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vio/CPU_version/svo/test/test_feature_detection.cpp
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2021-05-05 11:19:06 +02:00

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// This file is part of SVO - Semi-direct Visual Odometry.
//
// Copyright (C) 2014 Christian Forster <forster at ifi dot uzh dot ch>
// (Robotics and Perception Group, University of Zurich, Switzerland).
//
// SVO is free software: you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the Free Software
// Foundation, either version 3 of the License, or any later version.
//
// SVO is distributed in the hope that it will be useful, but WITHOUT ANY
// WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
// FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
#include <string.h>
#include <svo/global.h>
#include <svo/config.h>
#include <svo/frame.h>
#include <svo/feature_detection.h>
#include <svo/depth_filter.h>
#include <svo/feature.h>
#include <vikit/timer.h>
#include <vikit/vision.h>
#include <vikit/abstract_camera.h>
#include <vikit/atan_camera.h>
#include "test_utils.h"
namespace {
using namespace Eigen;
using namespace std;
void testCornerDetector()
{
std::string img_name(svo::test_utils::getDatasetDir() + "/sin2_tex2_h1_v8_d/img/frame_000002_0.png");
printf("Loading image '%s'\n", img_name.c_str());
cv::Mat img(cv::imread(img_name, 0));
assert(img.type() == CV_8UC1 && !img.empty());
vk::AbstractCamera* cam = new vk::ATANCamera(752, 480, 0.511496, 0.802603, 0.530199, 0.496011, 0.934092);
svo::FramePtr frame(new svo::Frame(cam, img, 0.0));
// Corner detection
vk::Timer t;
svo::Features fts;
svo::feature_detection::FastDetector fast_detector(
img.cols, img.rows, svo::Config::gridSize(), svo::Config::nPyrLevels());
for(int i=0; i<100; ++i)
{
fast_detector.detect(frame.get(), frame->img_pyr_, svo::Config::triangMinCornerScore(), fts);
}
printf("Fast corner detection took %f ms, %zu corners detected (ref i7-W520: 7.166360ms, 40000)\n", t.stop()*10, fts.size());
printf("Note, in this case, feature detection also contains the cam2world projection of the feature.\n");
cv::Mat img_rgb = cv::Mat(img.size(), CV_8UC3);
cv::cvtColor(img, img_rgb, CV_GRAY2RGB);
std::for_each(fts.begin(), fts.end(), [&](svo::Feature* i){
cv::circle(img_rgb, cv::Point2f(i->px[0], i->px[1]), 4*(i->level+1), cv::Scalar(0,255,0), 1);
});
cv::imshow("ref_img", img_rgb);
cv::waitKey(0);
std::for_each(fts.begin(), fts.end(), [&](svo::Feature* i){ delete i; });
}
} // namespace
int main(int argc, char **argv)
{
testCornerDetector();
return 0;
}