collectnn.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 <openbr/plugins/openbr_internal.h>
namespace br
{
/*!
* \ingroup transforms
* \brief Collect nearest neighbors and append them to metadata.
* \author Charles Otto \cite caotto
* \br_property int keep The maximum number of nearest neighbors to keep. Default is 20.
*/
class CollectNNTransform : public UntrainableMetaTransform
{
Q_OBJECT
Q_PROPERTY(int keep READ get_keep WRITE set_keep RESET reset_keep STORED false)
BR_PROPERTY(int, keep, 20)
void project(const Template &src, Template &dst) const
{
dst.file = src.file;
dst.clear();
dst.m() = cv::Mat();
Neighbors neighbors;
for (int i=0; i < src.m().cols;i++) {
// skip self compares
if (i == src.file.get<int>("FrameNumber"))
continue;
neighbors.append(Neighbor(i, src.m().at<float>(0,i)));
}
int actuallyKeep = std::min(keep, neighbors.size());
std::partial_sort(neighbors.begin(), neighbors.begin()+actuallyKeep, neighbors.end(), compareNeighbors);
Neighbors selected = neighbors.mid(0, actuallyKeep);
dst.file.set("neighbors", QVariant::fromValue(selected));
}
};
BR_REGISTER(Transform, CollectNNTransform)
} // namespace br
#include "cluster/collectnn.moc"