst, map, Mat(), INTER_NEAREST);
}
void store(QDataStream &stream) const
{
stream << fraction << weighted << map;
}
void load(QDataStream &stream)
{
stream >> fraction >> weighted >> map;
}
};
BR_REGISTER(Transform, RndSubspace)
/*!
* \ingroup transforms
* \brief Selects a random region.
* \author Josh Klontz \cite jklontz
*/
class RndRegion : public Transform
{
Q_OBJECT
Q_PROPERTY(float x READ get_x WRITE set_x RESET reset_x)
Q_PROPERTY(float y READ get_y WRITE set_y RESET reset_y)
Q_PROPERTY(float width READ get_width WRITE set_width RESET reset_width)
Q_PROPERTY(float height READ get_height WRITE set_height RESET reset_height)
BR_PROPERTY(float, x, -1)
BR_PROPERTY(float, y, -1)
BR_PROPERTY(float, width, -1)
BR_PROPERTY(float, height, -1)
void train(const TemplateList &data)
{
(void) data;
RNG &rng = theRNG();
width = rng.uniform(0.f, 1.f);
height = rng.uniform(0.f, 1.f);
x = rng.uniform(0.f, 1.f-width);
y = rng.uniform(0.f, 1.f-height);
}
void project(const Template &src, Template &dst) const
{
dst = src.m()(Rect(src.m().cols * x,
src.m().rows * y,
src.m().cols * width,
src.m().rows * height));
}
};
BR_REGISTER(Transform, RndRegion)
/*!
* \ingroup transforms
* \brief Generates a random landmark.
* \author Josh Klontz \cite jklontz
*/
class RndPoint : public Transform
{
Q_OBJECT
Q_PROPERTY(float x READ get_x WRITE set_x RESET reset_x)
Q_PROPERTY(float y READ get_y WRITE set_y RESET reset_y)
BR_PROPERTY(float, x, -1)
BR_PROPERTY(float, y, -1)
void train(const TemplateList &data)
{
(void) data;
RNG &rng = theRNG();
x = rng.uniform(0.f, 1.f);
y = rng.uniform(0.f, 1.f);
}
void project(const Template &src, Template &dst) const
{
dst = src;
dst.file.appendLandmark(QPointF(src.m().cols * x, src.m().rows * y));
}
};
BR_REGISTER(Transform, RndPoint)
#include "random.moc"