hash.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 <QCryptographicHash>
#include "openbr_internal.h"
#include "openbr/core/qtutils.h"
using namespace cv;
namespace br
{
/*!
* \ingroup transforms
* \brief Wraps QCryptographicHash
* \author Josh Klontz \cite jklontz
*/
class CryptographicHashTransform : public UntrainableTransform
{
Q_OBJECT
Q_ENUMS(Algorithm)
Q_PROPERTY(Algorithm algorithm READ get_algorithm WRITE set_algorithm RESET reset_algorithm STORED false)
public:
/*!< */
enum Algorithm { Md4 = QCryptographicHash::Md4,
Md5 = QCryptographicHash::Md5,
Sha1 = QCryptographicHash::Sha1 };
private:
BR_PROPERTY(Algorithm, algorithm, Md5)
void project(const Template &src, Template &dst) const
{
const cv::Mat &m = src;
QByteArray data((const char *)m.data, int(m.total()*m.elemSize()));
QByteArray hash = QCryptographicHash::hash(data, (QCryptographicHash::Algorithm)algorithm);
cv::Mat n(1, hash.size(), CV_8UC1);
memcpy(n.data, hash.data(), hash.size());
dst = Template(src.file, n);
}
};
BR_REGISTER(Transform, CryptographicHashTransform)
/*!
* \ingroup transforms
* \brief Kernel hash
* \author Josh Klontz \cite jklontz
*/
class KernelHashTransform : public UntrainableTransform
{
Q_OBJECT
Q_PROPERTY(uchar dimsIn READ get_dimsIn WRITE set_dimsIn RESET reset_dimsIn STORED false)
Q_PROPERTY(uchar dimsOut READ get_dimsOut WRITE set_dimsOut RESET reset_dimsOut STORED false)
BR_PROPERTY(uchar, dimsIn, 8)
BR_PROPERTY(uchar, dimsOut, 7)
void project(const Template &src, Template &dst) const
{
if (src.m().type() != CV_8UC1)
qFatal("Expected 8UC1 input.");
dst = Mat::zeros(src.m().rows, src.m().cols, CV_8UC1);
const uchar *srcData = src.m().data;
uchar *dstData = dst.m().data;
const int step = src.m().cols;
for (int i=0; i<src.m().rows-1; i++)
for (int j=0; j<src.m().cols-1; j++) {
dstData[i*step+j] = (uint(pow(float(dimsIn),1.f))*srcData[i *step+j]
+ uint(pow(float(dimsIn),2.f))*srcData[(i+1)*step+j]
+ uint(pow(float(dimsIn),0.f))*srcData[i *step+(j+1)]
/*+ uint(pow(float(dimsIn),0.f))*srcData[(i+1)*step+(j+1)]*/) % dimsOut;
}
}
};
BR_REGISTER(Transform, KernelHashTransform)
} // namespace br
#include "hash.moc"